Nguyen Hong Hanh, Pham Tien Dung and Preston T R  2011 Effect of chicken manure composted with mixture of native microorganisms or bio-plant product on growth yield of Brassica juncea L.  Workshop on Reducing Greenhouse Gas Emissions from Livestock and Soils (Editors: Reg Preston and Sisomphone Southavong). National Institute of Animal Science, Hanoi, 14-15 November 2011. httm://www.mekarn.org/workshops/GHG-CC/hanh.hua.htm