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Effects of various plant foods on growth activities and development of oats

McClelland, C.K.
Agronomy journal 1931 v.23 no.4 pp. 304-311
Avena sativa, fertilizers, tillering, greenhouse production, planting, plant nurseries
Under the given conditions phosphorus seemed most beneficial in increasing the number of tillers, the number of heads at harvest, the number of spikelets per head, the yield, and the size of the seed of oats. The results are variable and, in the matter of number of spikelets per head in winter oats, are entirely reversed. Phosphorus exerted a marked influence in causing early tillering, and growth and a quick shading of the ground. The early lead of plants having phosphorus, however is not entirely maintained, and the difference in appearance at harvest is much less marked. Nitrogen close]y followed phosphorus in its effect upon tillering, number of heads at harvest, number of spikelets per head, and yield. Potassium exerted no influence, unless one of restriction, on number of tillers and number of heads per plant or per row at harvest, and upon yield. In combination with nitrogen and phosphorus, however, it increased the size of seed, but the latter elements exerted better influence on the weights per bushel and upon general growth and development. High and significant correlations were found between length of heads and number of spikelets per head in nearly all instances.