I need a full derivation of Water Potential theory, specifically in tree Xylem, but any general derivation and explanation would be acceptable. I've looked everywhere, the entire library in my university, and hours in google, but I can only find qualitative descriptions. I need the full mathematical derivation of the equations. I know there are relevant courses but I need this for a biomechanics project I'm working on. Anyone know of any good books? Anyone take a course in this and has any useful information? Thanks.