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Subject: Agricultural Meteorology × Author: Ankit × Start date: 1992 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Analyzing spectro-thermal characteristics and their relationship with yield in mustard
    (CCSHAU, Hisar, 2023-08) Ankit; Anurag
    Field experiment entitled “Analyzing spectro-thermal characteristics and their relationship with yield in mustard” was conducted during rabi season (2022-23) at Department of Agricultural Meteorology, CCS HAU, Hisar located at 29º 10´ N latitude, 75º 46´ E longitude and 215.2 m altitude. The experiment was put in a randomized complete block design and comprised of two irrigation environments viz. irrigated and non-irrigated and three sub plot treatments comprising three varieties viz. V1 (RH 725), V2 (RH 749) and V3 (RH 761) and with four replications. Results revealed that Irrigated crop and RH 749 took a greater number of days to attain physiological maturity in the crop season. Highest GDD, HTU and PTU were recorded in irrigated conditions and RH 749 from seedling emergence to physiological maturity during the crop season. The spectral reflectance in blue, green and red band was observed maximum under non-irrigated conditions except NIR band. All the spectral indices i.e., NDVI, EVI, IPVI, DVI, Green NDVI, MSAVI2, WBI and NDWI were observed maximum in irrigated conditions except GRVI. All the greenness-based indices (Green NDVI, GRVI, DVI, IPVI and NDWI) were significantly correlated with yield during the early stages of crop growth whereas, all the water-based indices (WBI, MSAVI2 and NDWI) were significantly correlated with yield during the later stages of crop. Highest regression coefficient with spectral indices was recorded with yield followed by the crop canopy temperature, leaf area index and dry matter. Higher plant height was recorded in irrigated crop and RH 761 variety during the crop season. Maximum dry matter was observed in irrigated conditions and RH 749 during the crop season. Maximum LAI and chlorophyll content were recorded in irrigated crop and RH 761 and RH 749 respectively, during the crop season. LAI and chlorophyll content increased with the advancement of crop growth stages and reached maximum at 50 % flowering stage and then gradually decreased up to physiological maturity. Test weight, number of siliquae per plant, number of seeds per siliquae, seed yield, straw yield, biological yield and harvest index were observed highest in irrigated conditions during the crop seasons.