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Field Studies of Internal Moisture Relations of the Corn Plant¹

Synopsis: The results of this study agree with the hypothesis that the electrical conductivity of corn stem tissue is primarily related to hydration of the cell wall. Plant stem resistance measurements taken before 8:00 a.m. show a carry-over effect of moisture stress experienced by the plant during the preceding 24-hour period or longer. Relative turgidity measurements of corn leaves taken at the same time did not show a marked carry-over effect of internal moisture stress.

² Graduate Assistant, Department of Agronomy, Cornell University, and Soil Scientist, Eastern Soil and Water Research Branch, SWCRD, ARS, USDA, Ithaca, N. Y. (The senior author is now Soil Scientist, Western Soil and Water Management Research Branch, SWCRD, ARS, USDA, Weslaco, Texas.)