Vol. 12, Special Issue 7 (2023)

Author(s):
D Sharmah, Chayanika Thakuria and S Paul

Abstract:
The present field demonstration was conducted for three consecutive years during 2019-20, 2020-21 and 2021-22 under Krishi Vigyan Kendra (AAU), Dibrugarh, Assam, India to assessed four rice-based cropping system under rainfed medium land situation of Dibrugarh district of Assam. The highest land use index (62.74%) was observed in winter Rice-Toria cropping sequence followed by winter Rice-Potato sequence (61.37%). The Rice-Potato cropping sequences provided the most employment generation (316 man days ha^-1) followed by winter Rice-blackgram sequence (280 man days ha^-1). The highest rice equivalent yield (152.04 q ha^-1) was recorded in potato grown during rabi after rice followed by blackgram (75.34 q ha^-1). A significant productivity efficiency was found in winter Rice – potato sequence (67.88 kg ha^-1 day^-1), followed by winter Rice–blackgram sequences (34.56 kg ha^-1 day^-1). The economic efficiency was found significant in Rice–potato (770.13 ha^-1 day^-1) followed by winter Rice–blackgram sequences (395.40 ha^-1 day^-1). The maximum gross return (298.27 ha^-1) and net return (172.51 ha^-1) were observed in case of winter Rice– potato sequence. The highest benefit: cost ratio (1:2.37) was recorded in winter rice-potato sequence. The highest relative economic efficiency over winter rice-fallow was recorded in winter rice-potato (231.58%) followed by winter rice-blackgram cropping sequence (65.68%).