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Formula for Estimating Barley Yields
These formulas work only if the crop has reasonable seed size - seeds are not small because of drought, etc.
Count the number of spikes in a 3 ft. row. Then sample five or six spikes in the row an count the number of seeds per spike. Then use the following formula:
For Six Row Barley:
Bushels/acre = (Spikes/three ft row X average number kernels per spike X
0.2723
row spacing (inches)
As an example, if you counted an average 70 spikes in three feet of row with a 7 inch row spacing, and 33 kernels per spike on average, then the estimated yield for this area of the field would be: (70 spikes/three ft row X 33 kernels per spike X 0.272)(divided by) 7 inch row = 89.8 bushels per acre.
For Two Row Barley (assuming Conlon, if for
Rawson, use 0.40 in the equation below:
Bushels/acre = (Spikes/three ft row X average number kernels per spike X
0.35)
row spacing (inches)
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