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Central Florida | I beg to differ on foliar applications of Boron. I refer to the book "Physiology and Determination of Crop Yield". Chapter 10A titled Uptake, Translocation, and Function of Essential Mineral Elements in Crop Plants written by Dale G.Blevens, University of Missouri. " Boron" "............Stem infusions of B increased pods on branches of field-grown soybeans (Schon & Blevins, 1987). In subsequent studies with both soil and foliar applications of boric acid,yield parameters were not increased by soil B applications, however six split foliar applications of 1.12 and 2.24 kg/ha of B significantly increased the number of branches and pods on branches (Schon & Blevins, 1990). Leaves from plants in the highest- yielding plots contained over 240 mg kg -1 B (Schon & Blevins, 1990). Perhaps the statement in the most recent soybean handbook that leaf B concentrations of over 60 mg kg -1 are toxic should be reconsidered (Scott & Aldrich, 1983). ........ For many crop plants, soil-applied B may be unable to provide an adequate supply to the reproductive plant without first becoming toxic to the roots. Foliar applications of B, and perhaps Ca, after flowering may be required to maintain adequate levels in leaves, flowers, pods, and developing seeds. Flower components, pollen germination, and pollen tube growth require more B than vegetative tissues (Vaughan, 1977). In addition, B may be an important chemotropic agent in the directional growth of pollen tubes (Robbertse et al., 1990) .......
Edited by Mosoildoc 1/30/2012 12:02
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boron for corn
