Table 1.

Environmental conditions at a representative field site in the target region of interest, and the mean temperature and relative humidity in the two growth rooms during the time of the two experiments (mean ±SE)

The average temperature (°C)				Temperature and relative humidity (RH) in growth room (cyclic drought) in the field: Minnipa (1915–2004)
Month	Max/min	Temperature (°C)	Growth period	Day/night (12/12 h)	Temperature (°C)		RH (%)
					Exp. I	Exp. II	Exp. I	Exp. II
Jun–July	Max.	16.4	Weeks 1–4	Day	15.8±0.1	16.5±0.5	68.3±1.1	50.0±0.5
	Min.	6.9		Night	3.7±0.2	6.0±0.3	82.2±1.3	83.9±0.1
August	Max.	17.3	Weeks 5–8	Day	17.8±0.2	18.3±0.2	74.0±0.7	45.0±0.5
	Min.	6.7		Night	5.8±0.2	7.5±0.3	81.1±0.4	72.3±0.4
Sept–Oct	Max.	22.3	From week 9 to maturity	Day	24.7±0.2	23.8±0.2	63.2±0.9	55.6±0.4
	Min.	9.1		Night	9.6±0.1	9.5±0.3	78.7±0.7	81.4±0.8
Average	Max.	18.7	Average	Day	18.2±0.3	19.5±0.3	66.1±0.6	50.2±0.4
	Min.	7.6		Night	7.4±0.2	7.7±0.3	81.6±0.6	79.2±0.5