Nguyen Huu Yen Nhi, Preston T R , Ogle B and Lundh T 2010 Growth of earthworms (Perionyx excavatus) on cattle or buffalo manure, with or without water hyacinth.  MSc Thesis, MEKARN-SLU http://www.mekarn.org/MSC2008-10/theses/nhi_1.htm

Back to the paper