A MATHEMATICAL RELATIONSHIP BETWEEN NITROGEN INPUT AND OUTPUT IN CUT GRASS SWARDS |
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Authors: | J. S. Brockman C. M. Rope M. T. Stevens |
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Affiliation: | North Wyke Experimental Station, Okehampton, Devon |
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Abstract: | The importance of predicting grass N yield lies in its controlling influence on grass DM output and thus on animal production. Results from 88 experiments studying the use of fertilizer N on cut grass swards show that the major part (97%) of the variation in grass N yield could be explained in terms of fertilizer N rate, an estimate of soil N and an interaction between the two. From this, it appears that high fertilizer N recovery is associated with a high uptake of soil N and vice versa. |
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