ABSTRACTA comprehensive mathematical watershed model containing a complete soil moisture accounting system was used to simulate the hydrologic processes measured in one of the weighing lysimeters at Coshocton, Ohio. Data from a four‐year rotation were used to calibrate the parameters initially selected for the model. Data from the succeeding four years were used to evaluate the predictions. Reasonable agreement was obtained between observed and predicted percolation and evapo‐transpiration val
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