00866nam a2200217Ia 4500 CTU_175343 210402s9999 xx 000 0 und d 631.4 S726 60620105 Southavong, Sisomphone Effect of soil amender (biochar or charcoal) and biodigester effluent on growth and yield of water spinach, rice and on soil fertility : Master of science thesis in agricultural sciences animal husbandry Sisomphone Southavong ; Ngo Van Man, T. R. Preston (Scientific supervisors) Can Tho Can Tho university 2012 A series of experiments was carried out to determine the effect of 4 paper Soil science,Khoa học đất mai,Hải Trung tâm Học liệu Trường Đại học Cần Thơ