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Effect of Growth Promotants on the Occurrence of Endogenous and Synthetic Steroid Hormones on Feedlot Soils and in Runoff from Beef Cattle Feeding Operations

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Academic year: 2020

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Table S7. Concentrations of total phosphorus, total nitrogen,Nutrients measured in runoff in 2008 are presented in SIsolids are consistent with previous studies investigating nutri-ents and solids in feedlot runoff.dissolved NH4−N, dissolved NO3−N, and total suspended27 Concentrations of totalphosphorus, total nitrogen, and total suspended solids were notcorrelated with the concentration of total steroid hormonespresent in the runoff samples (data not shown).Steroid Occurrence on Feedlot Surfaces.
Table 2. Concentrations of Steroid Hormones (ng/g dry weight) Detected in Feeding Pen Surface Samples, Urine-Soaked Surface Soil Samples, And Fresh Manure Samples ina2007
Figure 1. Comparison of natural steroids in treated and implanted cattle. (A) feedlot soil from treated cattle pens, (B) feces from treated cattle,(C) feedlot soil from control cattle pens, (D) feces from control cattle.

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