Vol. 11, Issue 12 (2022)

The result revealed that sowing in 26^th MW (D₁) and Bt. cotton hybrid i.e., Ajeet-05 with 150 to 225 percent planting density recorded maximum friction of photo synthetically active radiation (PAR), lowest friction of transmitted PAR and canopy temperature with high canopy temperature depression and greater to greater tolerance to environment stress with comparative to MCS-245 and Ajeet-05 recorded significantly higher number of picked bolls, boll weight, higher seed cotton weight and harvest index (17.24 bolls/plant 3.65 g, 12.13g. and 37.96) as compared to MCS-245. However, Ajeet-05 registered significantly higher seed cotton yield, cotton stalk yield and biological yield (1944 kg ha^-1, 3172 kg ha^-1 and 5116 kg ha^-1) than MCS-245, normal plant density recorded higher number of picked boll plant^-1, seed cotton weight plant^-1 (20.29 boll plant^-1 and 75.91 g plant^-1), which are significantly more over high plant density of 150 and 225 percent of normal population.

However, normal planting at 150 and 225 percent populations was recorded being at par high density planting (225 percent of normal density) produced maximum seed cotton yield, cotton stalk yield and biological yield i.e., 2024 kg ha^-1 3296 kg ha^-1 and 5320 kg ha^-1 was pertaining, whereas high density plating at 225 percent of least density produced maximum harvest index (38.00%) which are significantly higher than 100 percent and statistically at par with high density planting of 150 percent.