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Garden with Insight v1.0 Help: Soil patch next day functions: calculate equilbrium flow between active and stable mineral P

Equilibrium flow between active (loosely bound) and stable (tightly bound) mineral P in the soil is based on the simple observation that there is usually about four times as much stable as active mineral P in the soil. Flow towards the equilibrium is limited by a flow rate coefficient based on the phosphorus sorption coefficient (PSP). As with labile-active mineral P flow, reverse flow -- from stable to active mineral P -- is reduced to 10% of calculated flow to account for low solubility.

calculation of labile-active mineral P flow
EPIC Mineral P Cycling
Model contents

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Updated: May 4, 1998. Questions/comments on site to
Copyright © 1998 Paul D. Fernhout & Cynthia F. Kurtz.