Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 May 1957
Published in Agron J 49:271-276 (1957)
© 1957 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Variability in Phosphorus Rate and Source Experiments in Relation to Crop and Yield Levels1

G. L. Terman2

Sypnosis: In 433 phosphorus rate and source experiments in 7 Southeastern states, the distributions of C.V. for corn, cotton, legume-grass hay and small grain were similar. C.V. was negatively correlated with yield levels for all crops. Standard errors per plot were positively correlated with yield for corn and alfalfa but not significantly for cotton and wheat. There were no consistent interactions between phosphorus sources and rates.

1 The experiments summarized in this paper were reported to TVA by seven state experiment stations of the Tennessee Valley region—Alabama, Georgia, Kentucky, Mississippi, North Carolina, Tennessee, and Virginia. Presented before Division IV at the 1956 Annual meeting, S.S.S.A. Cincinnati, Ohio.

2 Agronomist, Soils and Fertilizer Research Branch, TVA, Wilson Dam, Alabama.

Received for publication December 3, 1956.




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Environmental Quality		 The Plant Genome
Copyright © 1957 by the American Society of Agronomy.