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Response of Subirrigated Hay Meadows to the Application of Nitrogen, Phosphorus, and Sulfur 1
Author(s) -
Rehm G. W.,
Moline W. J.,
Sorensen R. C.,
Burzlaff D. F.
Publication year - 1973
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1973.00021962006500040041x
Subject(s) - legume , hay , forage , agronomy , nutrient , phosphorus , composition (language) , nitrogen , chemistry , zoology , biology , linguistics , philosophy , organic chemistry
Hay production from subirrigated meadows is an important part of the economy of several states. Although fertilization with N and P had been researched in separate studies, little attention had been directed toward the interaction effect of these nutrients on forage production and the grass‐legume composition of these meadows. This study was designed to evaluate the effect of five rates of N, P and S on the yield and grass‐legume composition of subirrigated meadows. Forage yields were recorded and separations made to determine grass‐legume composition. Yields increased linearly with applied N while the response to P was curvilinear. There was no response to S. The percentage of grass in the meadows increased with applied N. Legume percentages increased with added P. Grass yields showed a linear increase with applied N and a curvilinear response to added P. Legume yields decreased linearly at low P rates when high rates of N were applied but increased curvilinearly as P rates were increased. Throughout the study, combinations of N and P produced the highest yields, thus demonstrating the importance of the combination of these two nutrients for maximum production from subirrigated hay meadows.