Assessment of agrotechnical indicators of the seeder for sowing grass seeds

    Mechanization in agriculture & Conserving of the resources, Vol. 66 (2020), Issue 3, pg(s) 90-93

    Field laboratory tests of the seeder under development with the intellectual control unit for the technological process of sowing non-loose grass seeds, consisting of a frame, seed box with sowing devices, attachment, sowing section, running gear and sowing device drive, were carried out on the territory of the University’s research and production campus, which was divided into plots 37 * 3,6 m in size.
    The following parameters were adopted for the breadboard model of the seeder: speed of movement 7 km / h; seed placement depths of 2 and 4 cm. Aisle spacing of 30 cm was taken. The maximum and minimum seeding rate for the selected crop was defined.
    An analysis of laboratory tests of the seeder showed that the sowing ability of the seeder is 8-30 kg / ha, while the unevenness of the sowing was 4,60% when sowing grain and 4,80% when sowing the awnless bun. The instability of the total sowing is 2,90% when sowing wheat grass and 2,7% when sowing the awnless bun.
    The field germination of “Burabay” wheatgrass seeds in experimental plots amounted to 90%, and on the plot sown with awnless bun “Akmolinsky Emerald”, the germination rate was 89%; the uniformity of the seeding depth of the seeds of the prototype seeder is 6,28% in the sowing of wheatgrass, and the sowing of the awnless bun is 5,78%; the number of seeds embedded in the layer of average actual depth and two adjacent layers on the sowing of wheatgrass was 91% and on the sowing of awnless bun is 90%, which corresponds to agro technical requirements; when testing a prototype planter of the seeder, the distribution of seeds over the feeding area was 62% for the sowing of grain and 64% for sowing of the awnless bun.
    An analysis of the results of laboratory field tests of the seeder showed that, according to the quality indicators of the technological process, the developed seeder meets the agro technical requirements for grass sowing and is not inferior to foreign seeders and it is necessary to conduct its extended field tests.


    The analysis of power expenditure of a wide-cut seeder for the performance of the technological operation

    Mechanization in agriculture & Conserving of the resources, Vol. 66 (2020), Issue 2, pg(s) 48-49

    During the operation of the tractor unit in field operations, not all the power developed by the tractor engine is effectively spent on useful work.
    To use the tractor power effectively, reduce or eliminate its useless losses, the article considers the tractor power balance, showing the distribution of effective power among the individual components for traction and driving their working details. According to theoretical studies, it was found that the traction resistance of a wide-seeder with clutch openers consists of two components; this is the resistance of the hopper to movement and the resistance of the filling part
    It was found that traction resistance will decrease as the hopper empties. The pulling resistance of the embedment is made up of several components, with the maximum permissible working speed of the unit, the maximum embedment depth and the highest seed sowing rate, the required power to perform the sowing process is obtained within 120 kW (163, 155 h.p), excluding the tractor power for raising or lowering the side sections of the sealing part. The total power consumption is distributed as follows: 90,8% to overcome the traction resistance of the wide seed drill, 9,1% for the fan hydraulic drive, and the remaining 0,1% for the electric meter.
    To reduce the amount of required power for the sowing process, it is necessary to work in the direction of reducing the seeder mass and improving the design parameters of working coulters.