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Productivity index model comparison for selected soils in North Central United States

, : Productivity index model comparison for selected soils in North Central United States. Journal of Soil and Water Conservation 47(6): 491-494

The productivity index (PI) model is a derived measure of soil productivity. The basic assumption of the model is that crop yield is a function of root development, which in turn is controlled by the soil environment. The PI model in conjunction with estimated soil property values contained in the SCS Soil Interpretation Record (SIR) database are the basis of formulating predictions of long-term productivity changes by soil erosion in soil series.

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