THE EFFECT OF BORON ON THE GROWTH AND SEED PRODUCTION OF ALSIKE CLOVER TRIFOLIUM HYBRIDUM L.

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Abstract
Alsike clover plants were grown in six different concentrations of boron to study the growth effect of boron on alsike clover and to observe how the intercrossing of plants having different boron conteat affected seed production. Boron deficiency symptoms occurred in plants grown in nutrient lacking boron, optimum vegetative growth took place in nutrient containing 0.1 to 0.25 p.p.m. boron, and toxicity was observed in plants grown in concentrations of 2.5 and 5.0 p.p.m. boron. Boron was required for flower and seed production, and the optimum level for seed production was 0.5 to 1.0 p.p.m. boron which was higher than that necessary for best vegetative growth. Good numbers of seeds were also obtained when pollen from plants grown in 1.0, 2.5, and 5.0 p.p.m. boron was used on pistils of plants grown in 0.1, 0.25, and 0.5 p.p.m. boron.