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Published online 1 September 1972
Published in Agron J 64:665-667 (1972)
© 1972 American Society of Agronomy
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Cotton Growth Response and B Distribution from Foliar Application of B

O. E. Anderson and Kenneth Ohki2

Foliar application of B has been frequently used to ameliorate B deficiency in cotton (Gossypium hirsutum L.) in the field. This study was initiated to provide information on B distribution pattern and growth responses from foliar application under greenhouse conditions.

Boron was applied to cotton foliage in the greenhouse at three application dates by paint or spray application at the 5 to 7-leaf, early square, and early boll stages. Plants were harvested between 6 and 72 days after application. Growth responses and B content of tissues were related to applied B.

Within application periods, foliar applied B had no effect on top growth, root development, reproductive tissue, plant height, and node number. Boron content of treated leaf blades, sampled at the first harvest after application, showed B levels greater than controls. As indicated by B analysis of petiole and young tips, no evidence of B retranslocation in the main stem tissues was apparent.

Key Words: Micronutrients • Retranslocation

2 Professor of Soil Science and Assistant Professor of Agronomy, respectively, University of Georgia, College of Agriculture Experiment Stations, Georgia Station, Experiment, Georgia 30212. Appreciation is expressed to Dr. J. B. Jones and Dr. R. A. Isaac, Plant Tissue Analysis and Soil Testing Laboratory, University of Georgia, Athens, Georgia, for performing the B analyses.

Received for publication January 26, 1972.




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Copyright © 1972 by the American Society of Agronomy.