The article presents three-year data on the productivity of spring durum wheat varieties in the European continental climate, in order to select the most promising of them and determine the possibilities of breeding and technological adaptation in the region. The experiment involved five varieties of spring durum wheat as B 200, B 205, B 209, B Niva, and Luch 25 taken from Russian Middle Volga regions. Indicators of the best productive bushiness were noted in varieties B Niva and B 209. It was found that the number and weight of seeds in the ear, depending on the variety, varied proportionally to the length of the ear. The best indicators of the structure of the crop were established in varieties B 209 and B Niva. The weight of 1000 seeds was 42.32 to 53.3 g for different varieties of durum wheat. Taking into account the biological yield, the advantage of the variety B Niva over the control variant was revealed. The best formation of grain gluten was observed in agroclimatic conditions in 2015 and 2016: for three years the best indicators of gluten was on average 30.4 %and 29.95%, respectively, for varieties B Niva and B 200.

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Mankind has long been interested in the growth of plants, even in the Middle Ages, Leonardo da Vinci observed the seasonality of growth and some features of plant forms. In recent years, many agricultural producers have begun to implement a coordinate (precise) farming system. In this regard, there is a need to improve methods for assessing and managing the growth of agricultural crops. To assess the functioning of the system “plant - soil - air [[CHECK_DOUBLEQUOT_ENT]] (P-S-A), the concept of plant growth potential is introduced, which is the ratio of the power spent on the formation of a unit of vegetation mass. The paper considers the theoretical prerequisites for determining the growth potential. Since the operational management of the formation of the crop yield is an important task in crop production, the functioning of the P-S-A system during the growing season is proposed to be evaluated by dimensionless coefficients, which represent the ratio of the substance mastered by plants to the incoming one. The product of these coefficients in terms of light-heat-food-gas-and moisture supply represents the reliability of the P-S-A system, and allows you to evaluate and effectively manage the technological process of the growth of cultivated plants during the growing season.

A cabbage combine harvester adapted to technological schemes of harvesting is proposed: bulk shipment of heads in the vehicle bed and shipment of heads on flexible flooring with a subsequent delicate packing in containers in the vehicle bed. The machine harvesting process of headed cabbage under the schemes will be efficient and sustainable with optimal composition of the staff engaged in correcting of the non-marketable cut heads on the combine harvester and rearranging from flexible flooring to containers on the vehicle. To do this, the processes are modeled based on the theory of mass service of operations. Therein, correcting of the cabbage heads is considered as a multichannel queuing system (QS) with refusals, and the process of shipment and stacking of cabbages heads in containers-as a delay queuing system. We determined the optimal number of operating staff involved with the correcting of heads n=2 pers., and stacking of cabbages in containers n=3 people. The results of the calculations are checked and confirmed under production conditions.