ECOLOGICAL VARIETAL TESTING OF SOYBEAN IN THE REPUBLIC OF TATARSTAN

The study of the formation of yield potential and protein content in soybeans of various ecological and geographical origin and the selection of varieties adapted to the conditions of the Republic of Tatarstan are relevant for the spread of crops in the cultivation areas. The work was carried out in the Kama region of the Republic of Tatarstan in 2022-2023, located at 55°7'44.9" north latitude and 49°16'37.48" east longitude. The scheme of the stationary field experiment provided for ecological variety testing of soybean varieties in years contrasting with meteorological conditions. The object of the study was five soybean varieties belonging to different geographical zones (Krasnodar Territory, Samara Region, Republic of Belarus, Chuvash Republic), with coordinates 45°2'41.3", 38°58'33.6", 53°12'0.4", 50°9'60", 54°22'59", 30°24'21", 56°7'55.9", 47°15'6.8". Milyausha soybeans were used as the standard. The soil of the experimental site is gray forest. The initial humus content was