Evaluation of agronomic practices for soybean using computer simulation model- SOYGRO

A dynamic soybean growth and yield simulation model, SOYGRO- was used as a tool to evaluate various agronomic practices in soybean production under Punjab conditions. The comparison was made for simulated response of various dates of sowing, row spacing and plant to plant spacing for cv. PK-416 on soybean yields. The simulated results showed that the optimum date of sowing for soybean was 5^th June. However, earlier sowing (20^th May) and late sowing (20th June) of soybean may perform better if the plant-to-plant spacing decreased from 5.5 to 3.5cm. A decrease in plant -to- plant spacing from 7.5 to 3.5 cm and a decrease in row spacing from 60 to 35 cm, showed an increasing trend in soybean yield as simulated by the model.