Fuente: WIPO "tomato" The present invention relates to a water dispersible granular composition comprising a homogeneous mixture of one or more of water insoluble Magnesium salt, complex or derivatives thereof in the range of 5%-80% w/w of the total composition and one or more of water insoluble Iron salt, complex or derivatives thereof in the range of 1%-50% w/w of the total composition; with at least one agrochemically acceptable excipient; wherein the elemental Iron is present in the range of 0.01% to 50% by weight of the total composition and wherein the elemental Magnesium is present in the range of 0.1% to 50% by weight of the total composition and wherein the composition comprises particles in size range of 0.1 micron-30 microns. The present invention relates to a process of preparing the crop nutrition composition and method of treating plants, seeds, crops, plant propagation material, locus, plant parts thereof or soil with the crop nutrition composition.