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A MATHEMATICAL RELATIONSHIP BETWEEN NITROGEN INPUT AND OUTPUT IN CUT GRASS SWARDS
Author(s) -
Brockman J. S.,
Rope C. M.,
Stevens M. T.
Publication year - 1971
Publication title -
grass and forage science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.716
H-Index - 56
eISSN - 1365-2494
pISSN - 0142-5242
DOI - 10.1111/j.1365-2494.1971.tb00638.x
Subject(s) - yield (engineering) , fertilizer , nitrogen , agronomy , production (economics) , environmental science , versa , nitrogen fertilizer , mathematics , biology , chemistry , economics , computer science , materials science , macroeconomics , organic chemistry , database , metallurgy
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.