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 A-Depth x Phys Factors1 = Productivity Rating
1Physical Factors = factor 1 x factor 2 x factor 3


Example of a productivity calculation where miscellanenous physical factors are present:
MR x A-Depth 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 A-Depth = PR
61.5 x 0.9 = 55.35
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