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This article in SSSAJ

  1. Vol. 41 No. 1, p. 90-92
     
    Received: Apr 12, 1976
    Published: Jan, 1977


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doi:10.2136/sssaj1977.03615995004100010027x

Soil Nitrate-nitrogen Determined by Coring and Solution Extraction Techniques1

  1. E. E. Alberts,
  2. R. E. Burwell and
  3. G. E. Schuman2

Abstract

Abstract

Soil-coring and solution-extraction sampling techniques were compared for determining the content of NO3-N in the soil profile of a Monona silt loam (Typic Hapludoll) in southwestern Iowa. The NO3-N content of the 3.05-m profile, determined by solution extraction, was 28% lower in 1972, 8% higher in 1973, and 13% lower in 1974 than that determined by soil coring. The profile difference in NO3-N content between the two sampling techniques was insignificant in 1973 and 1974 but was highly significant (1%) in 1972.

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