Association of Official Analytical Chemists (AOAC). 1990. 15th ed. Association of Official Analytical Chemists. Washington DC, USA.
ARC. 1980. Agricultural Research Council (ARC). The Nutrient Requirements of Ruminant Livestock, Commonwealth Agricultural Bureaux, Slough, UK (1980).
Bonsi, M. L. K., P. O. Osuji and A. K. Tuak. 1995. Effect of supplementating teff straw with different levels of leucaena or sesbania leaves on the degradbilities of teff straw, sesbania, leucaena, tagasaste and vernonia and on certain rumen and blood metabolites in Ethiopia Menz sheep. Anim. Feed Sci. Technol. 52:101-129.
Burns, R. 1971. Method for estimatation of tannin in grain sorghum. Agronomy Journal 63:511-512.
Chantalakhana, C. 1994. Report on Status and Development of Dairy Production and Milk Products in Thailand: Research and Development in the Future. Thailand Research Fund (TRF), Bangkok Thailand p. 88.
Department of Livestock Development. 2002. Forage legume information. http://www.dld.go.th.html
Department of Livestock Development, 2002. Table 13 Statistics of dairy cattle on January 2002. http://www.dld.go.th/yearly /yearly43/yearly43.html
Horne, P. M. and W. W. Sturr. 1999. Developing forage technologies with smallholder farmers-how to select the best varieties to offer farmers in Southeast Asia. ACIAR Monograph.
Kearl, L. C. 1982. Nutrient Requirements of Ruminants in Developing Countries. Logan: International Feedstuffs Institue. Utah State University, Utah.
Khang, N. D. and H. Wiktorsson. 2000. Effect of cassava leaf meal on ruminant environment of yellow cattle fed urea-treated paddy straw. Asian-Aust. J. Sci. 13:1102-1108.
Leng, R. A. 2003. Tree foliage in ruminant nutrition. FAO Animal Production and Health Paper, 139. p. 100.
Leng, R. A. 1997. Tree foliage in ruminant nutrition. http://www.fao.org/DOCREP/003/W7448E/W7448E01.htm
Mannetje, L.'t. and R. M. Jones. 1992. Plants Resources of Southeast Asia.No.4 Forages. p. 300.
Minson, D. J. 1982. Effects of chemical and physical composition of herbage eaten upon intake. In: (Ed. J. B. Hacker) Nutritional Limits to Animal Production from Pasture, Commonwealth Agricultural Bureau, Farnharm Royal, UK (1982), p. 67-182.
Mpairwe, D. R. 1998. Integration of forage legumes with cereal crops for improved grain yield, forage production and utilisation for small-holder dairy production systems. PhD. thesis, Makerere University, Kampala, Uganda, p. 241.
NRC. 2001. Nutritional Requirement of dairy cattle. 7th rev. ed. Natl. Acad. Sci., Washington, DC.
Nguyen, T. T. H., M. Wanapat, C. Wachirapakorn and P. Pakdee. 2002. Effects of initial cutting and subsequent cutting on yield and chemical compositions of cassava hay and its supplementation on lactating dairy cows. In: Proc. Agriculture Conference, Narasuan University, Pitsanuloke, Thailand, July 26-30.
Norton, B. W. and J. H. Ahn. 1997. A comparison of fresh and dried Calliandra calothyrsus supplements for sheep given a basal diet of barley straw. J. Agric. Sci. Cambridge. 129:485-494.
Office of Agricultural Economics 1997. Target of production of important agricultural products in1996-1997.Bangkok: Ministry of Agriculture and Cooperative.
Office of Livestock Extension 1998. Data of Economical Livestock, Department of Livestock Development, the Ministry of Agriculture and Cooperative, Bangkok, Thailand, p. 150.
SAS. 1998. User's Guide: Statistics, Version 6.12th Edition. SAS Inst. Inc., Cary, NC.
Satjipanon, C., V. Jinosaeng and V. Susaena. 1995. Forage seed production project for Southeast Asia, Annual report 1993-1994. Khon Kaen Animal Nutrition Research Center, Department of Livestock Development, Ministry of Agriculture and Cooperative. p. 124-131.
Silva, A. T. and E. R. Orskov. 1988. The effect of five different supplements on the degradation of straw in sheep given untreated barley straw. Anim. Feed Sci. Technol. 19:289-298.
Steel, R. G. D. and J. H. Torrie. 1980. Principles and Procedures of Statistics: A Biometrical Approach.McGraw-Hill, New York.
Sutton, J. D., I. C. Hart, W. H. Broster, R. J. Elliot and E. Schuller. 1986. Feeding frequency for lactating cows: effect on rumen fermentation and blood metabolites and hormones. Br. J. Nutr. 56:181-192.
Topps, J. H. 1997. Forage legumes as protein supplements to poor quality diets in the semi-arid tropics. In: (Ed. R. J. Wallace and A. Lahloukassi), Rumen Ecology Research Planning. Proceedings of workshop held at ILRI, 13-18 March 1995, Addis Ababa, Ethiopia.
Van Keulen, J. and B. A. Young. 1977. Evaluation of acidinsoluble ash as a natural marker in ruminant digestibility studies. J. Anim. Sci. 44:282.
Van Soest, P. J. and J. B. Robertson. 1991. Methods of dietary fiber, neutral detergent fiber, and nonstarch polysaccharides in relation to animal nutrition. J. Dairy Sci. 74:3583-3597.
Waghorn, G. C. 1990. Effects of condensed tannin on protein digestion and nutritive value of fresh herbage. Proceedings of the Australian Society of Animal Production 18:412-415.
Wanapat, M. 2003. Manipulation of cassava cultivation and utilization to improve protein to energy biomass for livestock feeding in the tropics. Asian-Aust. J. Anim. Sci. 16:463-472.
Wanapat, M. 1990. Nutritional Aspects of Ruminant Production in Southeast Asia with Special Reference to Thailand. Funny Press, Ltd., Bangkok, Thailand.
Wanapat, M. and C. Devendra. 1992. Feeding and nutrition of dairy cattle and buffaloes in Asia.In:Proc. Sustainable Animal Production. 6th AAAP Animal Science Congress VII. (Ed. P. Bunyavejchewin, S. Sangdid and K. Hangsanet) Navakanok.Co., Ltd., Bangkok, Thailand.
Wanapat, M., A. Petlum and O. Pimpa. 2000a. Supplementation of cassava hay to replace concentrate use in lactating Holstein-Friesian crossbreds. Asian-Aust. J. Anim. Sci. 13:600-604.
Wanapat, M., O. Pimpa, A. Petlum and U. Boontao. 1997. Cassava hay: A new strategic feed for ruminants during the dry season. Livestock Research for Rural Development, 9(2): IRRD Home Page.
Wanapat, M., O. Pimpa, W. Siphuak, T. Puramongkon, A. Petlum, U. Boontao, C. Wachirapakorn and K. Sommart. 2000b. Cassava hay: an important on-farm feed for ruminants. In: (Ed. J. D. Brooker), International Workshop on Tannins in Livestock and Human Nutrition, ACIAR Proc. No. 92, p. 71-74.
Wanapat, M., A. Polthanee, S. Wanapat and C. Wachirapakorn. 2002. Feasibility study on cassava leaf/hay as animal feeds. Department of Animal Science, Faculty of Agriculture, Khon Kean University, Khon Kaen 4002, Thailand.
Wanapat, M. and O. Poungchompu. 2001. Method for estimation of tannin by vanillin-HCl method (2001, a methode of Burns, 1971). Department of Animal Science, Khon Kean University, Khon Kaen 4002, Thailand.