ВЛИЯНИЕ ОБРАБОТКИ ПОЧВЫ НА АГРОФИЗИЧЕСКОЕ СОСТОЯНИЕ ЧЕРНОЗЕМА И ПРОДУКТИВНОСТЬ ЯРОВОЙ ПШЕНИЦЫ

Results are given from evaluation study (2013–2015) of basic processing methods influence on soil agrophysical state and spring  wheat productivity. Shallow medium-loamy chernozem of  Krasnoyarsk forest-steppe was under study. The soil under basic  processing was characterized with normal composition (0.96–1.02 g/ сm3) and perfect structure of 0–20 сm layer on agronomical  valuable aggregates content (70–71 %). Experiment scheme  included three variants of tillage: dump plowing of black steam with  PLN- 4–35 to 20–22 cm depth (control); autumn disc harrowing of  black steam with Rubin 9600KU cultivator to 10–12 сm depth  (minimal processing); chemical steam and direct sowing with John  Deer seed drill (zero processing). There is established that basic  processing type defined the character of seasonal soil density dynamics (Сv=1–25 %) and structural composition (Cv = 28  %). Optimal wheat productivity was obtained under dump  plowing cultivation and minimal processing (24–25 c/ha). Direct  wheat sowing contributed to soil density increase by 0.06–0.04 g/ сm3 with optimal parameters maintenance and reduced spring  wheat productivity by 0.6–0.7 t/ha in comparison with the dump plowing and minimal processing