Oplinger, E.S., R.G. Hoeft, J.W. Johnson y P.W. Tracy. 1993. Boron fertilization of soybeans: A regional summary. pp. 7 – 16 in Murphy, L.S. (ed.) Foliar Fertilization of Soybeans and Cotton, Potash and Phosphate Inst. Tech. Bull. 1993 – 1.
Fertilización con Boro en la Soya: Un resumen regional.
Boron (B) has long been recognized as an essential micro-nutrient for vascular plants, however its primary role and mode of action remain unknown. Studies conducted at the University of Missouri demonstrated that foliar applied B could stimulate yield by increasing pods on lateral branches, seed number, and overall seed yíeld. The objective of this study was to determine the influence of supplemental soil and foliar-applied B across a broad range of growing conditions. A total of 29 field studies were conducted during 1991 and 1992 in Wisconsin, Illinois, Ohio, and Missouri. Boron treatments included 0.25, 0.50, and 1.00 lb B/A applied foliarly and 3.0 lb B/A applied to the soil prior to planting. Boron applied at 0.25 lb/A to the foliage at initial flowering increased grain yield from 48.1 up to 49.5 bu/A or 3 percent when averaged over all 29 environments. There was no effect on branches/plant or pods/plant. The higher foliar rates of B and the soil-applied B had no effect on soybean yield or yield components. Foliar applications of B to soybean as a single nutrient may be profitable, but application costs would need to be offset by adding the B to a herbicide, fungicide, or irrigation application.