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ABSTRACT
Evidence is presented for validity of the concept of soil solution composition as a useful reflection of soil chemical environment that can be related to plant-root growth. Analysis of soil extracts does not give the same information. Samples of the soil solution can be obtained by displacement at any desired moisture level.
1 Contribution of Soil & Water Conserv. Res. Div., ARS, USDA, in cooperation with the Auburn Univ. Agr. Exp. Sta., Auburn, Ala.
2 Research Soil Scientist, SWCRD, ARS, USDA, Auburn, Ala. 36830.
Received for publication November 25, 1970. Accepted for publication January 14, 1971.
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