The ZBS- 21 tooth harrow is designed for loosening the topsoil, leveling the surface of the field, destroying the soil crust, crumbling lumps, destroying and combing weakly rooted weeds on crops of grain crops and industrial crops, planting seeds and fertilizers. Harrowing of winter crops, pre-emergence harrowing of spring grains (wheat, barley, oats), pre- harvest harrowing of maize, before and after harrowing harrowing of peas, soybeans.   

Effect after the use of dental harrows:

1. Preservation of moisture accumulated in the autumn-winter period due to early spring moisture closure.
2. An effective way to kill weeds in the white thread phase. 
3. Loosening topsoil and remove dead p and walls for winter crops.
4. The destruction of the soil crust, which directly affects the crop.
5. Air circulation in the soil.
6. Adjustment of the heat balance of the surface soil layer.
7. Water balance regulation.
8. Strengthening plant growth.

Soil treatment takes place at a depth of 3-8 cm. The diameter of the breast after treatment is up to 5 cm.