AVALIACAO DA QUALIDADE DA SEMEADURA DIRETA DO MILHO EM FUNCAO DO AUMENTO DA VELOCIDADE DE DESLOCAMENTO E DO ESCALONAMENTO DE MARCHA DE UM CONJUNTO TRATOR-SEMEADORA-ADUBADORA/DISPLACEMENT SPEED AND THE GEAR SETTING OF A TRACTOR-SEEDER-FERTILIZER COMBINE AFFECTS QUALITY OF DIRECT MAIZE SOWING

• Published in: Engenharia na agricultura Vol. 20; no. 2; p. 95
• Main Authors: da Silveira, Joao Cleber Modernel, Fernandes, Haroldo Carlos, Leite, Daniel Mariano, Teixeira, Mauri Martins, Furtado Junior, Marconi Ribeiro
• Format: Journal Article
• Language: English
• Published: 01.03.2012
• Subjects: Displacement; Emergence; Engines; Gears; Maize; Motors; Seeds; Tractors
• ISSN: 1414-3984; 1414-3984

DISPLACEMENT SPEED AND THE GEAR SETTING OF A TRACTOR -SEEDER-FERTILI ZER COMBINE AFFECTS QUALITY OF DIRECT MAIZE SOWING This study was done to evaluate the quality of the maize sowing by a tractor-seeder-fertilizer applicator combine in no-tillage system, using different displacement speeds and motor shaft rotations. The experiment was conducted in randomized block design with four replications in a 4 x 3 factorial. The treatments consisted of four forward speeds, adjusted by gear schedules and three motor shaft rotations of the tractor. Operational speed, engine speed and slippage of the wheeled planter were monitored during sowing. Seed deposit depth, longitudinal seed distribution, seedling emergence velocity and mean emergence time were evaluated. The qualitative aspect of the sowing process showed that it is possible to opt for lower displacement speeds by gear scheduling and lower engine rotations, with best results obtained at the speeds between 3.5 and 5,0 km h super( -1).