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This article in SSSAJ

  1. Vol. 57 No. 5, p. 1208-1211
     
    Received: Aug 28, 1992


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doi:10.2136/sssaj1993.03615995005700050008x

Evaluating Nitrate Recovery by Ion-Exchange Resin Bags

  1. L. J. Wyland  and
  2. L. E. Jackson
  1. USDA Agric. Res. Stn., 1636 E. Alisal St., Salinas, CA 93905

Abstract

Abstract

Ion-exchange resin (IER) bags were tested as traps for leached soil NO3-N. In laboratory experiments, IER bags recovered 84.7% of the NO3-N from solutions containing 0.09 to 40.74 g NO3-N kg−1 resin, but recovery decreased at higher concentrations. In soil columns, NO3-N recovery was poor (36.2%) when NO3-N moved slowly through the soil profile after a rapid single pulse, but improved (87.1%) when higher flow was sustained. In the field, estimates of leached NO3-N using IER bags fell within the range of values estimated from soil cores and suction lysimeters. Advantages of IER bags are attributed to cumulative recovery of NO3-N during passive interception of gravitational water flow.

Contribution of the Dep. of Vegetable Crops, Univ. of California, Davis, CA 95616.

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