Climate period		Air temp. (˚C)			Evap. (mm∙d⁻¹)	Surface soil temp. (˚C)		Sunshine duration (h∙d⁻¹)	Humidity (%)
		Max.	Min.	Max.-Min^♦.	Evap. (mm∙d⁻¹)	0600 h	1800 h	Sunshine duration (h∙d⁻¹)	Max.	Min.
		(X₁)	(X₂)	(X₃)	(X₄)	(X₅)	(X₆)	(X₇)	(X₈)	(X₉)
0^#	Retention ratio•	−0.05	−0.03	−0.03	−0.10	−0.11	0.10	0.20	−0.04	−0.02
	No. of bolls	−0.03	−0.07	−0.01	−0.53^**	−0.06	−0.16	−0.14	0.37^**	0.10
1	Retention ratio	−0.07	−0.08	−0.01	−0.10	−0.16	0.04	0.15	0.04	0.05
	No. of bolls	0.02	−0.08	0.08	−0.49^**	−0.09	−0.05	−0.20	0.35^**	0.09
2	Retention ratio	−0.08	−0.14	0.02	−0.08	−0.19	0.03	0.17	0.02	−0.02
	No. of bolls	0.02	−0.04	0.07	−0.46^**	−0.06	−0.01	−0.19	0.33^**	0.09
3	Retention ratio	−0.09	−0.21	0.06	−0.08	−0.24^*	0.02	0.19	0.01	−0.10
	No. of bolls	0.03	−0.03	0.06	−0.44^**	−0.04	0.05	−0.18	0.32^**	0.08
4	Retention ratio	−0.05	−0.20	0.09	−0.01	−0.24^*	0.01	0.22	0.00	−0.15
	No. of bolls	0.01	−0.05	0.05	−0.40^**	−0.03	0.04	−0.16	0.31^*	0.08
5	Retention ratio	−0.03	−0.21	0.13	0.07	−0.25^*	0.00	0.26^*	−0.02	−0.22
	No. of bolls	0.00	−0.07	0.05	−0.37^**	−0.02	0.03	−0.13	0.29^*	0.07
6	Retention ratio	0.01	−0.19	0.15	0.12	−0.24^*	0.02	0.27^*	−0.03	−0.20
	No. of bolls	−0.01	−0.08	0.04	−0.38^**	−0.02	0.04	−0.15	0.31^*	0.13
7	Retention ratio	0.05	−0.17	0.17	0.18	−0.25^*	0.05	0.29^*	−0.02	−0.21
	No. of bolls	−0.03	−0.09	0.03	−0.39^**	−0.04	0.06	−0.14	0.34^**	0.18
8	Retention ratio	0.06	−0.08	0.13	0.21	−0.20	0.07	0.28^*	−0.06	−0.19
	No. of bolls	−0.05	−0.07	−0.01	−0.35^**	−0.02	0.02	−0.17	0.28^*	0.17
9	Retention ratio	0.08	0.00	0.08	0.26^*	−0.14	0.08	0.29^*	−0.12	−0.20
	No. of bolls	−0.08	−0.06	−0.05	−0.33^**	−0.01	0.00	−0.23	0.20	0.16
10	Retention ratio	0.06	−0.02	0.05	0.27^*	−0.13	0.09	0.27^*	−0.10	−0.08
	No. of bolls	−0.11	−0.10	−0.07	−0.34^**	−0.03	−0.03	−0.19	0.18	0.21
11	Retention ratio	0.04	−0.04	0.08	0.28^*	−0.12	0.08	0.26^*	−0.09	−0.05
	No. of bolls	−0.18	−0.18	−0.06	−0.37^**	−0.10	−0.04	−0.14	0.15	0.28^*
12	Retention ratio	0.02	0.01	−0.08	0.32^**	−0.05	0.05	0.25^*	−0.08	−0.03
	No. of bolls	−0.17	−0.13	−0.08	−0.32^**	−0.06	−0.07	−0.11	0.16	0.24^*
13	Retention ratio	−0.04	0.04	−0.09	0.38^**	0.00	0.01	0.27^*	−0.09	−0.02
	No. of bolls	−0.15	−0.09	−0.09	−0.29^*	−0.03	−0.10	−0.08	0.18	0.20
14	Retention ratio	−0.07	0.04	−0.13	0.34^**	0.06	−0.02	0.18	−0.08	−0.01
	No. of bolls	−0.15	−0.10	−0.10	−0.28^*	−0.01	−0.1	−0.15	0.17	0.17
15	Retention ratio	−0.13	0.03	−0.18	0.33^**	0.09	−0.04	0.06	−0.07	0.00
	No. of bolls	−0.16	−0.1	−0.11	−0.28^*	0.00	−0.11	−0.13	0.17	0.15