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[2]
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[3]
DELVER P, 1960, 7TH T INT C SOIL SCI, P370
[4]
NELSON RE, 1978, USDA2 SCS SOILS TECH
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Rhoades J.D., 1982, METHODS SOIL ANAL PA, V2nd ed., P167, DOI DOI 10.2134/AGR0NM0N0GR9.2.2ED.C10
[8]
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[9]
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[10]
Whitney M., 1897, USDA DIVISION SOILS, V8