DOES POULTRY LITTER INCREASE SOYBEAN YIELDS IN A WHEAT/SOYBEAN DOUBLE-CROP PRODUCTION SYSTEM?
Applied Research
Timothy Reed
EXTENSION SPECIALIST
ALABAMA COOPERATIVE EXTENSION SYSTEM
Belle Mina
Abstract
Research-based information is lacking about the yield response of soybeans planted behind wheat when the wheat is fertilized with poultry litter and/or commercial nitrogen (N). The objective of this 2010-2013 study was to compare the yield response and crop value of double-cropped soybeans following wheat that was fertilized with different poultry litter and commercial N fertilizer treatments. The study was conducted in north Alabama on non-irrigated plots with initially high levels of P and K. There were 5 fertility treatments with 4 reps/treatment arranged in a RCB design. The 5 wheat fertilizer treatments were as follows: (1) 2 tons litter/A pre-plant {L} (2). 2 tons litter/A pre-plant + 1.5 tons litter/A topdress {LL} (3). 20 lbs. commercial N/A pre-plant + 80 lbs. commercial N/A topdress [C] (4). 2 tons litter/A pre-plant + 40 lbs. commercial N/A topdress {LC} (5). 100 lbs. commercial N pre-plant as a N rich strip {NRS}. There was no statistically significant effect on soybean yields with respect to fertility treatments in 2010 with severe drought conditions or in 2012 with abundant rainfall. However, in 2011 with moderate rainfall all 3 litter treatments had significantly greater soybean yields than the 2 commercial N treatments. During 2013 with abundant rainfall the LL treatment yield was significantly greater than that of the other 4 treatments. Average gross receipts for the soybeans produced by each treatment during the 4 year period were as follows: L= $505; L= $509; C= $449; LC= $466 and NRS= $466.
\r\n
Poster has NOT been presented at any previous NACAA AM/PIC
This poster is being submitted for judging. It will be displayed at the AM/PIC if not selected as a State winner. The abstract will be published in the proceedings.
A poster file has not been provided
Authors: M. H. Hall, T. D. Reed
-
Hall, M. EXTENSION SPECIALIST, ALABAMA COOPERATIVE EXTENSION SYSTEM, Alabama, 35615
-
Reed, T. Extension Specialist, Alabama Cooperative Extension System, Alabama, 35615