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 of a productivity calculation where miscellanenous physical factors are present: 
MR 
x ADepth 
x SA 
x SD 
= PR 
61.5 
x 1.00 
x .095 
x 0.750 
= 43.82 
The actual calculation of the productivity rating on this specific profile is as follows:
MR 
x ADepth 
= PR 
61.5 
x 0.9 
= 55.35 
