Nitrogen applied to oat fields has many morphological and physiological effects on the plants. Increased grain yields have been reported by Nelson et al. (5), Pritchett, (6) and many others; increased overall top growth was reported by Gericke (3); and increased nitrogen content of the grain has been found by Wiggans and Frey (7), Brieba (1), and others. In a greenhouse experiment Gericke (3) found that a delay in applying nitrogen to oats in a low fertility soil increased the number of heads per plant. An application equal to 80 pounds per acre at seeding produced approximately 1.5 heads per plant, while an equal application 90 days later (6 to 7 leaves) resulted in over 3.0 heads per plant. Since, with a given seeding rate of oats, the numbers of tillers produced per plant is a component of yield, it is important to know the effect of different cultural practices on this character. This paper reports the effects of rate and date of nitrogen application on tillering.
Proceedings of the Iowa Academy of Science
© Copyright 1957 by the Iowa Academy of Science, Inc.
Frey, K. J. and Wiggans, S. C.
"Tillering Studies on Oats: IV. Effect of Rate and Date of Nitrogen Fertilizer Application,"
Proceedings of the Iowa Academy of Science, 64(1), 160-167.
Available at: https://scholarworks.uni.edu/pias/vol64/iss1/18