Urea - nitric fertilizer; it is used with success on not sour soils in a combination with phosphoric and potash fertilizers. Urea is introduced at processing of a site from calculation 2kg on 100m2.
At additional fertilizing it is possible to introduce up to 600-700g urea. For liquid additional fertilizing 50-70g urea is dissolved in 10l water. This solution is watered on 10m2 areas. Additional fertilizing should be introduced to plants not later than the middle of summer, not to detain crop maturing. Urea should be stored in a dry premise.