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This article in AJ

  1. Vol. 62 No. 1, p. 48-51
    Received: June 11, 1969

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Water Storage and Drainage under a Row Crop on a Sandy Soil1

  1. T. A. Black,
  2. W. R. Gardner and
  3. C. B. Tanner2



Drainage from the root zone of snap beans grown on a sandy soil was measured by a lysimeter, and calculated from Darcy's law, and by a hydrologic balance equation. At the end of a 60-day period the Darcy's law calculation gave a 11% higher estimate of the cumulative drainage than the other two methods. Of the 32 cm of precipitation and decrease of 3 cm in water storage from emergence to harvest, evapotranspiration accounted for 17 cm, and drainage for 18 cm. A useful estimate of the drainage from the root zone in sandy soil was obtained from the space averaged capillary conductivity of the soil in which rooting occurred.

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