A Modified Risk Assessment to Establish Molybdenum Standards for Land Application of Biosolids
George A. O'Connor*,a,
Robert B. Brobstc,
Rufus L. Chaneyc,
Ron L. Kincaidd,
Lee R. McDowellb,
Gary M. Pierzynskie,
Alan Rubinc and
Gary G. Van Riperf
a Soil and Water Science Dep., Univ. of Florida, P.O. Box 110510, Gainesville, FL 32611
b Dep. of Animal Science, Univ. of Florida, P.O. Box 110510, Gainesville, FL 32611
c USDA/ARS, Beltsville, MD 20705
d Dep. of Animal Sci., Washington State Univ., Pullman, WA 99164
e Dep. of Agronomy, Kansas State Univ., Manhattan, KS 66506
f Montgomery Watson, Lakewood, CO 80228

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Fig. 1. Net soil Mo load with time when soil is amended with biosolids containing either 75 or 40 mg Mo kg-1 at 10 Mg biosolids ha-1 yr-1 and the leaching coefficient is either zero (no leaching) or 1.8% yr-1.
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Fig. 2. Net soil Mo load with time when soil is amended with biosolids containing either 75 or 40 mg Mo kg-1 at 10 Mg biosolids ha-1 yr-1 and the leaching coefficient is either zero (no leaching) or 5% yr-1.
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Copyright © 2001 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.