Fig. 1

Curve relating the soil weight/dried soil weight to the predawn water potential (Mpa) in Helianthus annuus. Dotted lines define predawn water potential thresholds for each treatment.

Curve relating the soil weight/dried soil weight to the predawn water potential (Mpa) in Helianthus annuus. Dotted lines define predawn water potential thresholds for each treatment.