Reaction of new soybean varieties Slavia and Alba to change in density of agrophytocenosis in the wide-row sowing

As a result of experiments held in 2006-2010 on leached chernozem the optimal agrophytocenosis density of new soybean varieties were determined: fast-ripening Slavia and early-maturing Alba for the central zone of the Krasnodar region, which provide the highest seed yield and protein yield per hectare. A positive response of the variety Slavia to the increase of agrophytocenosis and the inertia to it of varieties Alba and Vilana were revealed. The sowing the fast-ripening variety Slavia with the norm of 400 thousand seeds per ha, and the early-ripening variety Alba and medium-early-ripening variety Vilana - 200 thousand seeds/ha is agronomically and economically justified.