Hoang Nghia Duyet, 2003. Science & Technology Journal of Agriculture & Rural Development, 6: 707 Document reference Hoang Nghia Duyet, 2003. The effect of sweet-potato stem levels in the diet on productivity of Mong Cai sows. Science & Technology Journal of Agriculture & Rural Development, 6: 707Citation key Hoang Nghia Duyet, 2003Datasheets Sweet potato (Ipomoea batatas) forage