It is best to fertilize before pre-sowing cultivation, so as the fertilizer is mixed with the soil. In light soils it is recommended to divide the dose into 30-50% during early autumn, and the remaining fraction during early spring in order to prevent washing out the constituents. In cultivation of winter rapeseed and wheat, the fertilizer may be successfully applied in early spring in order to regenerate the field after winter and stimulate plants vegetation in spring. On perennial fields very good effects of application of the fertilizer may be achieved by fertilizing in spring and in smaller doses during the use of a meadow or pasture, preferably after pasturage or harvest.