Premium
Estimation of Asymptotic Rotation and Nitrogen Effects 1
Author(s) -
Fuller W. A.,
Cady F. B.
Publication year - 1965
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/agronj1965.00021962005700030025x
Subject(s) - rotation (mathematics) , limiting , nitrogen , agronomy , mathematics , human fertilization , crop rotation , exponential function , environmental science , nitrogen fertilizer , term (time) , chemistry , biology , physics , geometry , engineering , mathematical analysis , mechanical engineering , organic chemistry , crop , quantum mechanics
Synopsis Time rates of change in corn yields under nitrogen fertilization in a long term experiment are estimated. The experiment includes four rotations, each containing two years of corn and from zero to three years of meadow. Three levels of nitrogen are applied to the corn in each rotation. A model is presented which is characterized by the measuring of time in terms of rotation cycles and by the assumption of an exponential approach to a limiting value.