System of fertilizers - in detail developed, scientifically grounded plan of top-dressing which provides the receipt of the planned harvest of agricultural cultures. In him placing of fertilizers is foreseen under all cultures of crop rotation, certain norms, terms and methods of top-dressing taking into account the biological features of plants and ground-climatic terms of district.
TERMS AND METHODS OF TOP-DRESSING. There are three basic methods of top-dressing: to sowing - basic (under ploughing, preseed cultivating), at sowing (string, hearth), after sowing (additional fertilizing). DOSES FERTILIZERS depend on the requirements of cultural plants, features of soil, fertilizer of previous culture, terms and methods of bringing, climatic terms and other reasons. Plants do not use fully a fertilizer in the year of bringing. Part of fertilizers remains untapped and has influence on a harvest plants on the second and even in the third year after bringing. For the calculation of doses of fertilizers need the followings information: 1) Taking away of nutritives (kg) is on one ton of basic products of the fertilized culture at the proper amount of side products (straw, tops and...). 2) Coefficients of the use of elements of feed the fertilized culture are from mineral and organic fertilizers. 3) Information agricultural chemistry laboratory about maintenance of elements of feed in soil (mapsgram) of 4) Planned harvest and mean actual yield of this culture for the last 5 years.