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Alley farming is an agroforestry system that utilizes trees for maintaining soil fertility and improving livestock production. This research assessed the nutrients and nutritive values of the leaves of four alley woody species: Cajanus cajan, Gliricidia sepium, Flamingia macrophylla and Leucaena leucocephala used at the agroforestry research farm of Department of Forestry and Environmental Management, Michael Okpara University of Agriculture, Umudike, Nigeria. Umudike. The results obtained showed that the leaves of the alley woody species contained: N, P, K, Ca, Mg and heavy metals like: Fe, Pb, Zn, and Cd in significant quantity while Cr was trace amount. Ni content was not significant (P>0.05). They also contained high moisture, Crude fibre, Crude protein, Carbohydrate and vitamins. The four alley woody species could be an ideal combination in alley farming system in revitalizing poor agricultural soil through litterfall and nutrient cycling and as well provide forage for livestock production.
Keywords: Alley farming, alley woody species, nutrient content, nutritive value