Stratified Profiles: Characteristics of Simulated Soils in a Beef Cattle Feedlot1
- Fred A. Norstadt and
- Harold R. Duke2
Profile combinations of clay loam, sand, clay loam over sand, and sand over clay loam were used to study salt movement and mineral nitrogen (N) transformations in a beef cattle feedlot. These soils were placed in lysimeters located in a feedlot stocked at the rate of one animal, weighing 270 to 450 kg, per 15.2 m2. The feedlot was bedded with sawdust and stocked continuously. After the lysimeters were in use 4 years, cores were removed for physical and chemical analyses. Each profile combination affected salt movement and mineral N transformations differently. Sand over clay loam was the superior combination to retard nitrate-N (NO3--N) movement and retain salt. In this configuration organic matter apparently moved from the manure pack through the sand along with NO3--N and may have enhanced denitrification in the clay loam layer. The effect of location within the feedlot and depth increment within a given soil fill and their interaction were not important variables influencing profile chemical characteristics.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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