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This article in JEQ

  1. Vol. 13 No. 2, p. 274-278
     
    Received: Feb 28, 1983


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doi:10.2134/jeq1984.00472425001300020020x

Potential Aquifer Pollution from Nitrate Leaching Following the Plowing of Temporary Grassland1

  1. K. C. Cameron and
  2. A. Wild2

Abstract

Abstract

An investigation of the amounts and concentrations of nitrate released following the plowing of temporary grassland confirmed that, potentially at least, this practice forms a major source of NO3-N pollution of aquifers. Direct measurements of changes in profile NO3-N distributions at two sites show that a total of up to about 100 kg N ha−1 was leached over two winters after fall mineralization following plowing. Solution nitrate concentrations were in excess of the World Health Organization limits for drinking water. The amount of N mineralized was related to the total soil N. The average rate of leaching through the Chalk soils studied in southern England was about 1 m/yr.

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