Agrarian technology of the spring wheat after soybean predecessor in forest-steppe agro landscape in Western Siberia
Currently in the region are expanding the valuable sowing of high-yielding crops as soybeans (about 6 thousand hectares) after that planted mostly spring wheat. However, features of technology of crop cultivation after soybean predecessor are insufficiently studied. The spring wheat is the leading cereal crop in forest-steppe zone of Omsk region and occupies a total area of 430 thousand hectares. It is mainly cultivated in the field of short - rotation crop rotations with bare fallow with occupation of two or three fields. Re-seeding culture occupies up to one third of the area (about 150 thousand hectares). However, spring soft wheat demands of the terms of till. The highest harvests of spring soft wheat are obtained at the sufficient provision of this plants moisture and mineral elements with protecting of sowing from weeds, wreckers and illnesses. The soy is a leguminous culture and good predecessor. Nitrogen-rich stubble and root residues, reduced weed infestation agrophytocenosis with recommended technology of herbicides to allows get high yields spring wheat after soybean sowing - more than 2 t/ha. Due to the biological abilities of soy it is improve the quality of the crop rotation enriching the soil with nitrogen and improve the water-physical properties. A good quality grain can be obtained only by science-based technologies of spring soft wheat cultivation after soybeans in the system of adaptive-landscape agriculture. It is also needed to optimize the combination of the predecessor and the tillage systems with using of the chemicals facilities in the complex. That contributes to improving the technological properties of grain in all soil treatment systems, including gluten from 23.4 to 27.4 %.