CORN YIELD COMPONENTS ACCORDING TO THE SOIL MANAGEMENT SYSTEM

Abstract

Management systems and sowing speed can impact the establishment, development, and productivity of crops of economic interest. Thus, this study aimed to assess second crop corn yield components according to the soil management system in two growing seasons. The experiment was carried out in a randomized block design in a split-plot scheme in one of the years due to the introduction of the sowing speed factor, with four replications. Six management systems were distributed in the plots (plowing plus two harrowing operations, harrowing, no mobilization, chiseling, cross-chiseling, and chiseling plus harrowing) and four speeds in the subplot (3.0, 4.7, 6.1, and 6.7 km h⁻¹) during corn sowing operation only in the first year. The analyzed variables: plant stand, longitudinal distribution of seedlings, stem diameter, plant height, first-ear insertion height, and productivity. The data were submitted to analysis of variance, and when significant, the Tukey test was applied. The studied management systems showed no effect on plant stand, longitudinal distribution, and yield components (stem diameter, plant height, and first-ear insertion height). Productivity was influenced by systems of high soil mobilization, such as plowing and chiseling, and travel speed. Travel speed also interfered with the longitudinal distribution and plant stand.