FIELD: agriculture.SUBSTANCE: agricultural tool has a working bar and a plurality of units for loosening the soil, coupled with the working bar. The working bar is adapted for connection to a towing vehicle. Each unit for loosening the soil contains auxiliary support, a disc, a scraper and a holder for attaching it to the adjacent disc, a seeding tube and a spring. The auxiliary support is arranged to be connected with the working bar. The disc is rotatably mounted on the auxiliary frame for forming furrow in the soil. The scraper has an edge for scraping the surface of the disc, the installation area, remote from the edge of the scraper, and is made with the ability to facilitate the maintenance of the open state of the furrow. The seeding tube is located adjacent the disk surface for throwing seeds into the furrow formed by the disc. The sowing tube is retained from the auxiliary support using the bracket. The scraper holder is attached to the sowing tube. The spring biases the scraper to the disc. The unit of the agricultural seeder comprises a connecting element, a disc, a scraper unit, a holder of the scraper for attachment the scraper adjacent to the disc, a seeding tube and a biasing element. The connecting element is fixed to a frame of the device. The disc is rotatably mounted on the connecting element for forming furrow in the soil. The scraper unit comprises a scraper having an edge for coming into contact with the surface of the disc and its scraping. The scraper has a mounting area, distant from the edge of the scraper, and is configured to facilitate the maintenance of the open state of the furrow. The seeding tube is located adjacent the disc surface to throw the seeds into the furrow formed by the disc. The seeding tube is retained from the connecting element by means of the bracket, and the holder of the scraper is attached to the seeding tube. The biasing element presses the scraper to the disc. The scraper unit comprises a frame, a disc, and also
