Soil Nitrate-nitrogen Determined by Coring and Solution Extraction Techniques1
- E. E. Alberts,
- R. E. Burwell and
- G. E. Schuman2
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.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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