{"id":656,"date":"2026-06-18T09:55:27","date_gmt":"2026-06-18T09:55:27","guid":{"rendered":"https:\/\/farm-balers.com\/?p=656"},"modified":"2026-06-22T09:25:32","modified_gmt":"2026-06-22T09:25:32","slug":"optimal-baling-window-for-rice-straw-in-japan-and-south-korea-post-harvest","status":"publish","type":"post","link":"https:\/\/farm-balers.com\/zh_tw\/application\/optimal-baling-window-for-rice-straw-in-japan-and-south-korea-post-harvest\/","title":{"rendered":"Optimal Baling Window for Rice Straw in Japan and South Korea Post-Harvest"},"content":{"rendered":"
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Rice Straw Baling \u2014 Japan and South Korea Season Guide<\/p>\n

A technical guide for Korean and Japanese rice straw operators explaining the optimal post-harvest baling window \u2014 covering regional harvest timing differences, moisture drying curves, weather risk windows, round baler machine selection for each phase, and the regulatory frameworks that constrain or incentivize rice straw collection in both countries.<\/p>\n

Trailer Round Baler<\/a><\/p>\n<\/div>\n

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Why Timing the Baling Window Matters More Than Machine Specification<\/p>\n

1. The Post-Harvest Window in East Asian Rice Agriculture: A Calendar Problem With Expensive Consequences<\/h2>\n

Rice straw management in Japan and South Korea presents a narrow, weather-sensitive collection window that operators in wheat or hay farming rarely encounter at equivalent intensity. Both countries practice predominantly single-crop (ichimake in Japanese terms) or \u2014 in parts of southern Korea \u2014 double-crop rice production, and in both cases the harvest event deposits rice straw across the paddy surface at a point in the autumn calendar when drying conditions, field access, and subsequent tillage scheduling all exert competing demands on the farm’s available time. Getting the baling window right \u2014 meaning starting early enough to capture straw before weather deterioration, but not so early that the straw is still too wet to produce safe, market-quality bales \u2014 determines both the commercial outcome of the straw harvest and the agronomic outcome of the field management season.<\/p>\n

A round baler machine deployed too early on wet rice straw (above 22% moisture) produces bales that are prone to biological heating during storage \u2014 a process where residual microbiological activity in the compressed, moist straw generates heat that can reach temperatures high enough to begin combustion in extreme cases, or more commonly, to degrade bale quality to a level where livestock or biomass buyers reject the material. A round baler deployed too late \u2014 after the baling window has been narrowed by autumn rainfall events or the onset of consistently cold weather \u2014 encounters straw that has been reabsorbed moisture from rain, dew, or frost, requiring remedial re-raking to restore windrow height before baling can proceed. Both of these timing errors impose real costs: either degraded bale value from premature baling, or additional field operations and potential straw loss from delayed baling.<\/p>\n

This guide defines the optimal baling windows for the major rice-growing regions of South Korea and Japan, explains the meteorological and crop factors that determine those windows, and recommends the 9YG round baler models most suited to each phase of the post-harvest rice straw management calendar in both countries.<\/p>\n<\/div>\n

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Regional Timing<\/p>\n

2. Harvest Timing by Region: South Korea and Japan Post-Harvest Calendar Comparison<\/h2>\n

The rice harvest calendar in South Korea and Japan is determined by latitude, variety maturity, and regional climate. The table below maps the primary rice-growing regions of both countries to their harvest windows and the resulting optimal straw baling windows.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n
Region<\/th>\n\u570b\u5bb6<\/th>\nHarvest Window<\/th>\nOptimal Baling Start<\/th>\nBaling Window Close<\/th>\nPrimary Risk<\/th>\n<\/tr>\n<\/thead>\n
Jeollanam-do \/ Gyeongsangnam-do (South)<\/td>\n\u97d3\u570b<\/td>\nLate Oct \u2013 mid-Nov<\/td>\n3\u20135 days post-harvest<\/td>\nLate November<\/td>\nLate autumn rain; early frost<\/td>\n<\/tr>\n
Chungcheongnam-do \/ Gyeonggi-do (Central)<\/td>\n\u97d3\u570b<\/td>\nMid-Oct \u2013 early Nov<\/td>\n3\u20135 days post-harvest<\/td>\nMid-November<\/td>\nEarlier frost; autumn rain<\/td>\n<\/tr>\n
Kyushu \/ Shikoku (South Japan)<\/td>\nJapan<\/td>\nEarly Oct \u2013 early Nov<\/td>\n4\u20136 days post-harvest<\/td>\nMid-November<\/td>\nTyphoon season late September\u2013October<\/td>\n<\/tr>\n
Kinki \/ Tokai (Central Japan)<\/td>\nJapan<\/td>\nMid-Oct \u2013 early Nov<\/td>\n3\u20135 days post-harvest<\/td>\nLate November<\/td>\nAutumn rain; field access after harvest<\/td>\n<\/tr>\n
Niigata \/ Tohoku (North Japan)<\/td>\nJapan<\/td>\nLate Sep \u2013 late Oct<\/td>\n3\u20134 days post-harvest<\/td>\nEarly November<\/td>\nEarly frost; cold dew compression; shorter window<\/td>\n<\/tr>\n
Hokkaido (North Japan)<\/td>\nJapan<\/td>\nMid Sep \u2013 early Oct<\/td>\n3\u20134 days post-harvest<\/td>\nLate October<\/td>\nShortest window; rapid frost onset; prioritize speed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

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Moisture Dynamics<\/p>\n

3. Understanding the Rice Straw Moisture Drying Curve After Harvest in Japan and Korea<\/h2>\n

The moisture content of rice straw at harvest time \u2014 when the combine deposits it on the paddy surface \u2014 typically ranges from 25\u201340% in Korea and Japan depending on weather conditions in the 2\u20133 weeks before harvest, the variety’s natural drying rate at maturity, and whether early morning harvesting has been performed on straw that has absorbed dew overnight. This initial moisture level is well above the target baling range of 12\u201318%, and the rate at which field drying brings the straw down to target range depends on a combination of temperature, solar radiation, wind, and the physical structure of the straw mat left by the combine.<\/p>\n

In typical autumn conditions in both Korea and Japan \u2014 mild temperatures of 15\u201322\u00b0C, moderate solar radiation, and light winds \u2014 rice straw deposited at 30\u201335% moisture will generally reach the 18\u201322% range within 2\u20133 days and the target 12\u201318% range within 3\u20136 days, depending on the windrow thickness and whether the straw has been raked to improve air circulation through the mat. A thick, flat mat deposited across the full combine cutting width will dry more slowly than the same material consolidated by a rake into a narrower windrow with more exposed surface area per unit mass. This is one of the arguments for raking rice straw before baling even when the combine windrow width is within the baler pickup width \u2014 the raking action lifts the mat, increases air circulation, and accelerates moisture loss by 30\u201350% compared to an undisturbed flat mat under equivalent weather conditions.<\/p>\n

The drying rate slows significantly once ambient temperatures drop below 10\u00b0C, which in northern Korean provinces and Tohoku Japan happens during the harvest window itself \u2014 meaning that the temperature-dependent drying that is reliable in southern Korea (Jeollam-do) and Kyushu Japan is not available at the same efficiency in Gyeonggi-do or Hokkaido. Operators in these higher-latitude regions must therefore either start baling at higher moisture (accepting some quality compromise) or deploy more aggressively with raking to compensate for the slower natural drying rate under cold conditions.<\/p>\n<\/div>\n

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Phase-by-Phase Strategy<\/p>\n

4. Three Phases of the Post-Harvest Baling Window and the Round Baler Strategy for Each<\/h2>\n

Experienced Korean and Japanese rice straw operators typically describe the post-harvest baling window in three phases, each with distinct weather conditions, straw moisture profiles, and machine management priorities. Understanding these phases allows operators to plan their baling calendar and machine configuration choices across the full window rather than treating every day the same.<\/p>\n

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Phase 1: Days 1\u20133 Post-Harvest (High Moisture)<\/h4>\n

Straw moisture 25\u201340%. Do not bale in this phase in most circumstances. The correct action is raking \u2014 consolidating the flat straw mat into a narrower windrow to accelerate drying. Using a side-delivery rake to combine two combine swaths into one consolidated windrow increases the exposed surface area and lifts the mat to allow air circulation beneath the straw layer. This raking pass, performed 1\u20132 days after harvest when the surface of the mat has started to show signs of surface drying, is the highest-value single field operation in the entire rice straw management calendar. Korean operators who skip this raking step to save time typically find that their baling window extends by 2\u20133 additional days as the thick flat mat dries much more slowly than a consolidated windrow.<\/p>\n<\/div>\n

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Phase 2: Days 3\u20138 Post-Harvest (Optimal Window)<\/h4>\n

Straw moisture 12\u201322%. This is the productive baling phase where round baler deployment generates the best bale quality outcomes. The round baler machine should be deployed as efficiently as possible during this window, prioritizing the completion of all targeted baling area before the weather risk of autumn rain or early frost events increases toward the end of the window. The sensor-controlled density management system on the 9YG series is particularly valuable during this phase because straw moisture continues to decrease across the period \u2014 bales formed at 20% moisture at the start of Phase 2 are heavier per unit volume than bales formed at 14% at the end, and the sensor system compensates for this by triggering ejection at a consistent mass-based density rather than at a fixed volume, keeping bale weight within the range expected by buyers throughout the productive phase.<\/p>\n<\/div>\n

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Phase 3: Days 8\u201315+ Post-Harvest (Risk Phase)<\/h4>\n

Straw moisture variable (may decrease to 8\u201310% in good conditions, or rebound to 18\u201325% after rain). This is the remediation and cleanup phase where operators address straw that was not captured in Phase 2. The key challenge is that rain events during Phase 3 can reset the straw from near-optimal baling condition back to Phase 1 moisture levels in a single heavy rain, requiring a re-raking pass before baling can resume. The hammer-claw pickup on the 9YG-1.0C is the best-suited machine configuration for Phase 3 baling in both Korea and Japan, because rain-rehydrated straw in the flat mat condition it reverts to after wetting is most reliably captured by the claw’s penetrating action rather than the spring-tooth’s sweep action.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Weather Risk Management<\/p>\n

5. Autumn Weather Risks in Japan and South Korea That Close the Baling Window Prematurely<\/h2>\n

The post-harvest baling window in both Japan and South Korea is constrained by specific autumn weather patterns that operators need to monitor and plan around. Understanding these patterns allows better pre-season planning of machine deployment timing and reduces the probability of being caught without sufficient baling capacity when favorable conditions are available and without a contingency plan when adverse weather closes the primary window.<\/p>\n

In Japan, the late typhoon season (September\u2013October) is the most significant weather risk for southern Kyushu and Shikoku rice straw operations. A typhoon passing over rice-growing regions during or immediately after harvest can deliver 100\u2013300mm of rain over 24\u201348 hours, completely saturating windrows and flattening any consolidated mat. Recovery time after a typhoon rain event is typically 5\u20137 days in warm October conditions in southern Japan \u2014 which can consume most of the remaining baling window for that region. For Japanese rice straw operators in typhoon-exposed regions, maintaining baling readiness from the earliest viable date (3\u20134 days post-harvest when moisture is still high but the weather window is favorable) is preferable to waiting for ideal moisture conditions that may be preempted by a weather event.<\/p>\n

In South Korea, the primary weather risk is the succession of autumn rain events associated with the tail of the East Asian monsoon and the cold front systems that push down from the north in October\u2013November. These are less intense than typhoons but more frequent \u2014 a 20\u201350mm rain event occurring every 3\u20135 days in many Korean paddy regions during the baling window is not unusual. Each rain event adds 1\u20132 days of straw drying recovery time and may require a re-raking pass if the windrow has been flattened. Korean operators who plan their harvest and baling calendar to concentrate baling immediately after the combine \u2014 rather than allowing a 7\u201310 day gap \u2014 consistently report better outcomes than operators who allow the straw to sit while waiting for perceived ideal conditions that autumn rain events eventually interrupt.<\/p>\n<\/div>\n

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Machine Selection<\/p>\n

6. Which 9YG Round Baler Model for Each Phase of the Japanese and Korean Rice Straw Window?<\/h2>\n

Machine selection for rice straw baling in Japan and Korea should be matched both to the operator’s total annual baling area and to the specific straw conditions that characterize the phase of the window when baling will be concentrated. The guidance below maps the 9YG series models to their primary phase application in both countries.<\/p>\n

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9YG-1.0C \u2014 Best for Phase 3 (Remediation) and Post-Rain Recovery<\/h4>\n

The 9YG-1.0C’s hammer-claw pickup is purpose-designed for the wet, flat, tangled straw condition that characterizes post-rain rice straw in both Korea and Japan. Its compact format (\u226570 kW, \u00d81000\u00d71250 mm bale) minimizes soil disturbance on soft paddy surfaces during late-window field operations when the soil has been subject to multiple rain events. For Korean and Japanese operators who need a machine primarily for the remediation phase \u2014 collecting rain-affected straw that was not captured during the main Phase 2 window \u2014 the 9YG-1.0C is the most effective single model. It also performs well in Phase 2 when the windrow is in good condition, making it a practical all-season rice straw choice for farms under 80 hectares.<\/p>\n<\/div>\n

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9YG-1.25A \u2014 Best for Phase 2 (Optimal Window) Across Cooperative Operations<\/h4>\n

The 9YG-1.25A with its 540\u20131000 r\/min PTO flexibility produces larger bales at \u00d81300\u00d71250 mm and is well-matched to Phase 2 conditions in Korea and Japan when the consolidated windrow is at 12\u201320% moisture and weather conditions are favorable. Its PTO input range accommodates the tractor diversity of Korean rice farming cooperatives and Japanese agricultural cooperative machinery pools (Nokyo machinery centers in Japan), where multiple different tractor models may be used across member farms. For operations targeting commercial livestock or biomass buyers who prefer the larger \u00d81300 mm bale format, the 9YG-1.25A covers the Phase 2 productive window efficiently while remaining compact enough for most paddy field access conditions.<\/p>\n<\/div>\n

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9YG-2.24D S9000 \/ Transcend \u2014 Best for Large-Area Phase 2 with Biomass Supply Target<\/h4>\n

For Korean rice operations supplying bales to RPS biomass utilities, or for Japanese rice straw contractors covering consolidated block areas of 150+ hectares per season, the 9YG-2.24D S9000 or Transcend provides the highest throughput at 40\u2013100 bales per hour and the widest pickup width at 2,240 mm. The sensor-controlled density management maximizes bale quality consistency during Phase 2 when windrow moisture varies across the day as morning dew evaporates and afternoon drying conditions differ from early-morning baling. The dual-coupling gearbox on the Transcend maintains consistent PTO transmission through the irregular headlands of small paddy plots that characterize both Korean and Japanese paddy farming, reducing the bale density gaps that occur during headland turns on conventional single-shaft PTO machines.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Manufacturing Structure<\/p>\n

7. How Frame Construction, Chamber Design, and Pickup Engineering Handle the Variability of the East Asian Rice Straw Window<\/h2>\n

The structural requirements of a round baler deployed across the full post-harvest rice straw window in Japan and Korea differ from those of a machine used only in the Phase 2 productive window. A machine that will be deployed from Phase 2 through Phase 3, across conditions ranging from well-dried consolidated windrows to rain-rehydrated flat mats on soft paddy soil, requires structural robustness at the pickup mounting, the feed throat, and the tailgate hinge that a narrower-use machine does not need to the same degree.<\/p>\n

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CNC Precision Frame for Consistent Performance Across the Window<\/h4>\n

The CNC laser-cut frame of the 9YG series maintains dimensional consistency that allows the pickup to be removed and reinstalled without specialist alignment tools \u2014 a feature that matters when operators need to switch between spring-tooth and hammer-claw configurations (on the 9YG-1.25 series) mid-season as rice straw conditions change between Phase 2 and Phase 3. Automated welding at all structural nodes ensures that the pickup mounting point geometry remains consistent across the machine’s working life, preventing the progressive misalignment of pickup-to-bale-chamber centerline that develops in manually-welded frames as weld joints distort asymmetrically under field stress.<\/p>\n<\/div>\n

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Bale Chamber and the Rice Straw Core Formation Problem<\/h4>\n

Rice straw’s tangled fiber structure creates a specific challenge in the early stages of bale chamber filling: the material tends to accumulate in loose, irregular piles at the chamber floor before beginning to rotate as a cohesive core. This delayed core formation can produce bales with a loose, incompletely-compressed center even when the surface density meets the sensor’s target. The press roller array geometry in the 9YG series \u2014 with rollers positioned to contact the forming bale across its full diameter rather than only at the equator \u2014 maintains compressive contact even in the early chamber fill stages, accelerating core formation and reducing the likelihood of a loose center in the completed bale.<\/p>\n<\/div>\n

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Tailgate Cylinder and Bale Ejection on Soft Paddy Surfaces<\/h4>\n

Bale ejection on soft Korean and Japanese paddy surfaces presents a specific challenge not encountered on firm dryland fields: the ejected bale deposits into a field surface that may have insufficient bearing capacity to hold the bale upright, causing it to roll or settle into a soft patch. The buffer cylinder tailgate design on the 9YG-2.24D Classic absorbs the opening shock of the heavily-loaded tailgate, protecting the hinge welds from the accelerated fatigue that repeated hard opening events cause in paddy field operating conditions where the paddy surface offers less resistance to bale rolling than a firm dryland field would, meaning the bale separates from the machine quickly and the tailgate opens against minimal external load.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Material System<\/p>\n

8. How Tine Steel, Chain Grade, Bearing Sealing, and Frame Coating Perform Across the Full East Asian Rice Straw Window<\/h2>\n

A round baler operating across the full post-harvest rice straw window in Japan and Korea encounters a wider range of material conditions in a single season than most other baling applications: from partially-dried 20% moisture straw in Phase 2 conditions, through rain-rehydrated 28% straw in Phase 3, to the occasional dry crisp straw at 10% moisture that develops when an extended dry spell occurs in late October. This material range variability, combined with the abrasive fine clay of paddy field surfaces and the lower ambient temperatures of late October\u2013November operation, tests the material system comprehensively.<\/p>\n

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Hammer-claw Tine Impact Resistance<\/h4>\n

Hammer-claw tines on the 9YG-1.0C are manufactured from high-strength alloy steel that balances hardness \u2014 for abrasion resistance against paddy silt \u2014 with toughness against impact from soil clods, buried stubble bases, and hard debris on the paddy surface. In Phase 3 conditions where the paddy surface has been softened by rain, tine contact with the soil surface is more frequent than in Phase 2, increasing the risk of claw fracture from embedded hard material. The alloy specification provides a fracture resistance margin for these Phase 3 conditions while maintaining the hardness needed to resist the accelerated tip wear from paddy clay abrasion that a softer tine alloy would experience more rapidly.<\/p>\n<\/div>\n

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Chain Drive \u2014 Cold-Weather Lubrication for Late Window<\/h4>\n

Korean and Japanese rice straw baling extends into November when ambient temperatures approach 5\u201310\u00b0C in central regions and below 5\u00b0C in northern regions. At these temperatures, standard chain lubricants increase significantly in viscosity, reducing their ability to penetrate chain link clearances on cold starts and providing thinner lubricant films at pin-bushing contact surfaces than they deliver at summer temperatures. Using a low-temperature penetrating oil rather than standard grease for chain lubrication during the November window maintains adequate film protection and ensures chain engagement stays smooth even on cold early-morning starts when the chain has been static overnight in sub-10\u00b0C conditions.<\/p>\n<\/div>\n

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Frame Coating for High-Humidity Paddy Storage<\/h4>\n

Korean and Japanese paddy farms store their baler machines in environments that are among the most challenging for unprotected steel in agricultural use: equipment sheds adjacent to paddy fields where ambient humidity is consistently high, condensation from temperature differentials between machine surfaces and ambient air occurs repeatedly through the storage period, and the residual paddy clay on machine surfaces acts as a moisture-retaining poultice against frame components. The electrostatic powder coating on 9YG series frames provides corrosion protection that resists this combination more effectively than spray paint, through both its adhesion quality at weld interfaces and its resistance to the chip damage that condensation cycling would accelerate on thinner surface coatings.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Gearbox and PTO<\/p>\n

9. Round Baler Gearbox Performance Across the Changing Conditions of the Japanese and Korean Rice Straw Window<\/h2>\n

The gearbox torque demand profile changes meaningfully between Phase 2 and Phase 3 of the rice straw baling window in Korea and Japan. In Phase 2, straw at 14\u201320% moisture compresses with moderate resistance, and the torque demand on the gearbox input is relatively stable across the working day once the machine reaches steady operating temperature. In Phase 3, rain-rehydrated straw at 22\u201330% moisture is significantly heavier per unit volume, and its tangled fiber structure presents higher compaction resistance than the more open Phase 2 windrow. This translates into a 20\u201335% higher average torque demand on the gearbox in Phase 3 compared to Phase 2, and a higher frequency of torque spikes from cluster events as tangled clumps of wet straw enter the chamber simultaneously.<\/p>\n

For Korean and Japanese cooperative operations where a single round baler machine must cover both Phase 2 and Phase 3 conditions across the full season, the gearbox’s torque rating should be evaluated against Phase 3 demands rather than Phase 2 demands. The 9YG-1.0C at 540 r\/min input provides a mechanical advantage: the lower rotational speed at the pickup and feed mechanism gives more time per cycle for the tangled wet straw to reorient and flow into the feed path, reducing the instantaneous cluster events that create the highest gearbox torque spikes in Phase 3 conditions. This is a less obvious benefit of the 540 r\/min specification than its compatibility with standard Korean and Japanese domestic-brand tractor PTO outputs, but it is a real operational advantage in wet rice straw handling.<\/p>\n

The gearbox oil change that should be performed at the start of the rice straw season in both Korea and Japan needs to use a multi-viscosity grade \u2014 SAE 80W-90 as a minimum \u2014 to maintain adequate lubricant viscosity across the temperature range from the warm early-season conditions of late October through the cold November conditions of the window close. Using SAE 90 monograde oil that was adequate for summer baling operations will provide insufficient cold-flow viscosity in November morning startup conditions in both northern Korean and northern Japanese paddy regions.<\/p>\n<\/div>\n

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Regulatory Frameworks<\/p>\n

10. Rice Straw Management Regulations, Machinery Safety Standards, and Gearbox Compliance in Japan and Korea<\/h2>\n

Both Japan and South Korea have developed regulatory frameworks that constrain open burning of rice straw and support mechanized baling, as well as machinery safety standards that apply to round balers operating in paddy field conditions.<\/p>\n

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Japan \u2014 Agriculture, Forestry and Fisheries Ministry (MAFF) Straw Burning Regulations<\/h4>\n

Japan’s Ministry of Agriculture, Forestry and Fisheries (MAFF) has progressively restricted open burning of crop residues including rice straw under the Law for the Promotion of Sustainable Agriculture. While outright national bans are not uniform across all prefectures, burning restrictions in designated areas \u2014 including regions near urban centers and in prefectures where air quality management objectives are most stringent \u2014 effectively require mechanized straw management. Prefectural agricultural offices in major rice-growing regions including Niigata, Akita, and Miyagi have issued guidelines on post-harvest rice straw management that prioritize baling and either incorporation or compost use over burning.<\/p>\n<\/div>\n

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Japan \u2014 JAMA Agricultural Machinery Safety Standards<\/h4>\n

The Japan Agricultural Machinery Industry Association (JAMA) publishes safety standards for agricultural machinery including round balers, aligned with ISO 4254-7 and referenced by the Ministry of Agriculture for machinery certification under the Food, Agriculture and Rural Areas Basic Plan. JAMA safety provisions for balers cover PTO shaft<\/a> guarding, pickup zone enclosure, and bale ejection safety mechanisms. Round balers imported into Japan for commercial rice straw baling use must either hold JAMA certification or demonstrate compliance with equivalent standards through documentation that Japanese agricultural cooperatives and their insurers recognize for machinery liability coverage.<\/p>\n<\/div>\n

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South Korea \u2014 Clean Air Conservation Act Post-Harvest Straw Burning Ban<\/h4>\n

Korea’s Clean Air Conservation Act, administered by the Ministry of Environment, prohibits field burning of rice straw in most paddy regions during designated autumn restriction periods. Local government enforcement in Gyeonggi-do, Chungcheong-do, Jeolla-do, and Gyeongsang-do has intensified since 2022, with on-site inspection by environmental management officials during the post-harvest period. For Korean rice farmers whose operations fall within restriction zones, the timing of the baling window is now partly determined by compliance requirements: the straw must be baled or incorporated within the post-harvest management deadline specified by the local government, creating a regulatory upper limit on how long the straw can remain in the field unmanaged.<\/p>\n<\/div>\n

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South Korea \u2014 RDA Machinery Type Approval and 2025 Subsidy Program<\/h4>\n

The Rural Development Administration (RDA) maintains the national type approval list for agricultural machinery eligible for purchase subsidy under the annual machinery support program. Round balers deployed for rice straw collection in Korea must hold current RDA type approval to qualify for the subsidy, which significantly reduces the net capital cost for Korean rice farmers making a round baler investment. The ISO 9001 quality management certification of the 9YG series manufacturing process supports the RDA approval documentation process. Korean buyers should confirm model-specific approval status at the time of purchase, as the approved machine list is updated annually and variants within a product series may have different approval status.<\/p>\n<\/div>\n

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ISO 4254-7 \u2014 International Baler Safety Standard for Paddy Field Operation<\/h4>\n

ISO 4254-7 covers baling machine safety requirements that are directly relevant to paddy field operating conditions in Japan and Korea: the floating ground surface on soft paddy soil creates additional risk of unexpected machine settling or tilting during bale ejection, making the tailgate crush protection provisions of ISO 4254-7 particularly pertinent. The standard is referenced by both Japanese (JAMA) and Korean (RDA, KS standards) machinery certification systems, and compliance documentation is expected by agricultural insurance providers in both countries as a condition of machinery liability coverage for commercial rice straw baling operations.<\/p>\n<\/div>\n

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Taiwan BAPHIQ and Southeast Asian Regional Context<\/h4>\n

While Taiwan, Vietnam, and Thailand are not the primary focus of this guide, their rice straw management regulatory developments are relevant context for Korean and Japanese equipment exporters. Taiwan’s Bureau of Animal and Plant Health Inspection and Quarantine (BAPHIQ) requirements for agricultural machinery import, and Vietnam’s MARD certification process, both create export documentation obligations that are comparable in structure to Korean and Japanese requirements. For equipment exporters who develop compliance documentation packages for Korean RDA and Japanese JAMA certification, adapting those packages for Southeast Asian markets is a manageable extension that opens the broader East and Southeast Asian rice straw baling market to a single product line.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Product Range<\/p>\n

11. 9YG Round Baler Models for the Japanese and Korean Rice Straw Harvest Season<\/h2>\n

All 9YG series models feature sensor-controlled density management, axial-flow semi-forced feeding, and are manufactured under ISO 9001 certification. Models are matched to different phases of the East Asian rice straw baling window below.<\/p>\n

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\n\"9YG-1.0C<\/a><\/p>\n
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9YG-1.0C \u2014 Phase 2 + 3<\/p>\n

\u226570 kW \u00b7 Hammer-claw \u00b7 540 r\/min \u00b7 \u00d81000\u00d71250 mm<\/p>\n<\/div>\n

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\n\"9YG-1.25A\"<\/a><\/p>\n
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9YG-1.25A \u2014 Phase 2<\/p>\n

\u226575 kW \u00b7 540\u20131000 r\/min \u00b7 Cooperative-ideal<\/p>\n<\/div>\n

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\n\"9YG-1.25\"<\/a><\/p>\n
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9YG-1.25<\/p>\n

\u226575 kW \u00b7 Interchangeable pickup \u00b7 Multi-phase<\/p>\n<\/div>\n

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\n\"9YG-1.0\"<\/a><\/p>\n
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9YG-1.0<\/p>\n

48\u201380 kW \u00b7 Spring-tooth \u00b7 Phase 2 dry conditions<\/p>\n<\/div>\n

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\n\"9YG-2.24D<\/a><\/p>\n
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9YG-2.24D Transcend<\/p>\n

55\u2013100 kW \u00b7 Dual gearbox \u00b7 Large-area Phase 2<\/p>\n<\/div>\n

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\n\"9YG-2.24D<\/a><\/p>\n
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9YG-2.24D S9000<\/p>\n

55\u2013100 kW \u00b7 Sensor density \u00b7 40\u2013100 bales\/h<\/p>\n<\/div>\n

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\n\"9YG-2.24D<\/a><\/p>\n
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9YG-2.24D Classic<\/p>\n

55\u2013100 kW \u00b7 Buffer cylinder gate<\/p>\n<\/div>\n

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\n\"9YG-2.24D<\/a><\/p>\n
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9YG-2.24D Base<\/p>\n

55\u2013100 kW \u00b7 Full pickup \u00b7 2240 mm width<\/p>\n<\/div>\n

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FAQ<\/p>\n

Frequently Asked Questions: Optimal Rice Straw Baling Window in Japan and South Korea<\/h2>\n
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\nQ1. What is the optimal baling window for rice straw in South Korean paddy farms and how many days after harvest should baling start?<\/summary>\n
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In South Korea, the optimal baling window begins 3\u20135 days after the rice combine harvest \u2014 earlier if the straw has been raked to accelerate drying, or slightly later if the weather has been cool and overcast. The target moisture for baling entry is 18\u201322%, dropping toward 12\u201316% for the best quality bales as the window progresses. The window closes when sustained cold weather with overnight frost risk begins \u2014 typically mid- to late November in southern provinces and earlier in central regions. Raking the rice straw windrow on Day 1\u20132 after harvest is the single most effective intervention for ensuring the straw reaches baling moisture by Day 3\u20134, without which the window may not open reliably before weather deterioration risk increases in the second half of October\u2013November.<\/p>\n<\/div>\n<\/details>\n

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\nQ2. How does the rice straw baling window differ between Jeollanam-do in South Korea and Hokkaido in Japan?<\/summary>\n
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The baling window difference between Jeollanam-do and Hokkaido is substantial. Jeollanam-do rice is harvested in late October to mid-November, with a baling window extending to late November \u2014 approximately 3\u20134 weeks of productive baling opportunity in most years. Hokkaido rice is harvested in mid-September to early October, and the baling window closes in late October when consistent frost onset ends reliable drying conditions \u2014 giving roughly 2\u20133 weeks. The Hokkaido window is also more temperature-constrained throughout: drying rates after harvest are slower at 8\u201315\u00b0C ambient compared to Jeollanam-do’s 12\u201320\u00b0C conditions, requiring more aggressive raking to compensate. Hokkaido operators need a round baler machine that can deploy immediately from the earliest viable date rather than waiting for optimal moisture conditions that the climate does not reliably provide.<\/p>\n<\/div>\n<\/details>\n

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\nQ3. Where can a Japanese rice farmer get a quote for a round baler suited to Phase 3 post-rain recovery baling of rice straw?<\/summary>\n
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Japanese rice farmers can request a quote through the contact section on this page. For Phase 3 post-rain recovery baling, the 9YG-1.0C with its hammer-claw pickup is the best-matched model \u2014 designed specifically for the flat, rehydrated rice straw mat condition that Phase 3 presents after autumn rain events in both Japanese and Korean paddy regions. Specifying your prefecture, the area of rice to be baled, your available tractor horsepower, and whether Phase 3 remediation or the full Phase 2 + 3 window is your primary requirement will allow our export team to provide the most relevant model recommendation, JAMA compliance documentation, and export logistics for Japanese import.<\/p>\n<\/div>\n<\/details>\n

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\nQ4. What round baler parts show the most wear after a full Japanese or Korean rice straw baling season in paddy field conditions?<\/summary>\n
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After a full Korean or Japanese rice straw season across Phase 2 and Phase 3 conditions, the highest-wear round baler parts are: hammer-claw tine tips \u2014 paddy clay abrasion and Phase 3 soil contact accelerate tip wear beyond what is experienced in dryland hay applications; pickup reel end bearings \u2014 paddy clay infiltration despite sealed construction creates abrasive wear that manifests as increased bearing roughness after 1\u20132 paddy seasons; roller chain \u2014 paddy clay infiltration at chain link clearances combined with the higher torque loads of wet Phase 3 rice straw accelerates pin-bushing wear; and net wrap knife blades \u2014 the higher silica content of Japanese and Korean rice straw dulls cutting edges faster than wheat straw applications. Post-season inspection of all four component types, with proactive replacement of any showing measurable wear, prevents compounding degradation in the following season.<\/p>\n<\/div>\n<\/details>\n

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\nQ5. How does the round baler gearbox performance differ between Phase 2 and Phase 3 rice straw conditions in Korean paddy fields?<\/summary>\n
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In Phase 2 (12\u201320% moisture straw), the gearbox operates at moderate, relatively stable torque with occasional spikes from windrow density variations. In Phase 3 (22\u201330% moisture, rain-rehydrated straw), the average torque demand increases by 20\u201335% due to the higher mass per volume of wet straw and the tangled mat structure that presents higher compaction resistance. Peak torque spikes are also more frequent in Phase 3 as wet straw clusters enter the chamber unevenly. This means that a gearbox operating comfortably within its rated capacity in Phase 2 may be working at 75\u201385% of its rating in Phase 3 \u2014 a condition where oil temperature rises noticeably and lubricant degradation accelerates. Korean operators baling through Phase 3 should check gearbox oil temperature by touch on the housing after 3\u20134 hours of Phase 3 baling; if the housing is too hot to hold comfortably, allow a cool-down period and consider a mid-session oil check.<\/p>\n<\/div>\n<\/details>\n

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\nQ6. What is the round baler application cost per bale for Japanese Nokyo cooperative rice straw operations using the 9YG-1.25A?<\/summary>\n
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The per-bale application cost for a Japanese Nokyo (agricultural cooperative) rice straw operation using the 9YG-1.25A is determined by dividing the total annual ownership cost \u2014 capital depreciation, net wrap, chain lubrication and maintenance parts, and allocated tractor fuel \u2014 by the total annual bale output across participating member farms. For a typical Nokyo cooperative in Niigata or Akita handling 100\u2013150 hectares of rice straw per season at 40\u201380 bales per hour, the annual bale output is approximately 1,500\u20133,000 bales. Dividing the annual ownership cost across this output gives a per-bale cost that is typically below the per-bale charge for contracted baling service, making cooperative ownership financially attractive. For a quote on the 9YG-1.25A for Japanese cooperative use, contact us through the inquiry form with details of your Nokyo’s total annual rice straw area and tractor specifications.<\/p>\n<\/div>\n<\/details>\n

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\nQ7. How does the raking step before baling affect the length of the optimal window for Korean rice straw in Gyeonggi-do?<\/summary>\n
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In Gyeonggi-do, where the rice baling window is constrained by earlier frost onset than in southern Korean provinces, raking on Day 1\u20132 after harvest can extend the effective productive Phase 2 baling window by 2\u20133 days compared to leaving the straw unraked. Raking lifts the flat, compacted rice straw mat off the paddy surface, increasing air circulation through the windrow and accelerating moisture loss by 30\u201350% under equivalent weather conditions. For a Gyeonggi-do rice farm facing an effective baling window of 10\u201312 days from mid-October to mid-November, adding 2\u20133 days to the Phase 2 productive window through early raking is a meaningful improvement \u2014 potentially the difference between completing all target area within Phase 2 conditions versus being forced into the lower-quality Phase 3 baling period with its higher moisture and more variable results.<\/p>\n<\/div>\n<\/details>\n

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\nQ8. Which round baler manufacturer provides documentation for both Korean RDA and Japanese JAMA machinery certification requirements?<\/summary>\n
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The 9YG series is manufactured under ISO 9001 quality management certification, which provides the manufacturing quality documentation foundation that both Korean RDA and Japanese JAMA certification processes reference. Our export team can provide the ISO 9001 manufacturing certificate, machine specification sheets, and safety compliance documentation in the formats required for Korean RDA type approval applications and for Japanese JAMA certification support requests. For buyers operating in both Korea and Japan \u2014 including Korean agricultural equipment trading companies supplying to Japanese Nokyo cooperatives \u2014 we can prepare a documentation package that supports certification processes in both markets from a single manufacturing quality management baseline. Contact us through the inquiry form with your certification timeline and requirements.<\/p>\n<\/div>\n<\/details>\n

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\nQ9. When should Korean rice farmers in Chungcheongnam-do start baling after harvest to avoid both wet-bale and frost-risk problems?<\/summary>\n
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For Chungcheongnam-do rice farmers, the ideal baling start is Day 3\u20134 after harvest under typical mid-October conditions \u2014 following an early raking on Day 1\u20132. This timing places the first baling pass at approximately 18\u201322% straw moisture, which is acceptable for Phase 2 baling and produces bales that will cure to stable storage condition within 7\u201310 days. Starting on Day 5\u20136 rather than Day 3\u20134 is acceptable in warm, dry October conditions when additional field drying is available, but risks coinciding with the first autumn rain events that typically begin appearing in late October in Chungcheong-do. The frost risk window begins to increase significantly after November 10\u201315 in most Chungcheong areas, meaning that all planned baling area should ideally be completed by this date to avoid the cold-weather drying problems and field access issues of late-window operation.<\/p>\n<\/div>\n<\/details>\n

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\nQ10. What is the round hay baler supplier cost advantage for Korean and Japanese operators buying directly versus through domestic distributors?<\/summary>\n
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The cost advantage of purchasing a round baler through direct export supply versus domestic distribution channels varies by market, but typically ranges from 10\u201325% of the machine base cost. Direct export purchases incur import customs duties, freight, and the buyer’s own import handling \u2014 but eliminate the domestic distributor margin that is embedded in the local market price. For Korean buyers, confirming that the direct-import purchase still qualifies for RDA subsidy through the buyer’s own application (rather than through a certified domestic distributor) requires pre-purchase verification with the local RDA office, since subsidy eligibility rules occasionally distinguish between distributor-sold and self-imported machinery. Contact us before purchasing to clarify both the cost advantage and the subsidy eligibility pathway for your specific province and purchase structure.<\/p>\n<\/div>\n<\/details>\n<\/div>\n<\/div>\n

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Rice Straw Baling \u2014 Japan and South Korea Season Guide A technical guide for Korean and Japanese rice straw operators explaining the optimal post-harvest baling window \u2014 covering regional harvest timing differences, moisture drying curves, weather risk windows, round baler machine selection for each phase, and the regulatory frameworks that constrain or incentivize rice straw […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[44],"tags":[],"class_list":["post-656","post","type-post","status-publish","format-standard","hentry","category-rice-straw-baling-guide"],"_links":{"self":[{"href":"https:\/\/farm-balers.com\/zh_tw\/wp-json\/wp\/v2\/posts\/656","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/farm-balers.com\/zh_tw\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/farm-balers.com\/zh_tw\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/farm-balers.com\/zh_tw\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/farm-balers.com\/zh_tw\/wp-json\/wp\/v2\/comments?post=656"}],"version-history":[{"count":1,"href":"https:\/\/farm-balers.com\/zh_tw\/wp-json\/wp\/v2\/posts\/656\/revisions"}],"predecessor-version":[{"id":660,"href":"https:\/\/farm-balers.com\/zh_tw\/wp-json\/wp\/v2\/posts\/656\/revisions\/660"}],"wp:attachment":[{"href":"https:\/\/farm-balers.com\/zh_tw\/wp-json\/wp\/v2\/media?parent=656"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/farm-balers.com\/zh_tw\/wp-json\/wp\/v2\/categories?post=656"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/farm-balers.com\/zh_tw\/wp-json\/wp\/v2\/tags?post=656"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}