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The main goal of this article was to evaluate, at field conditions, the performance of a seeder-fertilizer in the initial establishment and the sorghum culture productivity according to tractor working speed and seed deposition depth. This study was conducted at the Experimental Farm in São Gonçalo dos Campos, located in the municipality of São Gonçalo dos Campos, BA, which belongs to the Veterinarian Medicine and Animal Science School of the Federal University of Bahia UFBA. It was adopted factorial scheme methodology 3x3 in CDR (Completely Randomized Design) or Dic (Delineamento Inteiramente Casualizado) in Portuguese, with 36 experimental unities with three displacement speed (4, 6, and 8 km h-1), and three sowing deposition depths (0.01, 0.03 and 0.05 m). The real seed deposition, the Plant Height at 30, 60, and 90 days, as well as the productivity per m2 after 90 days, were assessed. The working speed did not influence (P> 0.05) the evaluated parameters. The sowing depth did not change (P> 0.05) the crop productivity; however, it did influence the actual seeds deposition and the plants height on the first two cuts. Sowing at speeds from 4 to 8 km h-1 and planting from 0.01 to 0.05 m depths do not influence the sorghum crop productivity. Thus, it is recommended to carry out planting at a speed of 8 km h-1 with a depth of 0.05 m.

SORGHUM CULTURE INITIAL ESTABLISHMENT BASED ON SOWING MACHINES WORKING SPEED AND FURROWING MECHANISMS