Response of Recent Acala Cotton Varieties to Variable Nitrogen Rates in the San Joaquin Valley of California
R. B. Hutmachera,
R. L. Travis*,b,
D. W. Rainsb,
R. N. Vargasc,
B. A. Robertsc,
B. L. Weirc,
S. D. Wrightc,
D. S. Munkc,
B. H. Marshc,
M. P. Keeleyd,
F. B. Fritschie,
D. J. Munierc,
R. L. Nicholsf and
R. Delgadog
a Univ. of California Coop. Ext., Shafter, CA, and Univ. of California, Davis, CA
b Dep. of Agron. and Range Sci., 1 Shields Ave., Univ. of California, Davis, CA 95616
c Univ. of California, Madera, Kings, Merced, Tulare, Fresno, Kern, and Glenn Counties, respectively
d Univ. of California, Shafter, CA
e Dep. of Agron. and Range Sci., Univ. of California, Davis, CA (currently USDA, Stoneville, MS)
f Cotton Inc., Cary, NC
g Univ. of California, Shafter, CA

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Fig. 1. Lint yield as a function of residual soil NO3N (top 0.6 m of soil profile) plus applied N for all sites and years from 1996 to 2000. Curve fit is second-order polynomial. r2 = 0.328.
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Copyright © 2004 by the American Society of Agronomy.