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- W2546631639 abstract "Primary environmental concerns regarding application of poultry litter (PL) for crop production are nitrate leaching into ground water and increased levels of P in the soil that can erode into surface water. This study was initiated to investigate use of warm- and cool-season annual forage crops to remove excess nutrients supplied by PL in rotational-cropping systems on a Bowie fine sandy loam (fine-loamy, siliceous, thermic, Plinthic Paleudults). PL was applied at one (1×) or two (2×) times the recommended rate in the spring, fall, or spring and fall. Rates were based on N requirement of the crop and percent N in the litter. Comparisons were made to fertilizer blends (FB) and control treatments with no PL or FB. After 3 years of treatments, NO 3 -N increased at the 122-cm depth by 30 and 50 mg·kg –1 from the 1× and 2× rate, respectively. The greatest accumulation was from FB (72 mg·kg –1 ). With PL applied in spring only, spring vegetables followed by a fall cover showed a significant reduction in NO 3 -N leaching and accumulation. Regardless of cropping system, rate, or time of application, P concentration increased by 40 mg·kg –1 in the surface 15 cm of soil when compared to FB. If applied in an environmentally sound manner, PL will be less of a threat to pollution of ground water than similar rates of FB. Applying PL rates sufficient to meet crop needs for N results in P accumulation that can lead to nonpoint source pollution of surface waters." @default.
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- W2546631639 date "1996-09-01" @default.
- W2546631639 modified "2023-09-24" @default.
- W2546631639 title "CROPPING SYSTEM AND POULTRY LITTER EFFECTS ON RESIDUAL SOIL NO3-N AND P" @default.
- W2546631639 doi "https://doi.org/10.21273/hortsci.31.5.756c" @default.
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