Boron in Borax helps in new cell development, flower and fruit formation, root development & synthesis of amino acids and proteins. Helps in nitrogen fixation in leguminous crops.

Borax contains element Boron to the level of 10.5% w/w min. Boron is one of the seven micronutrients required by the plants for their healthier growth. Uptake of boron is difficult in sandy & dry soils. Heavy rainfall causes boron deficiency due to leaching of boron by rain water. 

Some of the symptoms shown by crops suffering from Boron deficiency are, restricted flowering and fruit development; discoloration, cracking or rotting of fruits & tubers; thickened, wilted or curly leaves. All these directly reduce the crop yield.