Zhang X.; Ma L.; Sun M.; Li X.; Song C.; Chen J.; Tu J.(2005)
Sampled from the Gangxi oil field in the Huanghua depression, Bohaiwan Basin, the crude oil He and Ar isotopic compositions and their geochemical significance were investigated. The result shows that i) the 3He/4He values ...
Starks P.J.; Heathman G.C.; Ahuja L.R.; Ma L.(2003)
Estimation of soil water content in the root zone with time in different parts of a watershed is important for both strategic and tactical management of water resources, as well as of agricultural production, water quality, ...