1. 5/12/20151 Reducing Harvest Losses Combine Calibration John Nowatzki Extension Ag Machine Systems Specialist North Dakota State University

2. 25/12/2015 Keeping Harvest Losses Low Where Losses Occur How to Measure Losses Yield Monitor Calibration Machine Adjustments (Dealers)

3. 35/12/2015 Where Do Losses Occur? Pre-harvest loss  Uncontrollable by Operator Header loss Combine cylinder loss Combine separation loss

4. 45/12/2015 How Are Losses Measured? Pre-harvest Loss Header Loss Threshing and Separation Loss Total Loss

5. 55/12/2015 Seeds per Sq. Ft. = Loss per Acres Canola: 4 seeds = 1 pound per acre Wheat:16 seeds = 1 bushel Barley: 15 seeds = 1 bushel Soybeans: 4 seeds = 1 bushel Corn: 2 seeds = 1 bushel Oats: 9 seeds = 1 bushel 150,000 seeds per lb. 150,000/43,560 = 3.5/sq. ft. for 1 lb. Wheat 700,000 Barley 650,000 Oats 400,000 Soybeans 150,000 Corn 80,000

6. 65/12/2015 Pre-harvest Loss Pre-harvest Loss – Count Seeds before Combining 60 seeds per sq. ft. 60/4 = 15 lbs. loss

7. 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) 75/12/2015 Swather – 30’ Swath – 6’ 30’ / 6’ = 5

8. 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) 85/12/2015 Threshing and Separation Losses Pre-harvest 15 lbs. Header 7 lbs. Threshing 17 lbs. Total 39 lbs.

9. 95/12/2015 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

10. 105/12/2015 Yield Monitor Calibration Harvest “Loads” from a Range of Yields  50 – 100 bushels Weigh Loads Separately Enter Actual Weight into Yield Monitor

11. 115/12/2015 More Information John Nowatzki Extension Ag Machine Systems Specialist North Dakota State University Telephone: 701-231-8213 Email: John.Nowatzki@ndsu.edu http://www.ag.ndsu.edu/agmachinery