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- W2165087453 abstract "With a steady growth of egg industry in Iowa as the leading state in the US, there is a huge amount of poultry manure released into the environment and need to be treated properly. Land application of poultry manure on crop production and pasture has been considered as proper management practice to utilize the valuable nutrient content of poultry manure (N, P, K and other minerals) for crop development instead of chemical fertilizer. However, there is an environmental risk of over-applying poultry manure on soil and water quality especially for field plots having tile-drained systems. A few long-term studies have been done to evaluate the impacts of poultry manure application rates on soil and subsurface water quality, and crop production to expose the experiment over a wide range of weather conditions for better understanding and being able to provide informed recommendations. A long-term study (1998-2009) was conducted to evaluate the environmental impacts of surface applied poultry manure on crop production, nitrate and phosphorus leaching in tile drain water as well as nitrate and phosphorus built-up in top soil. Application rates include two poultry manure application rates (168kg-N/ha PM and 336 kg-N/ha – PM2) with three replications for each rate, urea ammonium nitrate – UAN (168kg-N/ha) with four replications and a control None (0kg-N/ha). These treatments are assigned on eleven field plots equipped by a state-of-the-art single subsurface tile drain. Tile drain is intercepted by a sump to collect the tile flow and sample water. Corn is planted on one half and soybean on the other half of the plot. Only corn areas receive the treatments. Corn and soybean are rotated yearly. Soil NO3-N and PO4-P concentration are collected in Spring (before applying" @default.
- W2165087453 created "2016-06-24" @default.
- W2165087453 creator A5071282612 @default.
- W2165087453 date "2018-08-10" @default.
- W2165087453 modified "2023-09-24" @default.
- W2165087453 title "Impacts of long-term application of poultry manure on subsurface drain water quality" @default.
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