Submitted to: Meeting Abstract
Publication Type: Proceedings
Publication Acceptance Date: June 1, 1998
Publication Date: N/A
Technical Abstract: Manure from swine production is often considered a waste and an environmental liability because of the generation of large amounts of nitrogen and phosphorus. Manure is a valuable crop nutrient and soil resource because of the positive effect on the soil and the long-term benefits on soil quality that lead to an increased nutrient use efficiency by crops. During the first year only 50% of the nutrients are available, with portions available in the second and third years. There is a positive response of manure additions to the soil. These include increased soil respiration rates, decreased soil bulk density, increased soil organic carbon content, increased soil water holding capacity, increased infiltration, and decreased erosion potential. These changes occur within the first 5 years after manure becomes part of the nutrient management plan for the field. Environmental problems have been linked to manure application. These include increased leaching of nitrogen and runoff of phosphorus. These can be eliminated through the use of nutrient management plans. Manure is a valuable soil resource that can be used in a manner to avoid all environmental problems.