Effects of Nitrapyrin on Nitrate Movement in Soil Columns1
- L. B. Owens2
The purpose of the study was to consider the possible benefits of a nitrification inhibitor to control nitrate leaching in soils. Sandy loam soil cores were taken in 1-m-long polyvinyl chloride cylinders. After prewetting the cores, nitrapyrin (a nitrification inhibitor)-treated urea was incorporated into the top 10 cm of three cores, and untreated urea was incorporated into the top 10 cm of three cores. The columns were leached periodically with distilled water. After 91 days, 1 and 9.7% of the applied N had leached from the nitrapyrin-treated and untreated cores, respectively; after 144 days, 41.9 and 53.0%, respectively, of applied N had been leached. Short-term studies indicated that further work using a nitrification inhibitor to reduce nonpoint source nitrate additions to ground water is justified.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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