A field method for determing percentage of coated sand grains
D.L. Lindboa,
M.J. Vepraskasb and
F.E. Rhotonc
a Dep. of Soil Science, North Carolina State Univ., Vernon G. James Research and Extension Center, 207 Research Station Road, Plymouth, NC 27962
b Dep. of Soil Science, North Carolina State Univ., Raleigh, NC 27695
c USDA-ARS, National Sedimentation Lab., P.O. Box 1157, Oxford, MS 38655

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Fig. 1. Average, high, and low values of percentage black sand grains of 46 soil scientists without using the standards
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Fig. 2. Average, high, and low values of percentage black sand grains of 46 soil scientists using the standards
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Fig. 3. Results of quantitative color determination
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Copyright © 2001 by the Soil Science Society of America.