Improving the in-situ stem support system for yams

Wilson, G.F. & Akapa, K. (1981). Improving the in-situ stem support system for yams. In Tropical root crops: research strategies for the 1980s: proceedings of the First Triennial Root Crops Symposium of the International Society for Tropical Root Crops-Africa Branch, Ibadan, Nigeria. 8-12 Sept 1980. Ottawa, Canada. IDRC (p. 195-197).

Current methods and the importance of supporting yam vines and the significance of the yam crop in W. Africa are discussed. A support system based on the in situ stems from bush fallow was developed in Nigeria. The yield of yams was lower with in situ stems at 1.5 X 1.0 m spacings than with conventional staking at 1.0 X 1.0 m spacings but yields were similar when both support systems were at 1.5 X 1.0 m spacings. Leucaena leucocephala gave suitable support stems in 1-2 yr. The yields of yams given when L. leucocephala was used in a horizontal support system (tops and small branches thrown on the ground) or as conventional stakes were 25.5 and 25.9 t/ha, respectively.