Corn stover harvesting and densification
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Corn Stover Harvesting and Densification Iowa State University Department of Agricultural and Biosystems Engineering Tom Tuetken, Research Assistant Goals and Objectives To design and build a new corn stover harvest and transport system capable of the following:

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Corn stover harvesting and densification l.jpg

Corn Stover Harvesting and Densification

Iowa State University

Department of Agricultural and Biosystems Engineering

Tom Tuetken, Research Assistant


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Goals and Objectives

  • To design and build a new corn stover harvest and transport system capable of the following:

    • Harvest stover at any moisture level while simultaneously harvesting the grain and separating the two streams of materials

    • Maximize the density of the stover for economical transportation



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Current Stover Collection Methods

  • Forage Harvesting

    • No Separation of Grain

    • High Grain Damage

  • Baling

    • Dirt Collection

    • Rock Collection

    • Undesirable Use of Plastic Twine

    • 2nd Pass Operation


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Current Stover Collection

  • Stakhand

    • Little Cob Collection

    • High Dirt Collection

    • 2nd Pass Operation


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Systems Developed

  • Two-Tier Corn Head

    • Mounted on Prototype “Bass” Plot Combine

    • Utilizes Geringhoff Row Units

    • Corn, Cob,Stalks Separated and Collected


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Transport System for Bass Combine

  • 32 Foot Transport Trailer

    • 15 Ton Overall Capacity

    • Able to Press Material to Achieve Higher Density

  • Towed by 3185 JCB Fastrac

    • Capable of 45 mph

    • 4 Wheel Drive With Full Suspension and Brakes


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Combined Systems Developed

  • International Harvester 1460 Axial Flow Combine with Row Bean Head

    • Collects the Whole Plant

    • Harvests and Separates Grain From Stover

  • Stover Conveyed to Hesston Stakhand 10

    • Density of Stover Increased

    • Dirt Free Collection


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Alternative Systems Developed

  • Used with “Stover Caddy”

    • Collects All Material From Rear of Combine

    • Uses Forage Blower to Convey Into Wagon

  • John Deere 9750 STS Combine

    • 8-Row Corn Head

    • 6-Row Bean Head


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Fall 2001 Initial Test Results

  • IH 1460 Combine with Hesston Stakhand

    • Testing Near Biomass Energy Conversion Facility(BECON), Nevada, IA

      • Stack Density Average of 9.2 lb/ft3

      • Corn Yield Average of 186 bu/acre (10788 lb/acre)

      • Stover Yield Average of 9057 lb/acre


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Fall 2001 Initial Test Results

  • October 29th Field Demonstration in Harlan, Iowa

    • Equipment Demonstrated:

      • IH 1460 and Hesston Stakhand

      • Modified Bass Plot Harvester

      • John Deere STS 9650 with “Stover Caddy”

      • Hesston 4 x 3 Giant Square Baler 4910



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Conclusions

  • One-Step Crop Harvesting Possible

    • Harvest and Separation of Grain and Stover Achieved

    • Need for Increased Capacity

    • Grain/Stover Loading Rate Must Be Realized

  • Densification of Stover

    • Development of Improved Methods Essential to Get Heavier Loads

    • Improved Stalk Cut Uniformity Desirable



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