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Reducing Harvest Losses Combine Calibration. John Nowatzki Extension Ag Machine Systems Specialist North Dakota State University. Keeping Harvest Losses Low. Where Losses Occur How to Measure Losses Yield Monitor Calibration Machine Adjustments (Dealers). Where Do Losses Occur?. - PowerPoint PPT Presentation
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04/22/23 1
Reducing Harvest LossesCombine Calibration
John NowatzkiExtension Ag Machine Systems SpecialistNorth Dakota State University
204/22/23
Keeping Harvest Losses Low Where Losses Occur How to Measure Losses Yield Monitor Calibration Machine Adjustments (Dealers)
304/22/23
Where Do Losses Occur? Pre-harvest loss
Uncontrollable by Operator Header loss Combine cylinder loss Combine separation loss
404/22/23
How Are Losses Measured? Pre-harvest Loss
Header Loss
Threshing and Separation Loss
Total Loss
504/22/23
Seeds per Sq. Ft. = Loss per AcresCanola: 4 seeds = 1 pound per acreWheat: 16 seeds = 1 bushel Barley: 15 seeds = 1 bushel Soybeans: 4 seeds = 1 bushel Corn: 2 seeds = 1 bushelOats: 9 seeds = 1 bushel
150,000 seeds per lb.150,000/43,560 = 3.5/sq. ft. for 1 lb.
Wheat 700,000Barley 650,000Oats 400,000Soybeans 150,000Corn 80,000
604/22/23
Pre-harvest LossPre-harvest Loss – Count Seeds before Combining
60 seeds per sq. ft.60/4 = 15 lbs. loss
Header Losses Back up Combine Several Feet
Count Seeds on Ground (200 per sq. ft.) Subtract Pre-harvest (60 seeds) 200 – 60 = 140) Account for Swather Width (140 / 5 = 28 per sq.
ft.) (28 seeds / 4 = 7 lbs. per acre)
704/22/23
Swather – 30’
Swath – 6’
30’ / 6’ = 5
Seeds behind Combine (400 per sq. ft.) Subtract Pre-harvest (60 seeds) 400 – 60 = 340) Account for Swather Width (340 / 5 = 68 per sq.
ft.) (68 seeds / 4 = 17 lbs. per acre) (30’ swather)
804/22/23
Threshing and Separation Losses
Pre-harvest 15 lbs.Header 7 lbs.Threshing 17 lbs.Total 39 lbs.
904/22/23
Yield Monitoring – Field Crops Quantity
Volumetric – Grain Pile Measured with a Light Beam Impact-plate – Grain Impact Electronically Sensed
Moisture - Measures Electrical Capacitance GPS - Records to Locations on Field Map
1004/22/23
Yield Monitor Calibration Harvest “Loads” from a Range of Yields
50 – 100 bushels
Weigh Loads Separately
Enter Actual Weight into Yield Monitor
1104/22/23
More Information John Nowatzki
Extension Ag Machine Systems SpecialistNorth Dakota State University
Telephone: 701-231-8213
Email: John.Nowatzki@ndsu.edu
http://www.ag.ndsu.edu/agmachinery
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