Chanphone Keoboualapheth and Choke Mikled 2003: Growth Performance of Indigenous Pigs Fed with Stylosanthes guianensis CIAT 184 as Replacement for Rice bran;  Livestock Research for Rural Development (15) 9 Retrieved, from http://www.lrrd.org/lrrd15/9/chan159.htm

Chhay T, Borin K and Preston T R 2010: Effect of Taro (Colocasia esculenta) leaf + stem silage and mulberry leaf silage on digestibility and N retention of growing pigs fed a basal diet of rice bran. Livestock Research for Rural Development. Volume 22, Article #109. http://www.lrrd.org/lrrd22/6/chha22109.htm

Chhay T, Borin K, Sopharith N, Preston T R and Aye T M 2010: Effect of sun-dried and fresh cassava leaves on growth of Tilapia (Oreochromis niloticus) fish fed basal diets of rice bran or rice bran mixed with cassava root meal. Livestock Research for Rural Development. Volume 22, Article #43. http://www.lrrd.org/lrrd22/3/chha22043.htm

Chhay T, Borin K, Sopharith N, Preston T R and Aye T M 2010: Effect of sun-dried and fresh cassava leaves on growth of Tilapia (Oreochromis niloticus) fish fed basal diets of rice bran or rice bran mixed with cassava root meal. Livestock Research for Rural Development. Volume 22, Article #43. http://www.lrrd.org/lrrd22/3/chha22043.htm

Chhay Ty and Preston T R 2005: Effect of water spinach and fresh cassava leaves on intake, digestibility and N retention in growing pigs;   Livestock Research for Rural Development. Vol. 17, Art. #23 Retrieved, from http://www.lrrd.org/lrrd17/2/chha17023.htm

Chhay Ty and Preston T R 2005: Effect of water spinach and fresh cassava leaves on growth performance of pigs fed a basal diet of broken rice. Livestock Research for Rural Development. Volume 17, Article #76. Retrieved , from http://www.lrrd.org/lrrd17/7/chha17076.htm

Chhay Ty and Preston T R 2006  Effect of different ratios of water spinach and fresh cassava leaves on growth of pigs fed basal diets of broken rice or mixture of rice bran and cassava root meal;  Livestock Research for Rural Development. Volume 18, Article # 57. Retrieved, from http://www.lrrd.org/lrrd18/4/chha18057.htm

Chhay Ty,  Preston T R and Ly J  2003:  The use of ensiled cassava leaves in diets for growing pigs. 2. The influence of type of palm oil and cassava leaf maturity on digestibility and N balance for growing pigs.  Livestock Research for Rural Development (15) 8 Retrieved, from http://www.lrrd.org/lrrd15/8/chha158.htm

Chhay Ty, Borin Khieu and Preston T R 2009: Effect of wilting cassava leaves and supplementing them with DL-methionine, on intake, growth and feed conversion in growing pigs. Livestock Research for Rural Development. Volume 21, Article #8. http://www.lrrd.org/lrrd21/1/chha21008.htm

Chhay Ty, Preston T R  and  Ly J 2003: The use of ensiled cassava leaves in diets for growing pigs. 1.The effect of graded levels of palm oil on N digestibility and N balance;  Livestock Research for Rural Development (15) 7 Retrieved, from http://www.lrrd.org/lrrd15/7/chha157.htm

Chhayty,  Preston T R,   Ly J and Keo Sath 2003 The use of ensiled cassava leaves in diets for growing pigs. 3. The effect of graded levels of palm oil on performance traits. Livestock Research for Rural Development (15) 9 Retrieved, from http://www.lrrd.org/lrrd15/9/chha159.htm

Chittavong Malavanh and Preston T R  2006 Intake and digestibility by pigs fed different level of sweet potato leaves and water spinach as supplement to mixture of rice bran and cassava root meal;  Livestock Research for Rural Development. Volume 18, Article # 86. Retrieved, from http://www.lrrd.org/lrrd18/6/mala18086.htm

Chittavong Malavanh, Preston T R and Ogle B 2008: Effect of replacing soybean meal by a mixture of taro leaf silage and water spinach on reproduction and piglet performance in Mong Cai gilts. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/mala2.htm

Chittavong Malavanh, Preston T R and Ogle B 2008: Effect of replacing soybean meal with a mixture of Taro (Colocasia esculenta (L.)Schott) leaf silage and water spinach on apparent digestibility in Mong Cai gilts at two stages of gestation. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/mala3.htm

Chittavong Malavanh, Preston T R and Ogle B 2008: Ensiling leaves of Taro (Colocasia esculenta (L.) Shott) with sugar cane molasses. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/mala1.htm

Chiv Phiny and Lampheuy Kaensombath 2006: Effect on feed intake and growth of depriving rabbits access to soft faeces.  Livestock Research for Rural Development. Volume 18, Article # 34. Retrieved, from http://www.lrrd.org/lrrd18/3/phin18034.htm

Chiv Phiny, Borin K, Preston T R and Ty C 2009: Effect of level of effluent from biodigesters loaded with pig manure on the growth of mulberry (Morus alba) trees. Livestock Research for Rural Development. Volume 21, Article #114. http://www.lrrd.org/lrrd21/7/phin21114.htm

Chiv Phiny, Ogle B, Preston T R and Borin K 2008: Digestibility and N-retention in crossbred pigs of diets with water spinach or water spinach mixed with mulberry leaves as protein sources in basal diets of cassava root meal plus rice bran, or sugar palm syrup plus broken rice. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/phin1.htm

Chiv Phiny, Ogle B, Preston T R and Borin K 2008: Growth performance of pigs fed water spinach or water spinach mixed with mulberry leaves, as protein sources in basal diets of cassava root meal plus rice bran or sugar palm syrup plus broken rice. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/phin2.htm

Chiv Phiny, Preston T R and Ly J 2003 Mulberry (Morus alba) leaves as protein source for young pigs fed rice based diets: Digestibility studies.; Livestock Research for Rural Development (15) 1. Retrieved, from http://www.lrrd.org/lrrd15/1/phin151.htm

Do Thi Thanh Van, Nguyen Thi Mui, Inger Ledin. 2004. Effect of method of presentation of different foliages given separately or in mixtures on intake and behaviour of goats. Animal Feed Science and Technology (In Press).

Do Thi Thanh Van,  Ledin  I and Nguyen Thi Mui 2002  Feed intake and behavior of small ruminants fed whole sugar cane as a sole roughage with or without concentrate. Animal Feed Science and Technology 100:1-2,79-91.

Do Viet Minh, Jan Erik Lindberg and Brian Ogle 2004  Effect of Scavenging and Protein Supplement on the Feed Intake and Performance of Improved Pullets and Laying hens in Northern Vietnam. Asian-Australasian Journal of Animal Sciences, 17 (11), 1553-1561.

Do Viet Minh, Le Viet Ly and B. Ogle. 2004. Effects of energy and protein supplementation on the production and economic efficiency of scavenging improved (TamHoang) and local (Ri) breed hens under smallholder conditions in North Vietnam. Tropical Animal Health and Production, 36 (2004), 703-714.

Dong N T K and Ogle R B 2003 Effect of brewery waste replacement of concentrate on the performance of local and crossbred growing Muscovy ducks. Asian-Australasian Journal of Animal Sciences. 16 (10): 1510-1517.

Dong N T K and Ogle R B 2004. An evaluation of brewery waste as a replacement for concentrates in diets for growing crossbred common ducks. Tropical Animal Health and Production. 36 (7): 715-729.

Dong N T K,  Elwinger K, Lindberg J E  and Ogle R B 2005. Effects of replacing soybean meal with soya waste and fish meal with ensiled shrimp waste on the performance of growing crossbred ducks. Asian-Australasian Journal of Animal Sciences. 18 (6) 825-834

Du Thanh Hang , Linh Nguyen Quang, Preston T R , Everts H and Beynen A C 2009: Effect of supplementary DL-methionine in pig diets with cassava leaves as a major protein source. Livestock Research for Rural Development. Volume 21, Article #15. http://www.lrrd.org/lrrd21/1/hang21015.htm

Du Thanh Hang and Preston T R 2005 The effects of simple processing methods of cassava leaves on HCN content and intake by growing pigs.  Livestock Research for Rural Development. Volume 17, Article # 109. Retrieved, from http://www.lrrd.org/lrrd17/09/hang17099.htm

Du Thanh Hang, Linh Nguyen Quang, Everts H and Beynen A C 2009: Ileal and total tract digestibility in growing pigs fed cassava root meal and rice bran with inclusion of cassava leaves, sweed potato vine, duckweed and stylosanthes foliage. Livestock Research for Rural Development. Volume 21, Article #12. http://www.lrrd.org/lrrd21/1/hang21012.htm

Dung N T, Binh D V, Mui N T and Preston T R 2010: Effect of cassava hay supplementation on milk production in lactating goats. Livestock Research for Rural Development. Volume 22, Article #45. http://www.lrrd.org/lrrd22/3/dung22045.htm

Duong Nguyen Khang and Wiktorsson H 2004 Effects of fresh cassava tops on rumen environment parameters, thyroid gland hormones and liver enzymes of local yellow cattle fed urea-treated fresh rice straw. Tropical Animal Health and Production, Volume 36, No. 8, pp. 751-762

Duong Nguyen Khang and Wiktorsson  H 2000  Effects of cassava leaf meal on the rumen environment of local yellow cattle fed urea-treated paddy straw. Asian-Aus. J. Anim. Sci. 13: 1102-1108

Duong Nguyen Khang and Wiktorsson  H 2004  Effects of ensiled cassava tops on rumen environment parameters, thyropid gland hormones and liver enzymes of cows fed urea-treated fresh rice straw. Asian-Aus. J. Anim. Sci. 17: 936-941

Duyet H N 2010: Giant taro leaves (Alocasia macrorrhiza) for replacement of soybean meal in diets for Mong Cai sows in Central Vietnam. Livestock Research for Rural Development. Volume 22, Article #149. http://www.lrrd.org/lrrd22/8/duye22149.htm

Duyet H N, Thuan T T and Son N D 2010: Effects on sow reproduction and piglet performance of replacing soybean meal by a mixture of sweet potato leaves, water spinach and fresh cassava foliage in the diets of Mong Cai and Yorkshire sows. Livestock Research for Rural Development. Volume 22, Article #59. http://www.lrrd.org/lrrd22/3/duye22059.htm

Hang D T and Preston T R 2010: Effect of processing Taro leaves on oxalate concentrations and using the ensiled leaves as a protein source in pig diets in central Vietnam. Livestock Research for Rural Development. Volume 22, Article #68. http://www.lrrd.org/lrrd22/4/hang22068.htm

Ho Bunyeth and Preston T R 2004: Biodigester effluent as fertilizer for water spinach established from seed or from cuttings;  Livestock Research for Rural Development. Vol. 16, Art. #79. Retrieved, from http://www.lrrd.org/lrrd16/10/buny16079.htm

Ho Bunyeth and Preston T R 2006 Growth performance and parasite infestation of goats given cassava leaf silage, or sun-dried cassava leaves, as supplement to grazing in lowland and upland regions of Cambodia. Livestock Research for Rural Development. Volume 18, Article # 28. Retrieved, from http://www.lrrd.org/lrrd18/02/buny18028.htm

Ho Thanh Tham, Man N V and Preston T R 2008: Estimates of protein fractions of various heat-treated feeds in ruminant production. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/tham2.htm

Ho Thanh Tham, Man N V and Preston T R 2008: Performance of young cattle fed rice straw sprayed with mixture of urea and molasses supplemented with different levels of cassava leaf meal. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/tham1.htm

Hoang Huong Giang, Le Viet Ly and Ogle B 2004:  Evaluation of ensiling methods to preserve sweet potato roots and vines as pig feed. Livestock Research for Rural Development. Vol. 16, Art. #45. Retrieved, from http://www.lrrd.org/lrrd16/7/gian16045htm

Hoang Huong Giang, Le Viet Ly and  Ogle B 2004: Digestibility of dried and ensiled sweet potato roots and vines and their effect on the performance and economic efficiency of F1 crossbred fattening pigs. Livestock Research for Rural Development. Vol. 16, Art. #50. Retrieved, from http://www.lrrd.org/lrrd16/7/gian16050.htm

Hongthong Phimmmasan,  Siton Kongvongxay, Chhay Ty and Preston T R 2004: Water spinach (Ipomoea aquatica) and Stylo 184 (Stylosanthes guianensis CIAT 184) as basal diets for growing rabbits.  Livestock Research for Rural Development. Vol. 16, Art. #34. Retrieved, from http://www.lrrd.org/lrrd16/5/hong16034.htm

Kaensombath Lampheuy, San Thy and Preston T R  2004: Manure or biodigester effluent as fertilizer for duckweed.  Livestock Research for Rural Development,  Vol. 16, Art. #17,  Retrieved, from http://www.lrrd.org/lrrd16/3/lamp1603.htm

Kanpukdee Suchitra and Wanapat M 2008: Effects of mangosteen (Garcinia mangostana) peel and sunflower and coconut oil supplementation on rumen fermentation, milk yield and milk composition in lactating dairy cows. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/such2.htm

Kanpukdee Suchitra and Wanapat M 2008: Study on ruminal degradability of local plants by using nylon bag technique. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/such1.htm

Keo Sath, Borin K and Preston T R 2008: Effect of levels of sun-dried cassava foliage on growth performance of cattle fed rice straw. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/sath2.htm

Keo Sath, Borin K and Preston T R 2008: Survey on feed utilization for cattle production in Takeo province. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/sath1.htm

Khieu Borin and Frankow-Lindberg B E 2004. Effects of legumes-cassava intercropping for foliage and biomass production. Journal of Sustainable Agriculture (In Press)

Khieu Borin, Lindberg, J.E. and Ogle, R.B. 2005. Effect of variety and preservation method of cassava leaves on diet digestibility by indigenous and improved pigs. Animal Science 2005, 80: 319-324.

Khuc Thi Hue, Do Thi Thanh Van and  Inger Ledin 2008 Effect of supplementing urea treated rice straw and molasses with different forage species on the performance of lambs. Small Ruminant Research 78 (2008) 134–143

KhucThi Hue and Preston T R 2006: Effect of different sources of supplementary fibre on growth of rabbits fed a basal diet of fresh water spinach.  Livestock Research for Rural Development. Volume 18, Article # 36. Retrieved, from http://www.lrrd.org/lrrd18/03/hue18036.htm

Khuc Thi Hue,  Do Thi Thanh Van,  Inger Ledin, Eva Spörndly and Ewa Wredle  2010  Effect of feeding fresh, wilted and sun-dried foliage from cassava (Manihot esculenta Crantz) on the performance of lambs and their intake of hydrogen cyanide. Livestock Science 131 (2010) 155–161

Kiyothong K and Wanapat  M 2004  Supplementation of Cassava Hay and Stylo 184 Hay to Replace Concentrate for Lactating Dairy Cows. Asian-Australasian Journal of Animal Science 17: 670-677

Kiyothong K and Wanapat M 2003:  Cassava hay and Stylo 184 hay to replace concentrates in diets for lactating dairy cows;  Livestock Research for Rural Development (15) 11 Retrieved, from http://www.lrrd.org/lrrd15/11/krai1511.htm

Kiyothong   K and Wanapat M 2004. Growth, Hay Yield and Chemical Composition of Cassava and Stylo 184 Grown under Intercropping. Asian-Australasian journal of Animal Science. 17: 799 -807  

Kongmanila Daovy and Ledin I 2009 Chemical composition of some tropical foliage species and their intake and digestibility by goats. Asian-Australasian Journal of Animal Science. 22 (6) 803-811

Kongmanila Daovy, Preston T R and Ledin I 2008: Selective behaviour of goats offered different tropical foliages. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/daov2.htm

Kongmanila Daovy, Preston T R and Ledin I 2008: Survey on the utilization of local foliage species for goats in Xaythanee district, Vientiane City. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/daov1.htm

Le Ding Phung 2009: Genotype by environment interaction: a case study of productive and reproductive performance of Yellow local and F1 (Red Sindhi x Yellow local) cattle in two production zones in Quang Ngai Vietnam. Livestock Research for Rural Development. Volume 21, Article #17. http://www.lrrd.org/lrrd21/2/phun21017.htm

Le Van An and Lindberg J E 2004  Ensiling of Sweet Potato Leaves (Ipomoea batatas (L.) Lam) and the Nutritive Value of Sweet Potato Leaf Silage for Growing Pigs. Asian-Aust. J. Anim. Sci. 2004, Vol 17, No. 4: 497-503

Le Van An, Hong T T  and Lindberg, J. E. 2004. Ileal and Total Tract Digestibility in growing pigs fed cassava root meal diets with inclusion of fresh, dry and ensiled sweet potato leaves. Animal Feed Science and Technology, 114, 127-139.

Le Van An, Hong, T.T.T., Ogle, B. and Lindberg, J.E. 2005. Utilisation of ensiled sweet potato leaves as a protein supplement in diets for growing pigs. Tropical Animal Health and Production. Volume 37, Number 1

Le Van An, Lindberg B E F and Lindberg J E  2003  Effect of harvesting interval and defoliation on yield and chemical composition of leaves, stems and tubers of sweet potato (Ipomoea batatas L. (Lam.)) plant parts. Field Crops Research. 82: 49-58.

Luu Huu Manh, Nguyen Nhut Xuan Dung and Tran Phung Ngoi 2005: Introduction and evaluation of Moringa oleifera for biomass production and as feed for goats in the Mekong Delta. Livestock Research for Rural Development. Volume 17, Article # 104. Retrieved, from http://www.lrrd.org/lrrd17/09/manh17104.htm

Ly Thi Luyen and Preston T R  2004: Effect of level of urea fertilizer on biomass production of water spinach (Ipomoea aquatica) grown in soil and in water.  Livestock Research for Rural Development. Vol. 16, Art. #81. Retrieved, from http://www.lrrd.org/lrrd16/10/luye16081.htm

Mai Van Sanh 2009: Effects of supplementation with cassava leaf meal before and after calving on birth weight, growth rate of calves and body weight change of buffalo cows in smallholder farms. Livestock Research for Rural Development. Volume 21, Article #98. http://www.lrrd.org/lrrd21/7/sanh21098.htm

Manh L H, Xuan Dung N N, Kinh L V, Binh T C, Thu Hang B P and Phuoc T V 2009: Composition and nutritive value of rice distillers’ by-product (hem) for small-holder pig production. Livestock Researchfor Rural Development. Volume 21, Article #224. http://www.lrrd.org/lrrd21/12/manh21224.htm

Men L T, Ogle B, Son V V and Preston T R 2010: Evaluation of water spinach (Ipomoea aquatica) as a protein source for Ba Xuyen and Large White sows. Livestock Research for Rural Development. Volume 22, Article #70. http://www.lrrd.org/lrrd22/4/leme22070.htm

Mesfin, R. and Ledin, I. 2004, Assessment of the treatment and use of urea treated straw for cattle feeding in Selale, Central Ethiopia. Ethiopian Journal of Animal Science 4:1, 23-32. (financed by SAREC International MSc Programme)

Minh, D.V. & Ogle, B. 2005. Effects of Scavenging and Supplementation of Lysine and Methionine on the Feed Intake, Performance and Carcase Quality of Improved Dual-Purpose Growing Chickens. Tropical Animal Health and Production. 37 (2005) 1- 15.

Minh, D.V., Lindberg, J.E. & Ogle, B. 2004. Effects of Scavenging and Protein Supplement on the Feed Intake and Performance of Improved Pullets and Laying Hens in Northern Vietnam. Asian-Australasian Journal of Animal Sciences. 17 (11), 1553-1561.

Minh, D.V., Ly, L. V. & Ogle, B. 2004. Effects of Energy and Protein Supplementation on the Production and Economic Efficiency of Scavenging Improved (Tamhoang) and Local (Ri) Breed Hens under Smallholder Conditions in Northern Vietnam. Tropical Animal Health and Production. 36 (7) 703- 714.

Nakkitset S, Mikled C and Ledin I 2008: Evaluation of head lettuce residue and Mimosa pigra as foliages for rabbits compared to Ruzi grass: Effect on growth performance and production costs on-farm. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/nakk1.htm

Ngamsaeng A,  Wanapat M and Khampa S 2006 Effects of Mangosteen Peel (Garcinia mangostana) Supplementation on Rumen Ecology, Microbial Protein Synthesis, Digestibility and Voluntary Feed Intake in Cattle. Pakistan Journal of Nutrition 5 (5): 445-452.

Ngamsaeng Amornsak, San Thy and Preston T R 2004: Duckweed (Lemna minor) and water spinach (Ipomoea aquatica) as protein supplements for ducks fed broken rice as the basal diet.  Livestock Research for Rural Development,  Vol. 16, Art. #16,  Retrieved, from http://www.lrrd.org/lrrd16/3/amor1603.htm

Ngamsaeng, A, Wanapat  M and Khampa S  2006. Evaluation of Local Tropical Plants by In vitro Rumen Fermentation and Their Effects on Fermentation End-Products. Pakistan Journal of Nutrition 5 (5): 414-418.

Ngo Tien Dung, Ledin Inger and Nguyen Thi Mui 2005: Intercropping cassava (Manihot esculenta Crantz) with Flemingia (Flemingia macrophylla); effect on biomass yield and soil fertility.  Livestock Research for Rural Development. Vol. 17, Art. #6 Retrieved, from http://www.lrrd.org/lrrd17/1/dzun17006.htm

Ngo Tien Dung, Nguyen Thi Mui and Inger Ledin. 2004. Effect of replacing a commercial concentrate with cassava hay (Manihot esculenta Crantz) on the performance of growing goats. Animal Feed Science and Technology (In Press).

 Ngo Tien Dzung and Preston T R 2007: Effect of increasing area of cassava (Manihot esculenta Crantz) relative to Flemingia (Flemingia macrophylla) on biomass yield, soil fertility and soil erosion. Livestock Research for Rural Development. Volume 19, Article #22. Retrieved , from http://www.lrrd.org/lrrd19/2/dzun19022.htm

Ngoc Huyen L T, Do H Q, Preston T R and Leng R A 2010: Nitrate as fermentable nitrogen supplement to reduce rumen methane production. Livestock Research for Rural Development. Volume 22, Article #146. http://www.lrrd.org/lrrd22/8/huye22146.htm

Nguyen Duy Quynh Tram and Preston T R 2004: Effect of method of processing cassava leaves on intake, digestibility and N retention by Ba Xuyen piglets.  Livestock Research for Rural Development. Vol. 16, Art. # 80. Retrieved, from http://www.lrrd.org/lrrd16/10/tram16080.htm

Nguyen Nhut Xuan Dung, Luu Huu Manh and Brian Ogle 2005: Effects of fermented liquid feeds on the performance, digestibility, nitrogen retention and plasma urea nitrogen (PUN) of growing-finishing pigs.  Livestock Research for Rural Development. Volume 17, Article # 102. Retrieved, from http://www.lrrd.org/lrrd17/9/xdun17102.htm

Nguyen Thi Hong Nhan, Hon N V and Preston T R 2009: Ensiling with or without additives to preserve pineapple residue and reduce pollution of the environment. Livestock Research for Rural Development. Volume 21, Article #96. http://www.lrrd.org/lrrd21/7/nhan21096.htm

Nguyen Thi Hong Nhan, Man N V and Preston T R 2009: Biomass yield of Hymenachne acutigluna and Paspalum atratum in association with Sesbania sesban on seasonally waterlogged soils and their use as feeds for cattle in the Mekong delta, Vietnam. Livestock Research for Rural Development. Volume 21, Article #121. http://www.lrrd.org/lrrd21/8/nhan21121.htm

Nguyen Thi Hong Nhan, Nguyen Trong Ngu, Nguyen Thiet, Preston T R and Leng R A 2007: Determination of the optimum level of a soybean oil drench with respect to the rumen ecosystem, feed intake and digestibility in cattle. Livestock Research for Rural Development. Volume 19, Article #117. http://www.lrrd.org/lrrd19/8/nhan19117.htm

Nguyen Thi Hong Nhan, Nguyen Trong Ngu, Vo Van Son, Preston T R and Leng R A 2007: Effects of oil drench on growth rate of cattle fattened on grass, supplemented with molasses, rice bran or rice straw. Livestock Research for Rural Development. Volume 19, Article #133. http://www.lrrd.org/lrrd19/9/nhan19133.htm

Nguyen Thi Hong Nhan, Nguyen Van Hon, Nguyen Trong Ngu, Nguyen Thi Thu Hong, Preston T R and Leng R A 2003: Effect of drenching with cooking oil on performance of local “Yellow” cattle fed rice straw and cassava foliage. Livestock Research for Rural Development 15 (7). http://www.lrrd.org/lrrd15/7/nhan157.htm

Nguyen Thi Hong Nhan, Trong Ngu N, Preston T R and Leng R A 2008: Effects of drenching soybean oil and fish oil on intake, digestibility and performance of cattle fattening in the Mekong Delta, Vietnam. Livestock Research for Rural Development. Volume 20, Article #113. http://www.lrrd.org/lrrd20/7/nhan20113.htm

Nguyen Thi Kim Dong and Ogle  B 2003  Effect of brewery waste replacement of concentrate on the performance of local and crossbred Muscovy ducks. Asian- Australasian Journal of Animal Sciences Vol 16, No 10: 1510-1517

Nguyen Thi Kim Dong and R. Brian Ogle. 2004. An evaluation of brewery waste as a replacement for concentrates in diets for growing crossbred common ducks. Tropical Animal Health and Production, 36 (2004), 715-729.

Nguyen Thi Kim Dong, Nguyen Van Thu, Ogle B and Preston T R 2008: Effect of supplementation level of water spinach (Ipomoea aquatica) leaves in diets based on para grass (Brachiaria mutica) on intake, nutrient utilization, growth rate and economic returns of crossbred rabbits in the Mekong Delta of Vietnam. Livestock Research for Rural Development. Volume 20, Article #144. http://www.lrrd.org/lrrd20/9/kdon20144.htm

Nguyen Thi Kim Khang and Ogle B  2004^:  Effects of replacing roasted soya beans by broken rice and duckweed on performance of  growing Tau Vang chickens confined on-station and scavenging on-farm.  Livestock Research for Rural Development. Vol. 16, Art. #56. Retrieved, from http://www.lrrd.org/lrrd16/8/khan16056.htm

Nguyen Thi Kim Khang and Ogle B 2004 Effects of dietary protein level and a duckweed supplement on the growth rate of local breed chicks.  Livestock Research for Rural Development. Vol. 16, Art. #54 Retrieved, from http://www.lrrd.org/lrrd16/8/khan16054.htm

Nguyen Thi Kim Khang and Ogle B 2004 Effects of duckweed on the performance of local (Tau Vang) laying hens.  Livestock Research for Rural Development. Vol. 16, Art. #57 Retrieved, from http://www.lrrd.org/lrrd16/8/khan16057.htm

Nguyen Thi Thuy and Ogle B 2004: The effect of supplementing different green feeds (water spinach, sweet potato leaves and duckweed) to broken rice based diets on performance, meat and egg yolk colour of  Luong Phuong chickens. Retrieved, from MEKARN Research Reports. http://www.mekarn.org/Research/thuyctu.htm

Nguyen Thi Thuy and Ogle B 2007: Effect of supplementation on the growth and laying performance of confined and scavenging local chickens. Livestock Research for Rural Development. Volume 19, Article #30.  http://www.lrrd.org/lrrd19/2/thuy19030.htm

Nguyen Trong Ngu and Inger Ledin. 2005. Effects of Feeding Wastes from  Brassica species on Growth of Goats and Pesticide/Insecticide Residues in Goat  Meat. Asian-Australasian Journal of Animal Sciences.   Volume 18 No. 2 : 197  

Nguyen Van Hiep and Preston T R 2006 Effect of cattle manure and biodigester effluent levels on growth and composition of water spinach.   Livestock Research for Rural Development. Volume 18. Article # 50. Retrieved, from http://www.lrrd.org/lrrd18/4/hiep18050.htm

Nguyen Van Hiep, Wiktorsson H and Man N V 2008: The effect of cutting interval on foliage yield and chemical composition of Tropical Kudzu (Pueraria phaseoloides) cultivated as cover-crop in rubber plantation. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/hiep1.htm

Nguyen Van Hiep, Wiktorsson H and Man N V 2008: The effect of molasses on the quality of Kudzu silage and evaluation of feed intake and digestibility of diets supplemented with Kudzu silage or Kudzu hay by heifers. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/hiep2.htm

Nguyen Xuan Ba, Vu Duy Giang and Le Duc Ngoan 2005: Ensiling of mulberry foliage (Morus alba) and the nutritive value of mulberry foliage silage for goats in central Vietnam.  Livestock Research for Rural Development. Vol. 17, Art. # 15. Retrieved, from http://www.lrrd.org/lrrd17/2/ba17015.htm

Nguyn Thi Kim Dong, Nguyen Van Thu and Preston T R 2008: Effect of dietary protein supply on the reproductive performance of crossbred rabbits. Livestock Research for Rural Development. Volume 20, Article #138. http://www.lrrd.org/lrrd20/9/kdon20138.htm

Ninh Thi Len, Jan Erik Lindberg and Brian Ogle (2007). Digestibility and nitrogen retention of diets containing different levels of fibre in local (Mong Cai), F1 (Mong Cai x Yorkshire) and exotic (Landrace x Yorkshire) growing pigs in Vietnam. Journal of Animal Physiology and Animal Nutrition (In press).

Ninh Thi Len, Jan Erik Lindberg and Brian Ogle (2007). Effect of Dietary Fiber Level on the Performance and Carcass Traits of Mong Cai, F1 Crossbred (Mong Cai x Yorkshire) and Landrace x Yorkshire Pigs. Asian-Australasian Journal of Animal Sciences (In press)

Nnguyen Thi Thu Hong, Quac V A, Kim Chung T T, Hiet B V, Mong N T and Huu P T 2008: Mimosa pigra for growing goats in the Mekong Delta of Vietnam. Livestock Research for Rural Development. Volume 20, Article #208. http://www.lrrd.org/lrrd20/12/hong20208.htm

Pathoummalangsy K and Preston T R 2008: Effects of supplementation with rumen fermentable carbohydrate and sources of 'bypass' protein on feed intake, digestibility and N retention in growing goats fed a basal diet of foliage of Tithonia diversifolia. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/kham20076.htm

Pathoummalangsy Khamparn and Preston T R  2006: Effect of a supplement of fresh water spinach (Ipomoea aquatica) on feed intake and digestibility in goats fed a basal diet of cassava foliage.  Livestock Research for Rural Development. Volume 18, Article # 35. Retrieved , from http://www.lrrd.org/lrrd18/03/kham18035.htm

Pham Tan Nha, Nguyen Van Thu and Preston T R 2008: A field investigation of performance and economic efficiency of working buffaloes in the Mekong Delta. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/nha1.htm

Pham Tan Nha, Nguyen Van Thu and Preston T R 2008: Effects of different levels and sources of crude protein supplementation on feed intake, digestibility and nitrogen retention in swamp buffaloes compared to local cattle. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/nha2.htm

Phanthavong Vongsamphanh and Wanapat M 2004:  Comparison of cassava hay yield and chemical composition of local and introduced varieties and effects of levels of cassava hay supplementation in native beef cattle fed on rice straw.  Livestock Research for Rural Development. Vol. 16, Art. #55. Retrieved, from http://www.lrrd.org/lrrd16/8/vong16055.htm

Pheng Buntha and Chhay Ty 2006: Water-extractable dry matter and neutral detergent fibre as indicators of whole tract digestibility in goats fed diets of different nutritive value. Livestock Research for Rural Development. Volume 18, Article # 33. Retrieved, from http://www.lrrd.org/lrrd18/3/bunt18033.htm

Pheng Buntha, Borin K, Preston T R and Ogle B 2008: Digestibility and nitrogen balance studies in pigs fed diets with ensiled taro (Colocasia esculenta) leaves as replacement for fish meal. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/bunt2.htm

Pheng Buntha, Borin K, Preston T R and Ogle B 2008: Effect of Taro (Colocasia esculenta) leaf silage as replacement for fish meal on feed intake and growth performance of crossbred pigs. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/bunt3.htm

Pheng Buntha, Borin K, Preston T R and Ogle B 2008: Survey of taro varieties and their use in selected areas of Cambodia. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/bunt1.htm

Phengvilaysouk A and Lampheuy Kaensombath 2006: Effect on intake and digestibility by goats given jackfruit (Artocarpus heterophyllus) leaves alone, the whole branch or free access to both.  Livestock Research for Rural Development. Volume 18, Article # 38. Retrieved, from http://www.lrrd.org/lrrd18/03/amma18038.htm

Phengvilaysouk A and Wanapat M 2008: Effect of coconut oil and cassava hay supplementation on rumen ecology, digestibility and feed intake in swamp buffaloes. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/amma2.htm

Phengvilaysouk A and Wanapat M 2008: Study on the effect of harvesting frequency on cassava foliage for cassava hay production and its nutritive value. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/amma1.htm

Phiny C, Preston T R and Borin K 2010: Effect of fresh mulberry leaves and sweet potato vines on growth performance of pigs fed a basal diet of broken rice. Livestock Research for Rural Development. Volume 22, Article #44. http://www.lrrd.org/lrrd22/3/phiny22044.htm

Phonepaseuth Phengsavanh and Ledin Inger 2003: Effect of Stylo 184 (Stylosanthes guianensis CIAT 184) and Gamba grass (Andropogon gayanus cv. Kent) in diets for growing goats;  Livestock Research for Rural Development (15) 10 Retrieved, from http://www.lrrd.org/lrrd15/10/seut1510.htm

Phounvisouk Latsamy and Preston T R 2008: Effect of fertilization with biodigester effluent on substrates of fruit waste or fermented fish waste, each mixed with pig manure, for growth of larvae from house flies. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/lats1.htm

Phounvisouk Latsamy and Preston T R 2008: Fly larvae, earthworms and duckweed as feeds for frogs in an integrated farming system. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/lats2.htm

Pok Samkol, Buntha and Ly J 2003: Nitrogen balance in young Mong Cai and Large White pigs. Diets high in fibre from rubber seed meal. Proceedings of the VII Regional Meeting on Nutrition and Production of Monogastric Animals (R. Santos, J.C. Segura and L. Sarmiento, editors). Autonomous University of Yucatán, Mérida City, Mexico, p 70-71 (In Spanish).

Pok Samkol, Pech Sovanno, Preston T R and Ly J 2002: Digestibility studies in growing pigs fed diets based on full-fat rubber seeds or soya beans supplemented with water spinach. Livestock Research for Rural Development (14) 6 . http://www.lrrd.org/lrrd14/6/ly146b.htm

Pok Samkol, Preston T R and Leng R A 2006 Effect of offering leaves or stems of water spinach on patterns of eating, consumption of soft faeces and excretion of hard faeces by growing rabbits. Livestock Research for Rural Development. Volume 18, Article # 46. Retrieved, from http://www.lrrd.org/lrrd18/3/samk18046.htm

Pok Samkol, Preston T R and Ly J 2006 Digestibility indices and N balance in growing rabbits fed a basal diet of water spinach (Ipomoea aquatica) supplemented with broken rice. Livestock Research for Rural Development. Volume 18, Article # 19. Retrieved, from http://www.lrrd.org/lrrd18/2/samk18019.htm

Pok Samkol, Preston T R and Ly J 2006 Effect of increasing offer level of water spinach (Ipomoea aquatica) on intake, growth and digestibility coefficients of rabbits.  Livestock Research for Rural Development. Volume 18, Article # 22. Retrieved, from http://www.lrrd.org/lrrd18/2/samk18022.htm

Prak Kea, Preston T R and Ly J 2003 Feed intake, digestibility and N retention of a diet of water spinach supplemented with palm oil and / or broken rice and dried fish for growing pigs.  Livestock Research for Rural Development (15) 8 Retrieved, from http://www.lrrd.org/lrrd15/8/kea158.htm

Promkot C and Wanapat M 2003:  Ruminal degradation and intestinal digestion of crude protein of tropical protein resources using nylon bag technique and three-step in vitro procedure in dairy cattle;  Livestock Research for Rural Development (15) 11 Retrieved, from http://www.lrrd.org/lrrd15/11/prom1511.htm

Promkot  C and Wanapat  M 2004: Effect of level of cottonseed meal and protein in diets containing cassava chips and  rice straw  for  lactating dairy cows. Australasian Asian Journal of Animal Science. 18: 502-511 

San Thy and Preston T R 2003: Effluent from biodigesters with different retention times for primary production and feed of Tilapia (Oreochromis niloticus).   Livestock Research for Rural Development (15) 9 Retrieved, from http://www.lrrd.org/lrrd15/9/sant159.htm

San Thy, Buntha P, Vanvuth  T, Preston T R, Duong Nguyen Khang, Soukanh K, Boualong Phouthone, Choke Mikled and Sopharoek N 2005: Effect of length: diameter ratio in polyethylene biodigesters on gas production and effluent composition.  Livestock Research for Rural Development. Volume 17, Article # 120. Retrieved, from http://www.lrrd.org/lrrd17/11/sant17120.htm

San Thy, Khieu Borin, Try Vanvuth, Pheng Buntha and Preston T R 2008: Effect of water spinach and duckweed on fish growth performance in poly-culture ponds. Livestock Research for Rural Development. Volume 20, Article #16. http://www.lrrd.org/lrrd20/1/sant20016.htm

San Thy, Preston T R and Ly J 2003: Effect of retention time on gas production and fertilizer value  of biodigester effluent;   Livestock Research for Rural Development (15) 7 Retrieved, from http://www.lrrd.org/lrrd15/7/sant157.htm

Sao N V, Mui N T and Binh Đ V 2010: Biomass production of Tithonia diversifolia (Wild Sunflower), soil improvement on sloping land and use as high protein foliage for feeding goats. Livestock Research for Rural Development. Volume 22, Article #151. http://www.lrrd.org/lrrd22/8/sao22151.htm

Seng Sokerya and Preston T R 2003 Effect of grass or cassava foliage on growth and nematode parasite infestation in goats fed low or high protein diets in confinement.  Livestock Research for Rural Development (15) 8 Retrieved, from http://www.lrrd.org/lrrd15/8/kery158.htm

Sokerya S, Phanchadcharam C, Suy M and Höglund J 2010: Effects of ensiled cassava (Manihot esculenta) foliage compared to a soybean meal supplement on gastrointestinal nematode infections in goats. Livestock Research for Rural Development. Volume 22, Article #115. http://www.lrrd.org/lrrd22/6/soke22115.htm

Souksamlane K, Ammaly P and Wanapat M 2010: Effect of cassava hay supplementation to untreated rice straw and a mineral-urea block on growth rate of swamp buffaloes under small-holder conditions. Livestock Research for Rural Development. Volume 22, Article #63. http://www.lrrd.org/lrrd22/4/amma22063.htm

Suphawat Joomjantha and Wanapat M 2008: Effect of intercropping on biomass yield and chemical composition of cassava. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/joom1.htm

Suphawat Joomjantha and Wanapat M 2008: Effect of supplementation with tropical protein-rich feed resources on rumen ecology, microbial protein synthesis and digestibility in swamp buffaloes. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/joom2.htm

Theng Kouch, Preston T R and Hun Hieak 2006 Effect of supplementation with Kapok (Ceiba pentandra) tree foliage and Ivermectin injection on growth rate and parasite eggs in faeces of grazing goats in farmer households. Livestock Research for Rural Development. Volume 18, Article # 87. Retrieved, from http://www.lrrd.org/lrrd18/06/kouc18087.htm

Theng Kouch, T R Preston and J Ly 2003: Studies on utilization of trees and shrubs as the sole feedstuff by growing goats; foliage preferences and nutrient utilization;   Livestock Research for Rural Development (15) 7 Retrieved, from http://www.lrrd.org/lrrd15/7/kouc157.htm

Thim Sokha, Preston T R and Borin K 2008: Effect of different protein levels derived from mixtures of water spinach and fresh sweet potato vines in basal diets of broken rice or cassava root meal and rice bran for growing pigs. Livestock Research for Rural Development. Volume 20, supplement. http://www.lrrd.org/lrrd20/supplement/sokh.htm

Thu Hang B P, Lam V, Trang T T, Preston T R and Ledin I 2010: Effect of replacing Melastoma (Melastoma affine, D. Don) foliage with Sesbania grandiflora on intake, digestibility and N retention of growing goats. Livestock Research for Rural Development. Volume 22, Article #39. http://www.lrrd.org/lrrd22/2/thuh22039.htm

Toan N H and Preston T R 2010: Taro as a local feed resource for pigs in small scale household condition. Livestock Research for Rural Development. Volume 22, Article #152. http://www.lrrd.org/lrrd22/8/toan22152.htm

Toum Keopaseuht, Chhay Ty, Bounthong Bouahom and Preston T R 2004: Effect of method of offering foliages of Gliricida sepium and Stylosanthes guianensis CIAT 184 to goats on intake and digestibility; Livestock Research for Rural Development. Vol. 16, Art. #31. Retrieved, from http://www.lrrd.org/lrrd16/05/toum16031.htm

Tran Hoang Chat, Ngo Tien Dung, Dinh Van Binh and Preston T R 2005:   Water spinach (Ipomoea aquatica) as replacement for guinea grass for growing and lactating rabbits Livestock Research for Rural Development. Volume 17, Article # 109. Retrieved, from http://www.lrrd.org/lrrd17/10/chat17109.htm

Tran Hoang Chat, Ngo Tien Dung, Dinh Van Binh and Preston T R  2005: Effect on yield and composition of water spinach (Ipomoea aquatica), and on soil fertility,  of fertilization with worm compost or urea.  Livestock Research for Rural Development. Volume 17, Article # 108. Retrieved, from http://www.lrrd.org/lrrd17/10/chat17108.htm

Tran Thi Bich Ngoc and Preston T R 2006  Soil bio-test to evaluate comparative fertility of soils and effects of adding earthworm compost. Livestock Research for Rural Development. Volume 18, Article # 49. Retrieved, from http://www.lrrd.org/lrrd18/03/ngoc18049.htm

Tran Thi Thu Hong, Nguyen Quang Linh, Ogle B and Lindberg J K 2006: Survey on the prevalence of diarrhoea in pre-weaning piglets, and on feeding systems as contributing risk factors in smallholdings in Central Vietnam. Accepted by Tropical Animal Health and Production.

Trinh Phuc Hao, Ho Quang Do, Preston T R and Leng R A 2009: Nitrate as a fermentable nitrogen supplement for goats fed forage based diets low in true protein. Livestock Research for Rural Development. Volume 21, Article #10. http://www.lrrd.org/lrrd21/1/trin21010.htm

 Van, D.T.T., Ledin, I. & Mui, N.T. 2002. Feed intake and behaviour of kids and lambs fed sugar cane as the sole roughage with or without concentrate. Animal Feed Science and Technology 100 (1-2), 79-91

Van, D.T.T., Mui, N.T. & Ledin, I. 2005. Tropical foliages: Effect of presentation method and species on intake by goats Animal Feed Science and Technology 118, 1-17

Vo Lam and Ledin Inger 2004: Effect of feeding different proportions of sweet potato vines (Ipomoea batatas L. (Lam.))and Sesbania grandiflora foliage in the diet on feed intake and growth of goats. Livestock Research for Rural Development. Vol. 16, Art. #77. Retrieved, from http://www.lrrd.org/lrrd16/10/lam16077.htm

Yen Nhi N H and Preston T R 2011: The growth and economics of integrated culture of Tilapia (Oreochomis niloticus) and Common carp (Ciprinus carpio) in an indoor intensive system with earthworms as feed and in natural ponds fertilized with biodigester effluent and supplemented with d