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PRODUCTION PAPER

Evaluation of Tillage and Poultry Litter Applications on Peanut

Dep. of Plant Pathol., North Florida Res. and Educ. Cent., Univ. of Florida, 155 Research Rd., Quincy, FL 32351

^* Corresponding author (pjwiatrak{at}mail.ifas.ufl.edu).

Received for publication October 28, 2003. Detrimental levels of poultry litter (mixture of manure and bedding material) and concurrent effects of tillage need to be determined for peanut (Arachis hypogaea L.) production. Two field trials with ‘Georgia Green’ peanut were conducted in 2001 and 2002. The objective of the first study was to evaluate the influence of seven tillage treatments (chisel, conventional, disk, fall moldboard plow, moldboard plow + chiselvator, ripper bedder, and strip-till) and three poultry litter applications (0, 4.5, and 9.0 Mg ha^–1) before tillage. The objective of the second study was to evaluate four application timings (0, 1, 2, and 3 wk before planting) of high poultry litter rate (13.4 Mg ha^–1) on peanut. In the first experiment, the application of 4.5 and 9.0 Mg ha^–1 poultry litter decreased peanut yields in disk and moldboard plow + chiselvator treatments in both years. However, no detrimental effect of poultry litter was noted with 4.5 Mg ha^–1 on treatment with fall moldboard plow or strip-till. Due to tomato spotted wilt tospovirus severity, peanut yields were less with the application of 4.5 and 9.0 Mg ha^–1 (1844 and 1643 kg ha^–1, respectively) compared with treatment without poultry litter application (2037 kg ha^–1) in 2002. In the second experiment, the least yield decrease was observed with high litter application at 1 wk before planting peanut (1059 kg ha^–1) compared with control (1669 kg ha^–1). These studies indicate that the detrimental effect of poultry litter may be reduced with less poultry litter (up to 4.5 Mg ha^–1) applied to strip-tilled peanut.

Abbreviations: TSWV, tomato spotted wilt tospovirus