Click on “Download PDF” for the PDF version or on the title for the HTML version.

If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options.

Beef Feedyard Effluent Application Effects on Nutrient Mass Balances for Three Cropping Rotations of Sorghum and Wheat

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  024147,  2002 ASAE Annual Meeting . (doi: 10.13031/2013.10579) @2002
Authors:   M.B. Rhoades, D.B. Parker, J.M. Sweeten, N.A. Cole, M.S. Brown
Keywords:   Feedyard, beef, effluent, runoff, wheat, sorghum, land application

Feedlot runoff was applied to 27 plots of winter wheat and forage sorghum over 24 months at the Agriculture Research Station located at Bushland, TX, 12 miles west of Amarillo. Each plot measured 16 m x 4.5 m to allow for access of farming implements. All plots were plowed with an offset disc, chiseled, and leveled with a laser plane before planting. Wheat was sown at the rate of 67 kilograms of seed per hectare. Sorghum was planted in 6 rows, 75 cm apart, at the rate of 11.25 kg/ha. Runoff was applied by flood irrigation on the level borders. Rates applied were as follows: 0 cm/cropping season (Treatment 1, control), 25 cm (Treatment 2), and 50 cm (Treatment 3). Cropping rotations of sorghum-fallow, wheat-fallow, and sorghumwheat (two crops per year) were used for each TRT. Plots were irrigated every two weeks after plant emergence until the appropriate amount of effluent was obtained. The crop was then allowed to mature until the majority of the plants had reached an early boot stage. At this time, vegetative samples were collected and allowed to dry for three weeks, after which they were ground, mixed and analyzed in the laboratory. Soil samples were collected before planting and after harvest and also analyzed in the laboratory. Effluent samples were collected three times during each irrigation, composited, and analyzed. Nutrient mass balances were calculated for total N, plantavailable P, K, Mg, Na, and Cl. Total N tended to have positive balances in year one and negative balances in year two. P had positive balances both years, but balances were smaller in year two. Both K and Na had large increases for both years.

(Download PDF)    (Export to EndNotes)