The results of studying agronomic indicators of the Demetra selection seeder

Introduction. The technological operation of seed sowing is a main in the seed selecting and growing process. The correct execution is the most important agrotechnical requirement for seeding machinery for selecting and primary seed breeding. The purpose of the study is to determine the main agronomic indicators of the Demetra selection seeder. Materials and Methods. In the study, the methods of a full-scale experiment in laboratory and field conditions were used. The main agro technical indicators of the technological process of sowing seeds by a seeder were determined. Results. As a result of the study, there were determined the main agronomic indicators of the seeder such as its minimum and maximum productivity and the effective seeding rate, departure from the specified seeding rate, irregularity of seed sowing through the seed tubes, instability of total seed sowing, seed crushing, seed sowing depth at optimum coulter penetration depth, quantity of seeds embedded at the specified depth, ridge height after the aggregate passed, and number of sprouts and relative field germination rate. Discussion and Conclusion. It has been found that the Demetra seeder with high accuracy provides qualitative performance of sowing specified number of seeds with both the minimum (1.95 m) and maximum (32.92 m) length of the plot. The departure of the actual seeding from the specified seeding is 0.02-0.54% for different crops. Unevenness of seeding is 0.22-1.53% for different crops. At the same time, the instability of total seeding varied in the range of 0.1-1.1% for different crops. The height of ridges after the seeder passed is 2.6-3.0 cm. There were no seeds not embedded in the soil by the working bodies of the seeder. Relative field germination of cultivated crops is 82.3-96.9%.