
%0 Journal Article
%A Bartels, LF 
%T The effects of evaporation, potential transpiration, and rainfall on the depletion of soil moisture by irrigated perennial pasture
%J Australian Journal of Experimental Agriculture
%D 1968/12/01
%V 8
%N 35
%P 720-724
%K 
%R https://doi.org/10.1071/EA9680720
%U https://www.publish.csiro.au/paper/EA9680720 
%X Depletion of soil moisture by an irrigated perennial pasture is shown to be closely related to an evaporative index (E-R), the accumulated difference between evaporation ( E inches) and rainfall (R inches) subsequent to the last irrigation. This index, calculated for three types of evaporimeter, is shown to be directly proportional to (Et-R) the difference between Penman's potential transpiration (Et) and rainfall, for drying cycles of more than seven days duration. It is suggested that (E-K) might be a useful guide for irrigation scheduling, wherever Penman's estimate of potential transpiration is found to be reasonably accurate. 
