Influence of mineral fertilizers on efficiency of hybrids of corn of domestic and foreign selection in conditions forest-steppes of Northern Kazakhstan

Due to the intensive introduction in Northern Kazakhstan of livestock complexes with the West European technologies of the maintenance of cattle, sharply there was a question of compliance of food supply to requirements of these technologies. This circumstance caused again interest to corn cultivation on a silo which in the eighties occupied last century about 55 thousand hectares in the region.