THE EFFECTS OF TILLAGE METHODS AND PLANT DENSITY ON GROWTH, DEVELOPMENT AND YIELD OF SOYBEAN [Glycine max (L.) Merrill] GROWN UNDER MAIN AND SECOND CROPPING SYSTEM: II. GROWTH-DEVELOPMENT COMPONENT

Abstract

The aim of this study was to compare tillage methods and plant density on growth, development and yield of soybean [Glycine max (L.) Merrill] grown under main and second cropping systems. The field experiments were carried out at the experimental area of Agricultural Faculty, Dicle University during 2013 and 2014. The experiments were conducted as split-split plot design based on randomized complete blocks with two sowing dates (normal and late) as the main plot, three tillage methods (no-tillage, reduced and conventional) as sub-plot, and three between row spacing (35, 55 and 70 cm) sub-sub plot factor. The experiments were performed in three replications and soybean cultivar Nova (MG III) was used. According to the two-year average results of the study, tillage methods had significant effects on dry weight and leaf area index in the R5 phase of the tillage treatment and reduced soil tillage by soil application, lower dry weight and leaf area index (LAI) value than conventional tillage method. Leaf growth rate (LGR) and leaf area ratio (LAR) were found significant between early planting (0.13 cm(2)/cm(2) /day, 0.15 cm(2)/g) and late planting (0.09 cm(2)/cm(2)/day, 0.12 cm(2)/g).