Dutta, RinjumoniMedhi, Dhabanita2020-11-032020-11-032019-07https://krishikosh.egranth.ac.in/handle/1/5810154264A field experiment entitled ‘Performance of baby corn varieties under different levels of fertilizers during summer season’ was conducted at the Instructional-cum- Research (ICR) Farm, Assam Agricultural University, Jorhat during the summer season of 2018 to find out a suitable variety and a suitable fertilizer dose required for baby corn cultivation. The experiment consisted of three baby corn varieties viz., VL Baby corn-1(V1), CMVL Baby corn -2(V2) and G-5414(V3) and four fertilizer levels viz., 60- 40-40 N-P2O5-K2O kg/ha (F1), 75-50-50 N-P2O5-K2O kg/ha (F2), 90-60-60 N- P2O5- K2O kg/ha (F3) and 105-70-70 N-P2O5-K2O kg/ha (F4). The treatments were laid out in split plot design and replicated thrice with varieties in the main plot and fertilizer levels in the sub-plot. The soil of the experimental site was sandy loam in texture, acidic in reaction (pH- 5.15), medium in organic carbon (0.68%), low in available N (198.19 kg/ha), medium in available P2O5 (27.48kg/ha) and available K2O (158.23 kg/ha). Experimental findings revealed that among the three varieties tested, CMVL Baby corn -2 recorded the highest plant height which was at par with G-5414. VL Baby corn -1 took lesser days for tasseling, silking and harvest initiation compared to G-5414 and CMVL Baby corn -2. Number of cobs per plant, cob girth and weight of each cob with and without husk was higher for G-5414 whereas cob length was higher for CMVL Baby corn-2. Cob yield both with and without husk was the highest for G-5414 i.e. 86.07 q/ha and 18.78 q/ha respectively, whereas CMVL Baby corn-2 recorded the highest green fodder yield (247.02 q/ha) which was at par with G-5414 (244.96 q/ha). The total N, P and K uptake was recorded the highest for G-5414. Application of different levels of fertilizer doses showed significant effect on plant height which was recorded the highest with the application of 105-70-70 N-P2O5- K2O kg/ha. The number of green leaves, dry matter production and LAI as well as yield attributing characters like number of cobs per plant, length and weight of the cob with and without husk as well as cob yield with husk (89.07 q/ha) and without husk (18.39 q/ha) and green fodder yield (249.99 q/ha) were recorded the highest with the application of 105-70-70 N-P2O5-K2O kg/ha but was at par with the application of 90- 60-60 N- P2O5-K2O kg/ha. The highest nutrient content and total uptake was obtained with the application of 105-70-70 N-P2O5-K2O kg/ha which was at par with 90-60-60 N- P2O5-K2O kg/ha. Application of 105-70-70 N-P2O5-K2O kg/ha recorded significantly higher available N, P2O5 and K2O (kg/ha) in the soil after harvest over rest of the treatments. In terms of economics, the highest gross returns (`174746.62), net returns (`139895.63) and B: C ratio (4.01) were recorded with the variety G-5414. Application of 105-70-70 N-P2O5-K2O kg/ha resulted in the highest gross return (`172153.87) and net return (`135190.60) but the highest B: C ratio (3.73) was obtained from treatment 90-60- 60 N- P2O5-K2O kg/ha.EnglishThesis