Grain yield and agronomic traits in soybean according to crop rotation systems

Abstract

The effects of crop rotation systems (CRS) on soybean yield and agronomic characteristics were evaluated from 1996/1997 to 2010/2011 at Embrapa Trigo, Passo Fundo (RS), Brazil. Four soil management systems (SMS) were compared, namely: 1) no tillage, 2) minimum tillage, 3) conventional tillage using a disk plow and a disk harrow, and 4) conventional using a moldboard and a disk harrow -and three CRS: system I (wheat/soybean), system II (wheat/soybean and common vetch/corn or sorghum) and system III (wheat/soybean, white oats/soybean and common vetch/corn or sorghum). This is a split-plot, randomized, complete block design with three replications. SMS were assigned in the main plot and CRS systems in the split-plots. This work addressed only data on crop rotation systems. There were no significant differences between the CRS for number of grains per plant, 1,000 grain weight and first pod height in soybean. The crop rotation for a summer, with corn or sorghum, propitiates a higher soybean yield compared with the other systems and monoculture soybean. The combination of conservation systems (no tillage and minimum tillage) and CR resulted in a higher soybean yield. The lowest grain yield and grain weight per plant were obtained in monoculture soybean.

Influence of Drainage Methods on Soybean Development in Lowlands

“…Broad base ridges of 15.0 and 22.5 m were placed at the intermediate position, while surface drainage was inferior to the other treatments. These results are inferior to those observed by Santos et al (2014), who found mean values of plant height of 86 cm over 14 growing seasons. Again, there is the occurrence of damage resulting from precipitations below the climatological normal in the 2014/2015 season.…”

Soybean Spatiotemporal Yield and Economic Variability as Affected by Tillage and Crop Rotation

“…In general, soybean in rotation with cereals results in higher yields than monoculture soybean (Santos et al, 2014;Stanger et al, 2008). This study showed that average soybean yields were higher in C-C-S than in C-S in the majority of locations (Table 5).…”

Biological Quality Indicators of a Haplortox Soil Under Different Management Systems in Southern Brazil

“…In the studies by Santos et al (2014), in area with coverage plants, no difference was observed in the soybean grain yield during the period when the study was carried out, 1996/1997 to 2010/2011. Santos et al (2013), found no significant difference between coverage plants, as for the grain yield, however, after the vetch crop, the soybeans that were planted obtained the highest number of pods, number of grains and grain mass per plant than those that were sown in the other systems.…”