PR = Productivity Rating
The actual physical productivity of the soil after all factors that are influencing the productivity have been taken into account. The productivity rating is calculated as follows:
MR x ADepth x Phys Factors^{1} = Productivity Rating
^{1}Physical Factors = factor 1 x factor 2 x factor 3
Example:
MR 
x ADepth 
x SA 
x SD 
= PR 
56 
x 1.00 
x .96 
x .80 
= 43.01 rounded to 43 
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