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Foliar, Floral, and Root Absorption of Sr⁹⁰ by Crops¹

Synopsis: In a field experiment carried out to determine the relative Sr⁹⁰ content of wheat, oats, alfalfa, and timothy grown in the open compared with that of the same crops grown under clear plastic tents, absorption of Sr⁹⁰ for the uncovered crops exceeded that of the covered for all crops. The Sr⁹⁰ content of flour and bran milled from wheat grown in the open was considerably greater than that of the same fractions milled from wheat which was covered at the flowering stage. However, the ratios of Sr⁹⁰ in the flour to that in the bran were similar in the two situations.

² Research Officer and Research Technician, Canada Department of Agriculture, Ottawa, Ontario. The authors wish to acknowledge the help given by O. S. Scott for care of the crops in the field. Appreciation is also extended to the Grain Research Laboratory, Board of Grain Commissioners for Canada, Winnipeg, Manitoba, and to H. Miller, Genetics and Plant Breeding Research Institute, Canada Department of Agriculture, Ottawa, for milling samples of wheat.

Received for publication June 30, 1964.