{"id":603,"date":"2026-05-25T08:45:00","date_gmt":"2026-05-25T08:45:00","guid":{"rendered":"https:\/\/rock-crusher-tractor.com\/?p=603"},"modified":"2026-05-25T08:45:00","modified_gmt":"2026-05-25T08:45:00","slug":"psw-3200-b-rotavator-fertilizer-bunker-korea-guide","status":"publish","type":"post","link":"https:\/\/rock-crusher-tractor.com\/de\/psw-3200-b-rotavator-fertilizer-bunker-korea-guide\/","title":{"rendered":"PSW-3200 Rotavator Modell B \u2013 Vollst\u00e4ndiger Leitfaden f\u00fcr den D\u00fcngerbunker"},"content":{"rendered":"
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PSW-3200 Rotavator B Model \u2014 Combining Tillage and Base Fertilization in One Pass<\/h1>\n

The PSW-3200 Model B integrates a 2,000 Kg granular fertilizer bunker into the rotavator body \u2014 combining the tillage pass (Step 2) and base fertilizer distribution (Step 4) into a single tractor operation. When the compressed Korean highland spring calendar makes every field pass count, this combination changes the preparation logistics.<\/p>\n

Discuss PSW-3200 B for Your Operation<\/a><\/p>\n<\/div>\n<\/div>\n

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Die Watanabe PSW-3200 Rotavator<\/a> range includes two major configurations. The Standard model performs the tillage function alone \u2014 creating the fine-tilth seedbed that furrowing and planting depend on. The Model B adds a 2,000 Kg integrated granular fertilizer bunker to the rotavator body, simultaneously distributing base fertilizer into the tillage depth as the rotor processes the soil. This combination converts two separate field operations \u2014 Steps 2 and 4 in the Watanabe 7-step potato system \u2014 into a single pass.<\/p>\n

The decision between the Standard PSW-3200 and the Model B is a logistics calculation specific to each Korean farm’s spring preparation calendar. This guide provides that calculation framework, explains the mechanical details of how the B model’s integrated fertilizer system works, and identifies the Korean potato production scenarios where the Model B’s pass-reduction advantage outweighs the separate EP-ADB fertilizer applicator approach \u2014 and where it does not.<\/p>\n

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PSW-3200 Standard vs Model B \u2014 Complete Comparison<\/h2>\n

\"PSW-3200<\/p>\n

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TILLAGE ONLY<\/div>\n

PSW-3200 Standard<\/p>\n

140 HP \u00b7 3.0\u20133.6 m \u00b7 Cat.2 \u00b7 540\/1000 RPM<\/p>\n

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  • \u2192<\/span>Tillage only \u2014 Steps 2<\/li>\n
  • \u2192<\/span>Separate EP-ADB pass for Step 4<\/li>\n
  • \u2192<\/span>Lighter machine weight<\/li>\n
  • \u2192<\/span>Fertilizer placed at furrowing (better row concentration)<\/li>\n
  • \u2192<\/span>Lower initial purchase cost<\/li>\n<\/ul>\n<\/div>\n
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    TILLAGE + FERTILIZER<\/div>\n

    PSW-3200 Model B<\/p>\n

    140 HP \u00b7 3.0\u20133.6 m \u00b7 2,000 Kg fertilizer bunker<\/p>\n

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    • \u2713<\/span>Steps 2 + 4 combined in one pass<\/li>\n
    • \u2713<\/span>No separate EP-ADB field pass needed<\/li>\n
    • \u2713<\/span>2,000 Kg bunker \u2014 fewer refill stops<\/li>\n
    • \u2713<\/span>Saves 1 tractor pass (fuel + time) per season<\/li>\n
    • \u2713<\/span>Fertilizer incorporated at full tillage depth uniformly<\/li>\n<\/ul>\n<\/div>\n<\/div>\n

      <\/p>\n

      How the Model B Works \u2014 Fertilizer Integration Mechanism<\/h2>\n

      \"PSW-3200<\/p>\n

      The PSW-3200 Model B integrates fertilizer distribution through a gravity-feed metering system mounted above the rotavator’s rotor housing. As the rotor blades till the soil and the tractor advances, the metering system releases granular fertilizer through distribution tubes that direct the granules into the actively tilling rotor zone \u2014 where the rotating blades immediately incorporate the fertilizer into the loosened soil mass.<\/p>\n

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      1<\/div>\n
      Fertilizer stored in the 2,000 Kg top-mounted bunker.<\/strong> The bunker is positioned on top of the rotavator housing, balanced for stable three-point hitch operation. At 600\u2013700 Kg\/ha typical application rate, the 2,000 Kg bunker covers 3\u20133.5 ha before a refill stop is needed \u2014 significantly reducing refill interruptions compared to per-row bunkers on the EP-ADB applicator at the furrowing stage.<\/div>\n<\/div>\n
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      2<\/div>\n
      Metering aperture controls application rate.<\/strong> Adjustable metering apertures determine the flow rate of granular fertilizer from the bunker into the distribution tubes. Application rate is calibrated before field use by running the metering system over a collection tray and weighing the output against the target application rate per unit area. The calibration accounts for granule size and density of the specific fertilizer product being used.<\/div>\n<\/div>\n
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      3<\/div>\n
      Rotor immediately incorporates fertilizer into the tillage depth.<\/strong> Unlike broadcast fertilizer applied before tillage (which sits on the surface until the rotor incorporates it), or EP-ADB fertilizer applied at furrowing (placed in the row zone only), the Model B’s fertilizer is incorporated by the rotor blades throughout the full tillage depth of 25\u201330 cm. The fertilizer is distributed through the entire tilled soil volume \u2014 not concentrated in the row zone as with EP-ADB application.<\/div>\n<\/div>\n<\/div>\n

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      Agronomic Comparison \u2014 Model B vs Separate EP-ADB<\/h2>\n

      \"PSW-3200<\/p>\n

      The fundamental agronomic difference between Model B (fertilizer at tillage) and the Standard + EP-ADB approach (fertilizer at furrowing) is fertilizer placement depth and distribution pattern:<\/p>\n

      \n\n\n\n\n\n\n\n\n\n\n\n
      Faktor<\/th>\nPSW-3200 Model B<\/th>\nStandard + EP-ADB<\/th>\n<\/tr>\n<\/thead>\n
      Fertilizer placement<\/td>\nThroughout tillage depth (25\u201330 cm), full bed width<\/td>\nRow zone only \u2014 maximum root availability<\/td>\n<\/tr>\n
      Potassium availability<\/td>\nUniform bed \u2014 roots reach K throughout the bed<\/td>\nRow-concentrated \u2014 highest early-season K availability<\/td>\n<\/tr>\n
      Field passes<\/td>\n1 pass (Steps 2+4 combined)<\/td>\n2 passes (Step 2 rotavator + Step 4 EP-ADB)<\/td>\n<\/tr>\n
      Bunkerkapazit\u00e4t<\/td>\n2,000 Kg \u2014 covers 3\u20133.5 ha per fill<\/td>\nSmaller per-row bunkers \u2014 more refill stops<\/td>\n<\/tr>\n
      Runoff risk (sloped fields)<\/td>\nFertilizer incorporated immediately \u2014 low runoff risk<\/td>\nIncorporated at furrowing \u2014 similar low runoff risk<\/td>\n<\/tr>\n
      Equipment cost<\/td>\nHigher (bunker system included)<\/td>\nLower PSW-3200 + separate EP-ADB cost<\/td>\n<\/tr>\n
      Am besten geeignet f\u00fcr<\/td>\nTime-compressed spring; single tractor operations<\/td>\nTwo-tractor operations; low-K soils; precision row placement<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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      When the Model B Saves Time \u2014 The Pass Reduction Advantage<\/h2>\n

      The Model B’s primary advantage is operational: one fewer field pass in the spring preparation sequence. In Korean highland potato production where the preparation window is compressed to 2\u20133 weeks, each eliminated field pass reduces both calendar pressure and total operating cost (fuel, tractor hours, operator time). The pass reduction is most valuable in these scenarios:<\/p>\n

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      \u2705<\/span><\/p>\n

      Single-tractor operations.<\/strong> When the farm operates only one tractor, the Standard PSW-3200 and the EP-ADB must use the same tractor on separate days (rotavator tillage, then change to the furrower with applicator). The Model B performs both in a single day’s work \u2014 the tractor is freed earlier for furrowing and planting.<\/p>\n<\/div>\n

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      \u2705<\/span><\/p>\n

      Large farm areas (15+ ha) where passing time compounds.<\/strong> Each field pass on a 15 ha farm takes approximately 2 working days for the PSW-3200 at normal tillage speed. Eliminating one pass saves 2 days \u2014 which at the peak of the spring preparation window can make the difference between completing preparation before the planting date or falling behind the frost calendar.<\/p>\n<\/div>\n

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      \u2705<\/span><\/p>\n

      Soils where uniform fertilizer distribution across the bed is adequate.<\/strong> On Korean highland soils with moderate natural potassium content (above 150 mg\/kg exchangeable K from soil test), full-bed fertilizer incorporation via the Model B is agronomically adequate \u2014 the potassium is distributed throughout the tillage zone accessible to roots during the critical bulking phase. On soils with very low K (below 100 mg\/kg), row-concentrated EP-ADB placement at the furrowing step provides a precision advantage over the Model B’s uniform bed distribution.<\/p>\n<\/div>\n

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      \u2717<\/span><\/p>\n

      Not advantageous when soil K is very low.<\/strong> The EP-ADB approach (separate pass, row-placed K at furrowing) is agronomically superior when soil test K is very low \u2014 the row-concentrated potassium provides higher early-season K availability than the Model B’s uniform bed distribution at the same total application rate. On documented low-K Gangwon-do highland soils, the separate EP-ADB approach may produce better tuber K nutrition than the Model B, and the pass reduction advantage is outweighed by the placement quality difference.<\/p>\n<\/div>\n<\/div>\n

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      PSW-3200 Model B Operation \u2014 Speed, Calibration, and Bunker Management<\/h2>\n

      PTO Speed Setting \u2014 1000 RPM for Potato<\/h3>\n

      The PSW-3200 supports both 540 RPM and 1000 RPM PTO input. For Korean highland potato seedbed preparation, 1000 RPM is the preferred setting regardless of whether the Standard or Model B is being used. Higher rotor tip speed at 1000 RPM produces finer soil particle size that supports uniform ridge formation at the furrowing step, consistent planting depth at the planting step, and better soil-fertilizer mixing in the Model B configuration. The 540 RPM setting is reserved for situations where the soil is already fine-textured and aggressive fragmentation would produce excessive dust or over-worked seedbed \u2014 uncommon in Korean highland granite-derived soils that benefit from thorough fragmentation.<\/p>\n

      Bunker Calibration \u2014 Critical Before Each Season<\/h3>\n
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      Step-by-step calibration procedure for PSW-3200 B:<\/p>\n

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      1<\/span>Place a tarpaulin or collection bag beneath the fertilizer distribution outlets with the machine stationary.<\/div>\n
      2<\/span>Mark the ground drive connection (the component that drives the metering mechanism from ground wheel or PTO). Run the mechanism for exactly 1 minute at the working forward speed \u2014 4 km\/h for typical Korean highland potato tillage.<\/div>\n
      3<\/span>Weigh the collected fertilizer. Calculate the output per minute and convert to kg\/ha using: (output per minute \u00d7 60) \u00f7 (working speed km\/h \u00d7 working width m \u00d7 0.1) = kg\/ha.<\/div>\n
      4<\/span>Compare calculated output to your soil test-derived target application rate. Adjust the metering aperture up or down and repeat until the output matches the target rate. Recalibrate whenever fertilizer product changes.<\/div>\n<\/div>\n<\/div>\n

      Bunker Refill Logistics<\/h3>\n

      The 2,000 Kg bunker capacity is the Model B’s operational advantage over small per-row bunkers on the EP-ADB \u2014 but it requires planning the refill logistics before the field operation begins. At a typical Korean highland potato base fertilizer rate of 500\u2013800 Kg\/ha (compound NPK), the 2,000 Kg bunker covers approximately 2.5\u20134 ha before requiring a refill. For a 15 ha operation, the operator will refill the bunker approximately 4\u20136 times during the rotavator pass. Each refill from a field-edge bulk bag (500 Kg jumbo bag) takes 15\u201320 minutes with a front loader or telehandler. Pre-position refill bulk bags at the field headland before beginning the tillage day to minimize refill stop time.<\/p>\n

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      PSW-3200 B in the 7-Step System \u2014 What It Changes<\/h2>\n

      \"Stone<\/p>\n

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      7-Step System \u2014 PSW-3200 Standard<\/p>\n

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      \u2460 Stone clearance<\/div>\n
      \u2461 Rotavator tillage (PSW-3200 standard \u2014 tillage only)<\/div>\n
      \u2462 Furrowing (EP-R-380\/580)<\/div>\n
      \u2463 Base fertilizer (EP-ADB \u2014 separate pass)<\/div>\n
      \u2464 Planting \u2465 Cultivation \u2466 Harvest<\/div>\n<\/div>\n

      Gesamt: 5 pre-planting passes<\/strong><\/p>\n<\/div>\n

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      7-Step System \u2014 PSW-3200 Model B<\/p>\n

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      \u2460 Stone clearance<\/div>\n
      \u2461 + \u2463 Rotavator + fertilizer (PSW-3200 B \u2014 COMBINED)<\/div>\n
      \u2462 Furrowing (EP-R-380\/580 \u2014 no separate fertilizer pass)<\/div>\n
      \u2464 Planting \u2465 Cultivation \u2466 Harvest<\/div>\n<\/div>\n

      Gesamt: 4 pre-planting passes<\/strong> \u2014 1 fewer pass saved<\/p>\n<\/div>\n<\/div>\n

      Practical Operating Notes \u2014 Getting Consistent Results with the PSW-3200 B<\/h2>\n

      Working Speed and Tillage Depth<\/h3>\n

      The PSW-3200 B at 1000 RPM and the recommended 2\u20134 km\/h forward speed produces a uniform fine tilth appropriate for Korean highland potato and vegetable seedbed requirements. Operating too fast (above 4 km\/h) produces coarser particle size and leaves larger clods that compromise ridge formation quality at the furrowing step. On initial spring tillage of soil that has been fallow through winter, a slower first pass (2\u20133 km\/h) produces better fragmentation of compacted clod structure before the second pass at the full production speed.<\/p>\n

      Tillage depth should be confirmed at the season start by measuring the actual depth of disturbance with a probe in the tilled zone after the first pass. Target depth: 22\u201328 cm for Korean highland potato. Shallower tillage (below 18 cm) risks leaving the base fertilizer distributed by the Model B’s bunker system above the root zone where it is most needed; deeper tillage (above 30 cm) risks bringing subsoil material to the surface, particularly on shallow Taebaek mountain soils where bedrock or fragmented rock begins at 35\u201340 cm.<\/p>\n

      Blade Wear Inspection<\/h3>\n

      The PSW-3200’s rotavator blades \u2014 high-chromium alloy steel with hardened cutting edges \u2014 wear progressively during Korean highland granite soil operation. Inspect blade wear at the end of each operating day during heavy-use periods. Indicators of blade replacement need: tip shortening to below 60% of original blade length; visible chipping or cracking of the cutting edge; asymmetric wear (one side wearing faster, indicating possible tractor hitch misalignment). Replacement blades are available from Korea Watanabe with next-day domestic dispatch. Carry one full set of replacement blades on site for any operation spanning multiple days \u2014 mid-operation blade change is common on Gangwon-do highland granite soils and takes 30\u201360 minutes with the correct tools.<\/p>\n

      Model B Maintenance \u2014 Fertilizer System<\/h3>\n

      The PSW-3200 B’s fertilizer distribution system requires specific maintenance beyond the standard rotavator service:<\/p>\n