Table 2. Comparison of climate variables between before and after silking stage to check seasonal effect by t-test with 5% significance level

Variables	Mean		Difference	SE	p-value
	Seeding-silking	Silking-harvesting
Growing degree days (°C)	780.95	620.62	160.33	8.09	< 0.05
Highest temperature (°C)	30.45	33.86	−3.41	0.06	< 0.05
Lowest temperature (°C)	10.33	18.38	−8.05	0.05	< 0.05
Soil surface temperature (°C)	21.80	26.78	−4.98	0.03	< 0.05
Relative humidity (%)	68.24	77.57	−9.33	0.14	< 0.05
Rainfall amount (mm)	232.19	664.89	−432.71	8.53	< 0.05
Wind speed (m/s)	1.84	1.86	−0.01	0.01	0.24
Sunshine duration (hr)	196.58	147.32	49.26	1.34	< 0.05