Response of hybrid rice to time of planting and plant density

A field experiment was conducted to study the effect of planting time and planting density on the performance of rice hybrids PA 6201 and PHB 71 during dry season. Experimental results revealed that the crop recorded significantly maximum plant height (70.9 cm), effective tillers m⁻²(8.13), leaf area Index (5.13), leaf area duration (252.9 days), dry matter production hill⁻¹(34.41 g hill⁻¹), root volume (26.1cc hill⁻¹), root weight (3.83 g hill⁻¹), crop growth rate (26.07 g m⁻² day⁻¹), relative growth rate (64.79 mg g⁻¹day⁻¹), net assimilation rate (7.37 g m⁻² leaf area day⁻¹), panicle length (26.1 cm), fertile spikelets panicle⁻¹(106.7), 1000 grain weight

(23.07 g) and finally grain yield 5.87 tha^-1when planted on January, 01. The highest net monetary return (Rs. 14432/- hectare^-1) and B:C ratio (1.63) were obtained irrespective of varieties planted on January 01 at 15 x

15 cm plant spacing.