The balance of organic matter and soil nutrients, depending on fertilization level of soybean varieties

The purpose of the research is to study effect and interaction straw-litter compost (20 t/ha), ammonium nitrate (30 kg/ha N) microfertilizer Azosol 36 Extra (2 times 2 l/ha) on fertility indicators typical chernozem for soybean cultivation in southern forest-steppe Central Chernozem region. It was found that increase fertilization level based use contributed positive dynamics organic matter macronutrients, formation higher yields, protein content collection. largest soil variants joint – 0.52-0.68%. combination nitrate, as well complex application mineral fertilizers, maintained a balance easily hydrolyzed nitrogen from 3.3 8.2 mg/kg. Perhaps, early-ripening variety Lantsetnaya mainly used fertilizers crop formation, while mid-ripening Belgorodskaya 48 more responsive compost. introduction also caused an mobile phosphorus by 36-47 mg/kg exchangeable potassium 5.4-43 This transfer grouping gradation - high class supply terms both (163-196 mg/kg) (125-168 mg/kg).