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Relationship of Soil Test Phosphorus and Sampling Depth to Runoff Phosphorus in Calcareous and Noncalcareous Soils

H.A. Torbert*,a, T.C. Danielb, J.L. Lemunyonc and R.M. Jonesd

a USDA-ARS National Soil Dynamics Laboratory, 411 S. Donahue Dr., Auburn, AL 36832-5806
b 115 Plant Sci. Bldg., Crop, Soil and Environmental Science Dep., Univ. of Arkansas, Fayetteville, AR 72701
c USDA-NRCS, P.O. Box 6567, Ft. Worth, TX 76115
d Texas A&M University Agric. Research and Extension Center, Stephenville, TX 76401



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  		Fig. 1. The relationship between water-extractable P concentration and dissolved molybdate reactive P in runoff for Blanket, Windthorst, Houston Black, and Purves soil.

 


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  		Fig. 2. The relationship between Mehlich III–extractable P concentration and dissolved molybdate reactive P in runoff for Blanket, Windthorst, Houston Black, and Purves soil.

 


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  		Fig. 3. The relationship between water-extractable and Mehlich III–extractable P concentrations and dissolved molybdate reactive P in runoff for calcareous and noncalcareous soils at the 0- to 5-cm depth.

 




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The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Soil Science Society of America Journal Journal of Plant Registrations The Plant Genome
Copyright © 2002 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.