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Published in Soil Sci Soc Am J 29:696-698 (1965)
© 1965 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Sulfur Dioxide as a Source of Sulfur for Wheat1

S. Roberts and F. E. Koehler2

ABSTRACT

Sulfur dioxide was injected into the soil as a source of S for wheat in greenhouse and field studies with S-deficient Athena and Palouse silt loam soils. Yields were approximately doubled when SO2 was applied at a rate of 2.5 ppm S in the greenhouse. Higher rates of SO2 up to 500 ppm S gave little additional growth. Plant growth responses to SO2 and gypsum at 10 ppm S were almost identical. In greenhouse experiments SO2 applied at 2,500 ppm S greatly reduced plant growth, and 5,000 ppm S proved lethal to the plants soon after emergence. Concentration of S in plants was directly related to rate of S application. In field trials, SO2 was applied at rates of 8, 16, 32, and 64 lb S/acre. No adverse effects were noted at the higher rates of application. Sulfur dioxide compared favorably with gypsum as a source of S with respect to plant growth response, total sulfur uptake and wheat yield in the greenhouse, and with respect to total S uptake in the field.

NOTES

1 Scientific Paper No. 2650, Washington Agr. Exp. Sta., Pullman, Project No. 3142. Presented before Div. S-4, Soil Science Society of America, Nov. 21, 1963, Denver, Colo. The authors wish to express their appreciation to Cominco Products, Inc. for supporting this work.

2 Research Assistant and Associate Soil Scientist, Washington State Univ., Pullman.

Received for publication April 19, 1965. Accepted for publication June 25, 1965.






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and Life Sciences Education		 Vadose Zone Journal
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Environmental Quality		 The Plant Genome
Copyright © 1965 by the Soil Science Society of America.