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Published online 1 January 1969
Published in Agron J 61:9-13 (1969)
© 1969 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Influence of Boron, Nitrogen, and Potassium on Yield, Nutrient Uptake, and Abnormalities of Cotton

Woody N. Miley2, Glenn W. Hardy3, M. B. Sturgis4 and Joe E. Sedberry, Jr.4

A field experiment was conducted on Beulah sandy loam to determine the influence of applications of B, N, and K on the yield, nutrient concentrations, and occurrence of growth abnormalities in cotton (Gossypium hirsutum). Symptoms indicative of B deficiency had been observed on the site the previous year. Applied B increased yield only when N was applied. Applied N increased yield only in the presence of applied B. Potassium fertilization had no effect on yield. Generally the B concentration in the plant tissue was increased by applied B, decreased by applied N, and not affected by applied K. At the early boll and medium boll stages of maturity, applied B decreased the percent total N in the leaf petioles but had no effect on that in the leaf blades. At the early square stage, applied B decreased the percent total N in the petioles when N was applied but had no effect on N concentration when no N was added. At two of three stages of maturity, applied B decreased the occurrence of ringed petioles, an abnormality considered to be a symptom of B deficiency. Applied N generally increased the occurrence of ringed petioles. At the early square stage, applied K, in the absence of applied B, increased the occurrence of ringed petioles but had no effect on the presence of rings when B was added.

Key Words: Trace elements • Micro-nutrients • Deficiency symptoms

1 Part of a dissertation submitted by the senior author to Louisiana State University in partial fulfillment of the requirements for a Ph.D. in agronomy under the direction of Dr. M. B. Sturgis. Published with the approval of the Directors of the Arkansas and Louisnana Agricultural Experiment Stations. The study conducted at the two stations was supported with funds from the American Potash Institute, the National Plant Food Institute, and the U. S. Borax and Chemical Corporation.

2 Soils Specialist, Agricultural Extension Service, University of Arkansas, Box 391, Little Rock, Ark. 72203.

3 Agronomist, Agricultural Experiment Station, and now Dean of the College of Agriculture and Home Economics, University of Arkansas.

4 Recently retired Head of the Department of Agronomy and Agronomist, respectively, Agr. Exp. Sta., Louisiana State University.

Received for publication July 1, 1968.




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Copyright © 1969 by the American Society of Agronomy.