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The Effect of Soil Moisture Content Upon the Uptake of Molybdenum, Copper, and Cobalt by Alsike Clover¹

ABSTRACT

The effect of soil moisture level on the uptake of Mo, Cu, and Co by alsike clover was investigated in a greenhouse experiment with two Brown Podzolic soils from New Hampshire and a Weisenboden and a Brown soil from Nevada. A wet soil condition increased the Mo in the soil solution and plant Mo content on all four soils. The Co concentration in the soil solution was higher in pots maintained at the high moisture level than at the low moisture level. This increase in Co concentration with soil wetness was reflected in alsike clover, over four cuttings, on the two Brown Podzolic soils, but not in plants from the two Nevada soils. Copper contents in the plants and in the soil solution did not differ consistently because of soil wetness.

¹ Joint publication from the U. S. Plant, Soil, and Nutrition Laboratory, Soil and Water Conservation Research Division, ARS, USDA, Ithaca, N. Y., and the Soil Survey Investigations, SCS. Presented before Div. IV, Soil Science Society of America, Ithaca, N. Y., Aug. 22, 1962.

² Research Soil Scientist, SCS; Soil Scientist (Physics), ARS; and Director, U. S. Plant, Soil and Nutrition Laboratory, ARS, respectively. The authors gratefully acknowledge the assistance of V. A. Lazar and M. V. Marion of the U. S. Plant, Soil and Nutrition Laboratory in the conduct of this experiment.

Received for publication January 28, 1963. Accepted for publication April 5, 1963.