Agrochernozems temperature regime during oil crops cultivation in Kansk forest-steppe

The research purpose was to study the agrochernozems temperature regime during the cultivation of spring rape (Brassica napus oleifera annua, Metzd.) and saffron camelina (Camelina sativa (L.) Crantz) in Kansk forest-steppe. Clay-illuvial typical medium-powerful and powerful agrocherno-zems dominate in the soil cover structure of key plots; different types of clay-illuvial podzolized agrochernozems are found on micro-lowering; cryogenic-micellar low-power agrochernozems are found on micro-elevations. The soils temperature regime in agrocenoses of oilseeds was studied with the help of thermometer “Bayer” in soil layers of 0-10 and 10-20 cm during the period from May to September on 4 trial plots allocated within each field. The data from the Solyansk agrometeorological station were used for the temperature regime comparative description of adjacent atmosphere. Measuring interval for soil temperature was 12-20 days. The studies showed that by the beginning of sowing oilseeds the 0-20 cm soil layer temperature did not reach stable transition through 5 °C, although the air warmed up to 9 °C...