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Physiological Factors Affecting Composition of Soybeans: II. Response of Oil and Other Constituents of Soybeans to Temperature Under Controlled Conditions¹

Synopsis: Oil content averaged 23.2%, 20.8%, and 19.5% when day temperatures of 85°, 77° , and 70° F., respectively, were used during the pod-filling stage. A day temperature of 85° for one week during this period increased oil content from 19.6% to 22%. Temperature treatments affected mainly the triglyceride portion of the oil. Acetone-insolubles in the oil, protein and nonprotein nitrogen, and yield were not affected significantly.

² Plant Physiologist and Agronomist, respectively, Crops Research Division. ARS. USDA. Chemical analyses were performed by F. I. Collins and O. A. Krober.

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