Information on the use of seeders for sowing seeds of agricultural crops and their converted experimental seeders for sowing unseeded seeds is given in this article. It has been shown that such sowing units do not fully meet the agro technical requirements for sowing unseeded seeds. Most of the research focused on the issues of unloading seeds from the bunker, but did not study the laws of their movement inside the bunker. The authors have proposed a separate two-section hopper for the seeding row of the seeder when sowing unseeded seeds of fodder plants in deserts. Inside the two-section hopper of the proposed seeder, mathematical expressions are set that make it possible to determine the regularity of the movement of unseeded seeds and the time of their fall.