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Tillage and Nitrogen Application Impact on Cotton following Wheat
Author(s) -
Wiatrak P. J.,
Wright D. L.,
Marois J. J.,
Koziara W.,
Pudelko J. A.
Publication year - 2005
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/agronj2005.0288
Subject(s) - lint , tillage , agronomy , yield (engineering) , mathematics , human fertilization , biology , physics , thermodynamics
Tillage and N fertilization influence cotton ( Gosspium hirsutum L.) growth and yield. The objective of the study was to evaluate the influence of two tillage systems (conventional tillage [CT] and strip‐till [ST]) and four N rates (0, 67, 134, and 202 kg N ha −1 ) on growth, development, and yield of ‘DP 5409’ cotton following wheat ( Triticum aestivum L.). The experiment was conducted at the University of Florida's North Florida Research and Education Center in Quincy, FL, in 1995–1997. Lint yields, plant height, boll no. plant −1 , and boll no. m −2 varied across years. With every 1 kg N ha −1 applied to cotton, lint yields increased by 1.74 and 1.53 kg ha −1 in 1996, and 2.76 and 1.76 kg ha −1 in 1997 for CT and ST, respectively. In 1995, maximum lint yields were estimated with 105 kg N ha −1 for CT. Averaged across years, cotton lint yield increase with N application greater than 67 kg ha −1 was not significant and tillage did not influence lint yields. Plant height, boll no. plant −1 , and boll no. m −2 generally increased with increasing N rates, except for boll no. m −2 in the ST system in 1995. Greatest boll weight and lint weight boll −1 were obtained with the application of 134 kg N ha −1 . Compared with CT, ST reduced boll no. plant −1 and increased boll no. m −2 . Tillage did not influence plant height, boll weight, and lint weight boll −1 . These results indicate that cotton can be grown successfully in ST and that yields may not increase significantly with rates >67 kg N ha −1