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Soil Science Society of America Journal Abstract -

Model for Estimating Soil Water, Plant, and Atmospheric Interrelations: II. Field Test of Model1


This article in SSSAJ

  1. Vol. 37 No. 4, p. 528-532
    Received: Oct 9, 1972
    Accepted: Mar 6, 1973

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  1. M. N. Nimah and
  2. R. J. Hanks2



A mathematical model was developed to predict water content profiles, evapotranspiration, water flow from or to the water table, root extraction, and root water potential at the surface under transient conditions.

The model was field tested in 1970 and 1971. With alfalfa (Medicago sativa L.) as the crop, predicted and computed water content-depth profiles show best agreement 48 hours after any water addition. The poorest agreement for all crops tested was right after irrigation.

The computed cumulative upward water flow from the water table was 4.80 cm as compared to 0.0 cm measured for the whole 1971 season of 116 days.

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