RESERVES FOR potato PRODUCTIVITY INCREASE DUE TO ADAPTIVITY of POTATO VARIETIES
In the forest-steppe zone of the Southern Urals, mid-early ripening varieties have the advantage, their yields in 2004-2006 were 24.41 t/ha average, for comparison: the yields of mid- ripening varieties were 23.43 t/ha, early ripening varieties - 22.25 t/ha. Cultivation of adaptive varieties of local selection is an opportunity to receive a higher yield without additional costs. In comparison with “Nevsky” variety, “Curator” variety has given yield increase of 4.99 t/ha average, “Spiridon” variety - 2.53 t/ha, “Tarasov” variety - 2.40 t/ha, “Gubernator” variety - 1.11 t/ha, “Chelyabinets” variety - 1.10 t/ha average.