Weather relation of rice-grass pea crop sequence in Indian Sundarbans

Abstract


 In order to develop weather-based yield prediction models for rice and grass pea in coastal saline zone of West Bengal, the experiments were conducted with rice (cv. CR 1017) and grass pea (cv. Bio L 212) in the rainy and winter seasons, respectively of 2016-17 and 2017-18. Rice was sown in nursery bed on six different dates starting from June 15 to July 19 at weekly interval in both rainy seasons in two different land situations viz. medium upland and medium lowland. Likewise, grass pea was sown on six different dates just before harvesting of rice. It was observed that both early sown rice and grass pea resulted in higher grain yield and took more time to mature under medium lowland situation irrespective of sowing dates. Correlation study revealed that air temperature during sowing to transplanting phase exhibited significant positive correlation with grain of rice in medium upland (Tmax = 0.76**, Tmin = 0.69*) and medium lowland (Tmax = 0.93**, Tmin = 0.81**) situations. On the other hand, maximum temperature and total solar radiation during 100% emergence to 100% flowering stage were negatively associated with the grain yield of grass pea in both medium upland (Tmax = -0.69*, Accumulated solar radiation = -0.73**) and medium lowland (Tmax = -0.74**, Acc. solar radiation = -0.77**) situations. Grain yield of rice and grass pea could be predicted with 94.4% and 87.4% predictability. Pre-harvest forecasting of grain yield was possible with 77.3% for rice and 83.8% for grass pea.

Mitigating Risk and Scaling-Out Profitable Cropping System Intensification Practices in the Salt-Affected Coastal Zone of the Ganges Delta

“…• Assessment of rainfall and temperature characteristics and assessment of agroclimatic potential (Ghosh et al, 2021;Maniruzzaman et al, 2024a;Yu et al, 2019;Sarkar et al, 2020a).…”

Evaluation of the APSIM Model in Rice-Lentil Cropping System in a Complex Coastal Saline Environment

“…When it came to rice, the depth of the stagnant water changed during the crop's growth from 2 to 5 cm, and the rice field was drained of water seven days before harvest. After that, Sarkar (2021) and Sarkar et al (2020d) have provided descriptions for overall management of crop standards, and other methods of agronomic management.…”