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Estimating Yield

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Grain yield can be estimated prior to harvest.  Remember this is just an estimate as field conditions are rarely uniform. The general formula to estimate grain yield is:

For 7” row spacing:

Wheat: Grain yield (bu/acre) = (kernels per spike x spikes per 3 ft of row) x 0.0319

Barley: Grain yield (bu/acre) = (kernels per spike x spikes per 3 ft of row) x 0.0389

Oats: Grain yield (bu/acre) = (kernels per spike x spikes per 3 ft of row) x 0.0504

 

To adjust to other row spacing:

6 inch row width = multiply grain yield estimate by 1.17

7.5 inch row width = multiply grain yield estimate by 0.93

10 inch row width = multiply grain yield estimate by 0.70

12 inch row width = multiply grain yield estimate by 0.58

Source: The Small Grains Field Guide A-290, J.J. Wiersma and J.K. Ransom, 2005. Reviewed May 2017.