Submitted to: American Society of Agronomy Meetings
Publication Type: Abstract Only
Publication Acceptance Date: October 20, 2001
Publication Date: November 20, 2001
Citation: HUBBARD, R.K., HONEYCUTT, C.W., ALBRECHT, S.L., BRINK, G.E., EGHBALL, B., MCGOWAN, S., SISTANI, K.R., WIENHOLD, B.J. A USDA-ARS NATIONALLY COORDINATED PROJECT TO DETERMINE N MINERALIZATION FROM ANIMAL MANURE -- SOILS. AMERICAN SOCIETY OF AGRONOMY MEETINGS. Abstract #50. 2001. Technical Abstract: Methods are needed to utilize nutrients contained within animal wastes while at the same time protecting environmental quality. USDA-ARS is conducting nationally coordinated research to develop N mineralization predictions over a wide range of U.S. soils and animal wastes (dairy, beef, swine, and poultry). The physical properties of soils are very important to crop growth, movement of chemicals, and microbial processes such as mineralization. Crop growth, movement of chemicals and microbial processes are affected by soil moisture retention, which related to particle and pore size distribution and bulk density. Seven different soils from across the United States are being used for the N mineralization study. The soils are Bangor silt loam and Caribou gravelly loam from Maine, Valentine fine sand and Sharpsburg silty clay loam from Nebraska, Ruston fine sandy loam from Mississippi, and Adkins fine sandy loam and Walla Walla silt loam from Oregon. Soil moisture retention was determined on packed soil samples ove the range from near saturated to 1 bar in tempe cells. High pressure plate extractors were used to determine soil moisture retention at 15 bars pressure. This paper reports the soil moisture retention and bulk density properties of the soils used for the study.