Cause and Effect Estimates on Corn Yield as a Function of Tractor Planting Speed
Luiz Leonardo Ferreira *
Unidade de Biociências, Centro Universitário de Mineiros, GO, Brazil.
Gabriel de Souza Araújo
Unidade de Biociências, Centro Universitário de Mineiros, GO, Brazil.
Ivan Ricardo Carvalho
Departamento de Ciências Agrárias, Universidade Regional do Noroeste do Estado do Rio Grande do Sul, RS, Brazil.
Gildomar Alves dos Santos
Unidade de Biociências, Centro Universitário de Mineiros, GO, Brazil.
Marilaine de Sá Fernandes
Unidade de Biociências, Centro Universitário de Mineiros, GO, Brazil.
Ariana Bertola Carnevale
Unidade de Biociências, Centro Universitário de Mineiros, GO, Brazil.
Carmen Rosa da Silva Curvêlo
Departamento de Agronomia, Instituto Federal Goiano, IF Goiano, Urutaí, GO, Brazil.
Alexandre Igor de Azevedo Pereira
Departamento de Agronomia, Instituto Federal Goiano, IF Goiano, Urutaí, GO, Brazil.
*Author to whom correspondence should be addressed.
Abstract
The objective of this work was to explain the cause and effect estimates on corn yield as a function of planting speed. The study was conducted from January 21 to June 15, 2019, at Fazenda Invernadinha, rural area of the municipality of Mineiros, GO, Brazil. The experimental design consisted of randomized blocks, corresponding to five tractor planting velocities (4, 6, 8, 10 and 12 km h-1), in 4 replicates, where each plot consisted of 8 300 m long lines spaced at each 0.9 m, for a population of 60.000 plants ha-1. Sowing was carried out in no-till system after soybean harvest. A John Deere tractor and planter assembly were used, models 7715 (182 hp horsepower) and 2115 CCS Vacumeter (8 rows of 0.9 m respectively) with 30-hole 30 mm seed discs. Data were submitted to the assumptions of the statistical model, verifying the normality and homogeneity of the residual variances, as well as the additivity of the model. The analyzes were performed in the Rbio R interface, besides the Genes Software. It was concluded that the plant population is the variable that most influences the cause and effect estimates on corn yield. For high corn yields it is recommended that the tractor planting speed be adjusted to 6 km h-1.
Keywords: Sowing, planting, plant population, Zea mays