In experiment 1, plants were
63, 42 and 23 days old for S1, $2 and $3, respectively
when soil water deficits developed with little
rainfall (27 mm) over a period of 23 days. In experiment
2, rainout shelters were used to exclude rain
falling on the plots for 32 days (MS) and for 34 days
(SS). There was one irrigation during the