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The Development of Carbohydrate Reserves in Alfalfa Seedlings Under Various Levels of Shading and Potassium Fertilization¹

Synopsis: Substantial concentrations of carbohydrates were evident in roots of Du Puits, Vernal, and African seedlings 6 weeks after seeding. Neither growth under reduced light intensity nor 3 potash fertilization rates affected root concentrations of total available carbohydrates (TAG), but total amounts increased as root growth was greater under the higher light intensities and higher potash rates. Varieties differed less in the amounts of TAG produced than in the concentration of TAG in the roots.

² Research Agronomist, Crops Research Division, ARS, USDA, and University of Missouri, formerly Instructor, Purdue University; Professor of Agronomy, Purdue University; and Agronomist, Crops Research Division, ARS, USDA, and Purdue University.

Received for publication August 10, 1962.