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Contributor Notes
Received for publication, July 24, 1972. Joint contribution from the Southern Branch, Soil and Water Conservation Research Division, ARS, USDA, and the Departments of Biological and Agricultural Engineering and Horticultural Sciences, North Carolina State University. Approved for publication as paper number 3827 in the Journal series of the North Carolina State University Agricultural Experiment Station, Raleigh, N. C. The use of trade names in this publication does not imply endorsement by the U. S. Department of Agriculture or the North Carolina Agricultural Experiment Station of the product names, nor criticism of similar ones not mentioned.
Soil Scientist, U. S. Dept. of Agriculture, and Assistant Professor, Department of Horticultural Sciences, respectively.
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