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Chemical Elements in Soils Under Cattle Pens¹

ABSTRACT

In cattle feedlots, the manure builds up and to some extent becomes incorporated into the soil profile through downward leaching and the stirring action created by the cattle. The object of this study was to measure the extent of build-up of certain chemical elements resulting from the cattle wastes within the soil profile (Felda fine sand) in a cattle feedlot after 10 and 15 y. Soil samples were taken at 15-cm increments from the soil surface to a depth of 137-cm. Results indicated most of the increase of elements occurred near the soil surface. Within the soil profiles, the magnitude of increase of the chemical measurements compared with the control profile after 10 and 15 y were as follows, respectively: Mg, 23 and 39 times the amount in the control profile; P, 50 and 95; Ca, 11 and 29; K, 133 and 85; Mn, 4.4 and 9.5; Fe, 1.4 and 1.3; Cu, 2.5 and 4.2; soluble salts, 5.9 and 8.6; and percent organic matter, 1.6 and 5.1 times the amount in the control profile. The range of soil pH values increased from 3.6 to 4.7 for the control; from 7.8 to 9.1 after 10 y, and from 8.3 to 8.7 after 15 y.

Key Words: manure • soil accumulation • time • depth • leaching

¹ Florida Agric. Exp. Stn. Journal Set. no. 3539.

² Associate Professor of Soil Chemistry, University of Florida, Agric. Res. Ctr., Ona; Former Assistant Professor of Animal Nutrition, University of Florida, Agric. Res. Ctr., Ona; and Associate Professor of Statistics, University of Florida, Gainesville, respectively.

Received for publication May 17, 1982.

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