Calculating Yield

We use yield as our main measurement for responsiveness of crops to fertilizer treatments. Calculating yield can be complicated so we're providing a breakdown of how we use cooperator data and our measured data to determine final yield results. You will also find standard moisture and bushel weights for some common crops.

 

Equation Used:

Yield (bu/ac) = harvested dry matter (lbs) / crop standard wt (lbs/bu) / plot area (ac)

 

Calculations for final equation:                                      

harvested dry matter = [(100 - measured % moisture) * 0.01] * total harvest weight 

 

crop standard wt = [(100 - standard % moisture) * 0.01] * standard bushel weight

 

plot area = (plot width * plot length) / 43560 ft/ac


Standard Moisture and Weights for Common Crops

        CROP              STANDARD MOISTURE (%) STANDARD WEIGHT (BU/AC)
Wheat 13.5 60
Corn 15.5 56
Soybeans 13 60
Oats 14 32
Rye 14 56