Extraction of nitrogen from soils |
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Authors: | R E Wheatley R MacDonald Angela M Smith |
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Institution: | (1) Scottish Crop Research Institute, DD2 5DA Invergowric, Dundee, UK |
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Abstract: | Summary A roller bed and rotary end-over-end shaker were compared for the extraction of mineral N from a variety of soil types; both were equally efficient with an optimum extraction time of 30 min. However, the roller bed permitted a greater operational capacity, a faster throughput of samples, and easier identification of sample bottles compared with the end-over-end shaker. More NH4
+-N and NO3
–-N (P<0.001) was recovered from soil by 2 M KCl than by any other extractant, in a soil: extractant ratio of 1 to 5 (w:v), except water, which was equally efficient at removing NO3
–-N from soils. |
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Keywords: | Nitrogen Ammonium Nitrate Nitrogen extraction Soils Nitrogen mineralization |
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