Evaluation of yield gap vis-a-vis economic analysis of submergence tolerant rice variety in flood Agro ecosystem of Assam
Bagish Kumar, M Thoithoi Devi, Jugabrat Sarma, Purnima Saikia, Rajesh Kumar and G Kadirvel
Background: The climate change has hampered the rice cultivation due to increase in the frequency of flood. The riverine state of Assam is severely affected by floods almost every year during rainy season due to overflow of the Brahmaputra basin. This flooding is also a major contributor to the vulnerability due to loss of huge quantity of paddy cultivation area. Considering flooding as an important limiting factor, submergence tolerant rice variety Ranjit Sub-1 having submergence tolerance ability for a period of 15 days was developed by Assam Agricultural Univerity, Jorhat, Assam.
Methods: Frontline demonstrations on submergence tolerant rice variety Ranjit Sub 1 were conducted by Krishi Vigyan Kendras of flood prone districts of Assam for five consecutive years i.e. 2018-19 to 2022-23 under the supervision of ICAR-ATARI, Guwahati. The study area covered all the five agro-climatic zones of Assam. The primary data on grain yield, farmers’ practices etc. were collected from the beneficiary farmers through plot cutting methodology followed by personal interviews.
Results: It was found that the average yield of rice was higher in case of rice variety Ranjit Sub 1 as compared to local check in all the flood prone districts of Assam. When performance of Ranjit Sub 1 was analysed agro climatic zone wise, maximum yield of Ranjit Sub 1 was recorded in Central Brahmaputra valley zone (52.98 q/ha). The lowest yield of Ranjit Sub 1 was found in Barak Valley Zone (34.82 q/ha).
Bagish Kumar, M Thoithoi Devi, Jugabrat Sarma, Purnima Saikia, Rajesh Kumar, G Kadirvel. Evaluation of yield gap vis-a-vis economic analysis of submergence tolerant rice variety in flood Agro ecosystem of Assam. Int J Res Agron 2025;8(1):431-435. DOI: 10.33545/2618060X.2025.v8.i1f.2440
