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This article in AJ

  1. Vol. 59 No. 5, p. 420-423
     
    Received: Mar 2, 1967
    Published: Sept, 1967


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doi:10.2134/agronj1967.00021962005900050012x

Available Water in Soil as Influenced by Extraction of Soil Water by Plants1

  1. D. E. Miller2

Abstract

Abstract

Over a two-year period, a study was conducted to evaluate the influence of extraction of soil water by plants on the downward flow of water following irrigation and on the amount of water that may be considered as available to the plant. A conventional estimate of available water at an arbitrary time after irrigation may be increased by about 40% of the evapotranspiration that occurs between irrigation and sampling because of the influence of water extraction on downward flow. The data emphasize the lack of precision in the field capacity concept and that soil drainage following an irrigation does not usually become negligible within reasonable times after irrigation.

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