Found this on my lunch break today. I scanned trough it (fairly fast), but seems to have a lot of information. Thought I'd share with everyone here.
http://www.fao.org/docrep/003/x6556e/X6556E00.htm#TOC
http://www.fao.org/docrep/003/x6556e/X6556E00.htm#TOC
