Pereira, A. R., Green, S. R., Villa Nova, N. A. 2007. Sap flow, leaf area, net radiation, and the Priestley-Taylor formula for irrigated orchards and isolated trees. Agricultural Water Management. Elsevier,Inc. Volume 92. Pages 48-52

agriculture, Methods, Trees, Interception

http://www.sciencedirect.com/science/article/pii/S0378377407000364

This study assesses  goodness of fit of two methods for estimating the daily sap flow of apple and olive trees in an orchard and a single walnut tree in isolation.