Effect of cultivation on the mineralization of nitrogen in soil |
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Authors: | D S Powlson |
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Institution: | (1) Rothamsted Experimental Station, AL5 2JQ Harpenden, Hertz, England |
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Abstract: | Summary The effect of cultivation (ploughing followed by rotavation) on the mineralization of soil nitrogen was measured at 2 sites on a silt loam soil. Both sites had a predominantly arable cropping history but one had been under grass for the previous 2 years and the other had carried wheat. Mineralization of N was slightly faster in cultivated soil but the difference was only significant at the site previously under grass. At this site cultivated soil contained 7 kg ha–1 more mineral N than uncultivated soil 2 weeks after treatment, and 9 kg ha–1 after 6 weeks. The corresponding figures for the site that had grown wheat were 4 and 6 kg N ha–1. |
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Keywords: | Cultivation Direct drilling Mineralization of nitrogen Ploughing |
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