Effect of sowing dates and varieties on soybean performance in Vidarbha region of Maharashtra, India

Abstract

Soybean production is widely fluctuating in response to agro-environmental conditions year to year in Vidarbha region. Weather variations are the major determinants of soybean growth and yield. It is also important to study the response of suitable soybean varieties to varying weather parameters. So a field investigation was carried out to study the crop weather relationship of soybean and to optimize the sowing date with different soybean varieties. The results revealed that soybean crop sown up to 27 th MW accumulated higher growing degree days (1640.5 0 C day), photothermal units (20498.1 0 C day hour) and recorded significantly higher seed yield (839 kg ha -1 ) and biological yield (2773 kg ha -1 ) with maximum heat use efficiency (0.51 kg ha -1°C day -1 ) and water productivity (2.49 kg ha-mm -1 ). Later sowings i.e. 30 th MW sowing caused decreased amount of rainfall and increased maximum temperature regime across the total growing period with consequently lower seed yield (530 kg ha -1 ), GDD (1539.2 0 C day), PTU (18689.9 0 C day hour), heat use efficiency (0.34kg ha -1 °C day -1 ) and water productivity (2.05kg hamm -1 ). Soybean variety TAMS 98-21 recorded significantly higher seed yield (734 kg ha -1 ) and highest biological yield (2649 kg ha -1 ) with maximum heat use efficiency (0.44 kg ha -1 °C day -1 ), GDD (1650.5 0 C day ) and water productivity (2.41 kg ha-mm -1 ). Thus, the results of this study illustrated the importance of early sowing with suitable variety of soybean and indicates that sowing upto 27 th MW with variety TAMS 98-21 is optimum for maximizing the yield in the Akola region of Vidarbha.

Planting precision: Investigating the soybean growth dynamics with different varieties and planting geometries

“…This phenomenon contributed to the observed increase in LAI. These findings resonate with the results reported by Vyas and khandwe (2014) [38] and Nath et al (2017) [23] . Planting geometry of 30 cm × 10 cm exhibited the highest leaf area index (4.45), followed by 37.5 cm × 10 cm (3.45) and 45 cm × 10 cm (2.53).…”

Response of Soybean [Glycine max L.] Varieties Grown Under Varying Inter Row Spacing in ManaSibu District, Western Oromia, Ethiopia

“…The highest above ground dry biomass (3010.2kg ha -1 ) was recorded at inter row spacing of 30cm and the lowest biomass (2773.1kg ha -1 ) was recorded at inter row spacing of 60cm (Table 5). In line with this finding, Nath et al (2017) indicated dry matter weight is attributed to their genetic potential rather than the effect of external weather parameters in soybean. According to Vanlauwe et al(2003) high biomass of soybean was obtained in late maturing varieties than in the early maturing.…”

“…And in Keyvan and Kobraee (2012) study also obtained highly significant variation was observed soybean varieties in response to grain yield. Nath et al (2017) described as seed yield was highly influenced by varieties.…”

Optimum Sowing Window and Suitable Varieties for Cultivation Soybean (Glycine max L.) During Off-Season in Northern Telangana Zone

“…Further, the least biomass accumulation (4.86 g plant -1 ) was recorded in 3 Dec (D5) sowing. The favourable weather conditions have positive influence on biomass accumulation was reported by several researchers [10,11,12,13]. Further Kumar et al [14] reported that early sowing provides long vegetative and reproductive growth periods thereby, facilitating the crop to produce more biomass and late sowings may produce lower biomass and yield due to a variety of reasons including shortening of growth period, less accumulation of photosynthetically active radiation and less number of heat units and helio-thermal units…”