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ABSTRACT
A greenhouse study was conducted with alfalfa to determine the relationship between water-soluble B in the soil and plant uptake as affected by soil texture and pH. Soils used were Norfolk sandy loam, Hartsells fine sandy loam, and Decatur silty clay representing coarse-, medium-, and fine-textured soils. Treatments included five rates of B at three pH levels. Yields and B content of plants were measured. After the plants were harvested, soils were analyzed for water-soluble B and pH. Results showed that alfalfa grown on the coarse-textured soil had the highest uptake of B per unit of water-soluble B in the soil and the plants from the fine-textured soil had the least. The medium-textured soil was intermediate. As the acidity decreased from a pH value of 5 to 7, less B was available at any level of water-soluble B in all three soil types. These results indicate that texture and pH must be considered when water-soluble B is used as a measure of availability to plants.
1 Contribution from the Department of Agronomy and Soils, Agricultural Experiment Station, Auburn University, Auburn, Ala. Presented before Div. II, Soil Science Society of America, Chicago, Ill., Dec. 7, 1960.
2 Soil Chemist and Associate Agronomist, respectively.
Received for publication August 14, 1961. Accepted for publication September 28, 1961.
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