Seeds productivity of crop rotation with oil flax and sunflower on leached chernozem of Western Ciscaucasia

There were estimated productivity of oil flax, sunflower and winter wheat in special crop rotation on leached chernozem of Western Ciscaucasia at VNIIMK, Krasnodar, in 2005-2009. The purpose of the work was agricultural estimation of total seeds yield in crop rotations: 1. Oil flax; 2. Sunflower; 3. Winter wheat and 1. Oil flax; 2. Winter wheat. The real yield of studied crops was converted into seed units by conversion coefficients of plant industry production. The results of the research showed that crop rotation link oil flax - winter wheat - sunflower is more productive (on 0.93 t seed units ha-1 or 7.45%) in comparison with link oil flax - sunflower - winter wheat. Thus, cultivation of these crops in such sequence is agriculturally more reasonable.