Micronutrient rates boron. recommended application rates of boron are rather low (0.5 to 2 lb/acre), but should be carefully followed because the range between boron deficiency and toxicity in most plants is narrow. uniform application of boron in the field is u2026 Crop choice carries liquid boron fertilizer in bulk. as a liquid boron micronutrient fertilizer supplier and distributor our customers depend on us for a consistent and cost-effective supply of boron micronutrient. crop choice has a team dedicated to ensuring the quality of the boron micronutrient we supply.. product description: boron micronutrient is vital to the growth and development of the plant. Oct 24, 2016u00a0u00b7 normally, i donu2019t recommend applying boron.u201d if deficiencies exist, theyu2019re usually on droughty or sandy soils, he says. 3 to 5: the yield loss in soybeans that excess boron can cause. source: university of minnesota. copper (cu): this micronutrient promotes seed production in plants and has a role in chlorophyll and enzyme activity. And whether micronutrient boron fertilizer is humic acid, ammonium nitrate, or calcium nitrate. there are 133 micronutrient boron fertilizer suppliers, mainly located in asia. the top supplying countries or regions are china, south africa, and turkey, which supply 92%, 1%, and 1% of micronutrient boron fertilizer respectively.