Performance of Clusterbean (Cyamopsis tetragonoloba L.) Varieties under Different Temperature and Relative Humidity Profiles

A study was performed at Department of Plant Pathology during year 2020, CCS Haryana Agricultural University to find the effect of different growing environments on temperature and humidity profile development, yield and its attributes in clusterbean crop. Three varieties of clusterbean varieties i.e. HG 365 (V1), HG 563 (V2) and HG 2-20 (V3) with each sown at three different dates of sowing i.e first (D1), third (D2) and fourth (D4) week of July in factorial randomized block design and replicated thrice. The diurnal range of temperature profiles at the emergence stage and flowering stage were higher in the crop sown in the first fortnight of July as compared to the second and third fortnights of July. Crops sown in the fourth week of July had a greater diurnal range of relative humidity profiles at the vegetative and pod formation stage while at flowering stage higher diurnal variation  were present in first week of July sown crop. However, among different cultivars of clusterbean, no variation in temperature and humidity profile were observed. Significantly higher number of branches per plant, number of pods per plant, pod length, number of seeds per pod, harvesting index, grain and straw yield were found in D1 (first week of July) and V2 (HG 563)  as compared to remaining dates of sowing and varieties, respectively.