Transpiration during the Season of Growth

Abstract

Heterogeneity in the constellation of the climatic factors in the arid areas, and in the available soil moisture both seasonally and annually, leads to conspicuous differences in the intensity of transpiration. Figures 26 and 27 show mean monthly transpiration of 3 planted Aleppo pine forests, one on Mt. Carmel and two in the Judean Hills. The rate of transpiration* gradually decreased beginning in April, and reached its minimum value of 100–200 mg/g/h, during the period from August to November. The high transpiration rate during January–February, 1963, is correlated with unusually high temperatures for these months, and with soil moisture availability.