Abstract
Soybean has great importance in world economy. Their productivity is influenced by numerous factors like nutrition, pests, diseases, genetic factors, and weather and plant density to name a few, and the spatial distribution of plants per area a resource to increase productivity the aim of this study was to evaluate main items of productivity and soybean yield with different arrangements of plants with spacing (0.25 and 0.50 m), and population density of plants per unit area (351,000, 310,000, 270,000, 229,500 plants per hectare). The experiment was conducted in agricultural year 2013/2014, with cultivar CD 2610 IPRO® with determined type of growth and CD2611 IPRO® with indeterminate type of growth. The experiment design was conducted in a randomized block design with split-plot, containing three repetitions and for statistical analysis, we used Assistat program in sub-divided form. The two varieties tested showed significant results in 0.25 m space between plants with a density of 351,000 plants per hectare. Key words: Arrangement, Glycine max, densities, growth.
Highlights
Soybean (Glycine max) is a legume grown in almost all arable regions
Soybean has great importance in world economy. Their productivity is influenced by numerous factors like nutrition, pests, diseases, genetic factors, and weather and plant density to name a few, and the spatial distribution of plants per area a resource to increase productivity the aim of this study was to evaluate main items of productivity and soybean yield with different arrangements of plants with spacing (0.25 and 0.50 m), and population density of plants per unit area (351,000, 310,000, 270,000, 229,500 plants per hectare)
According Pitelli (1985), factors that influence interference degree of a weed plant in crop may related to weed community, culture and environment.The major advantages observed with reduced spacing, compared to commonly used (40 to 50 cm) are verified in delayed sowing using early cultivars (Johnson et al, 1982), and fertility soils at suitable levels (Ventimiglia, 1996).The aim of this study was evaluate main components, and soybean yield productivity, with different plants arrangements of two varieties: one with a determined type of growth
Summary
Soybean (Glycine max) is a legume grown in almost all arable regions. Their large number of varieties adapted for macro and micro regions, leads crops to have diversity in climatic demands, allowing its exploitation inSouth and North America, Asia, Africa, Europe and Oceania. Soybean (Glycine max) is a legume grown in almost all arable regions. Their large number of varieties adapted for macro and micro regions, leads crops to have diversity in climatic demands, allowing its exploitation in. The plant population is the factor that least affects productivity, since plants were distribute uniformly in the area (Endres, 1996; Luca and Hungria, 2014).The spacing between lines and density among plants can be manipulated in order to establish a more suitable arrangement to obtain higher productivity. Soybean plants can provide great flexibility in response to different spatial arrangements, and can adapt to large-scale environmental managements (Heiffig, 2002; Heiffig et al, 2006). The same author obtained for smaller spacing a better and faster lock between lines, providing better control of weeds
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