GRANULAR COMPLEX FERTILIZER Russian patent published in 2001 - IPC

FIELD: agriculture. SUBSTANCE: granular complex fertilizer is prepared in the form of multilayer granules each layer being essentially main nutrient component of plants based on compounds individually phosphorus and individually potassium in admixtures with microfertilizers. Each group of layer from phosphorus compounds and potassium compounds is intended for dissolution within one year, and number of groups of layers corresponds to the desired number of activity of entire granule of fertilizer. Fertilizer has prolonged activity, is ecologically safe, for it is not washed away nor disintegrated, all components having form that is assimilated by plants due to metastable structure of glassy state. EFFECT: improved properties of the granular complex fertilizer. 2 dwg, 1 tbl