Rotary harrow-hoe John Deere 400 John Deere (4, 6, 6, 9, 12 m.), Odesa region.

RotationalJohn Deere harrow 4000

It is intended for pre-emergence and post-emergence harrowing of field crops (cereal, fallow, technical crops) with the purpose of:

of surface loosening and soil aeration.
destruction of filamentous weed entrances
(//tractor-service.com)
The working organs of the hoe create an ideal background for the initial development of the root system of plants, they mulch the top layer of the soil well, destroying the soil crust, thereby preserving moisture, and they destroy the filamentous roots of weeds up to 100% at speeds of up to 20 km/h.

This makes it possible to switch to herbicide-free technology. When a monolithic soil crust appears on the early seedlings of cultivated plants, for example, corn at the stage of 2-3 leaves, when the use of tooth harrows is impossible, the efficiency of using a hoe increases dramatically.

On corn crops, with the use of a BMR hoe on seedling treatment (the "stilt" stage) and in the 3-6 leaf phase, air access to the root system is ensured, 100% destruction of filamentous weeds, as well as up to 27.5% of weed seedlings, and preservation of moisture, which in turn has a favorable effect on the further development of cultivated plants. When processed with BZSS-1 harrows, up to 10-15% of cultivated plants are damaged, and when processed with aharrow hoe BMR is damaged up to 0.8%.

On sunflower crops, treatment was carried out on seedlings (two false leaves) and in the 2-6 leaf phase, the effect was similar to the treatment on maize seedlings. Research data on the expediency of replacing nitrogen fertilizers with spring loosening with a BMR hoe were confirmed, the effect was obtained as a result of saving fertilizer, as well as costs for their loading, transportation and application.