Vol. 10, Issue 11 (2021)

Author(s):
E Anusha, KB Suneetha Devi, O Sampath and G Padmaja

Abstract:
A field experiment was conducted at College farm, Agricultural College, Polasa, Jagtial, PJTSAU, during the kharif season of 2018 to study the ʻʻEvaluation of varieties at varied crop geometry for yield maximization in Soybeanʼʼ The experiment was laid out in split-plot design with three replications to evaluate the performance of promising varieties of soybean (V₁- Basar,V₂- JS 335, V₃- KDS 756 and V₄- MACS 1281) and to standardize the crop geometry for Soybean varieties (S₁- 45 x 10 cm, S₂- 30 x 10 cm, S₃- 45 x 05 cm and S₄- 35 x 05 cm) under rainfed semi arid conditions of Telangana. The results indicated that among the four varieties tested, plant height, dry matter production, leaf area, SPAD chlorophyll readings, number of branches plant^-1, number of root nodules plant^-1, dry weight of root nodules plant^-1, crop growth rate (CGR) and relative growth rate (RGR) of KDS 756 variety was significantly higher as compared to other varieties followed by Basar, MACS 1281, respectively. JS 335 showed inferior performance regarding to growth parameters. Growing degree days and photo thermal units were higher with the variety Basar followed by MACS 181, KDS 756 and JS 335. Among crop geometry 30 x 10 cm recorded higher observations on growth parameters followed by 45 x 05 cm, 30 x 05 cm and 45 x 10 cm, respectively. Dry matter production was higher under closer crop geometry of 30 x 05 cm followed by 45 x 05 cm, 30 x 10 cm and 45 x 10 cm due to higher plant population per unit area.