Water input, soil water Storage, and plant physiological status were measured at monthly intervals over a 2½ year period in a mature brigalow (Acacia harpophylla F. Muell.) forest. Water input was studied in terms of rainfall distribution and loss due to canopy interception.
Plant physiological status, as defined by measures of plant water potential, osmotic potential, leaf turgor, leaf resistance, and carbon uptake, was determined daily along with measures of solar radiation, ambient temperature, and humidity to allow the reaction of brigalow to prevailing environmental conditions to be observed.
The pattern of soil water storage was shown to be strongly influenced by salt content. Laboratory studies on the effects of salt and water contents on availability of water to plants allowed definition of the role of salt in the water balance of the community.