Abstract
The article presents the research results of the sowing process (Norway spruce seeds) using a sowing machine under various modes of its operation. It has been established that the rotation frequency of sowing tools has a significant impact on the sowing rate of Norway spruce seeds and the uniformity of their distribution in the sowing line. The rate of spruce seed sowing and the uniformity of their distribution in the sowing line are determined. It is understood that rotation frequencies of sowing tools are 4.3, 7.0, 10.5 and 14.5 rpm and the forward speed of the unit is 900 m/h. To meet the requirements of growing spruce seedlings according to the generally accepted technology (with a seed sowing rate of about 50 kg/ha (1.5 g/m) the rotational speed of sewing machines should be 10.5 rpm. The rotational speed of sewing machines is recommended to be equal to 7.0 rpm when growing large spruce seedlings in the nursery with a seed sowing rate of about 24 kg/ha (0.7 g/m) Rational modes of operation sewing machines have been substantiated. These modes provide existing and advanced technologies for growing spruce seedlings in forest nurseries.
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