Harvest and Storage CornSoybeanSmall Grain

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Harvest and StorageCorn/Soybean/Small Grain

• Paul E. Sumner
• Extension Engineer
• psumner_at_uga.edu
• 229-386-3684

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Watch Augers
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Measuring Field Losses
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Drying

• Rapid removal of moisture to storable level
• Requires large amounts of air
• Usually requires heat

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Aeration

• Cools grain
• Maintains uniform grain quality
• Prevents moisture migration
• Low airflow rate
• No heat required

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Moisture Content for Safe Storage (12 months)

• 12 months
• 11-12 for North Georgia
• 10-11 for South Georgia
• Over winter
• 15 if grain temp. held below 65o F

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In-Bin Drying
Wet Grain
Drying Front
Dry Grain
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Typical fan/dryer
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Methods of In-Bin Drying
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Layered Drying

• Drying one layer at a time (3-6 feet)
• Successive Layers should be thinner.
• Slow
• 25 cfm/ft2
• 90 to 110oF
• Not over 110o F for seed

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Batch-In-Bin

• Layers no more than 4 ft deep
• Move to another bin at 15-17
• Not over 110o F for seed
• 40 cfm/ft2
• 120 to 140oF

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Continuous/Batch dryers
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Continuous Flow Drying

• Thin Layers (2/3 - 11/2 ft)
• Continuous Loading and unloading
• 50 to 100 cfm/ft2
• 180 to 200oF
• Not over 140oF for market

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Stirring and Recirculating Devices
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Grain Spreader

• Level grain
• Distribute fines more evenly
• Fines should be screened if more than 5
• Fines promote air channeling and slow drying

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In-Bin Drying
No Grain Spreader
Wet Grain
Fines
Drying Front
Dry Grain
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In-Bin Drying
With Grain Spreader
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Selecting Drying Equipment

• Match Drier to Harvest Rate
• Time required for drying
• Type of grain
• Drying temperature
• Air flow rate
• Heat required

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RATE OF DRYING

• Moisture Content of Grain
• Temperature
• Humidity
• Volume of Drying Air
• Greater the Air Flow the Faster Drying

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STATIC AIR PRESSURE

• 1 to 1.5 inches Shelled Corn or of
  water Soybeans
• 1.5 to 2.5 inches Small Grains of water
• For Depths of 4 feet

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Fuel Cost for Drying Grain

• Fuel Cost (/bu)
• (BTU/lb of Water lb water remove/bu cost of
  fuel per unit 100)
• (BTU/unit of fuel burning efficiency ())

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Cost of Drying Corn per Bushel
Base on a Cross Flow Drying Model
Cost LP 1.25/gallon, 80oF Ambient, 55RH
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Cost of Drying Corn per Bushel
Base on a Cross Flow Drying Model
Cost LP 1.25/gallon, 80oF Ambient, 55RH
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Cost of Drying Corn per Bushel
Base on a Cross Flow Drying Model
Cost LP 1.25/gallon, 80oF Ambient, 55RH
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Cost of Drying vs. Airflow
Cost LP 1.25/gallon, 80oF Ambient, 55RH
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In-Storage Pest Control Drying vs Pesticides
Paul E. Sumner, Extension Agricultural Engineer
Steve Brown, Extension Entomologist Tifton,
Ga 229-386-3442 psumner_at_uga.edu
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Test Objectives

• Expose maize weevil contaminated corn samples of
  110, 140 and 180F in an oven from 0 to 24 hours
• Expose maize weevil contaminated corn samples of
  110, 140 and 180F in 8 cu. Ft. containers 0 to
  24 hours
• Determine adult weevil emergence

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Retrofitted Peanut Drying Wagon
5 hp Blueline Crop Dryer
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110, 140, 180F Replicated 4 times
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450 ml Samples Taken0, 15min, 30min, 1, 3, 6,
12, 24 hrs

• Samples cooled
• Sifted to remove adult weevils
• Placed in sealed plastic bags for three weeks

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