Baranchuk Y. Substantiation of norms of alighting tubers of a potatoes under planned yield in conditions of central Woodlands of Ukraine.

In work the features of body height and development of plants of a potatoes, formation of yield and change of biochemical structure tubers in dependence on variety, mass landing tubers, area both level of a feeding and interaction of these factors are investigated. It is established, that the variety differ among themselves on amount of stems of ability tubers and form the different area of a leaf area of plantations under identical conditions of cultivation, that it turn accordingly influences a level of productivity. For the first time for conditions central Woodlands of Ukraine, the proved norms of alighting tubers of a potatoes under planned yield are developed scientifically - which allow to establish them in dependence on variety, dimension landing tubers (from 25 up to 120 g), correct their quantitative accommodation (from 29 up to 71 ths. pieces/ha) in dependence on used fertilizings (without fertilizings, appiying 60 t of a manure, N60P60K90 and N90P90K120 on a background of a manure). The opportunity of effecting of a potatoes of planned yield is determined, at an economical expenditure of a landing stuff, organic and mineral fertilizings. The assessment of an economic efficiency of cultivation of a potatoes, different on precocious of varieties is carried out.