**Abstract**

Investigations to assess farmer's perceptions on the fertilizing potential of associated trees species in cocoa agroforest of degraded forest ecology were carried out in southern Cameroon. The perception of the farmers was based on the ability of the trees to maintain or improve soil fertility of their farms. The verification of these perceptions was done through an evaluation of litter fall biomass nutrient content (N, P, K, Ca and Mg) of selected trees. The top 5 associates trees ranked by farmers was: *Milicia excelsa, Ceiba pentandra, Ficus mucuso, Asltonia boonei, Terminalia superba.* The chemical analysis of the leaf litter from the different tree species revealed a significant different between their chemical components. N appeared to have the highest concentrations varying from 2.82 to 5.57% with a mean value of 4.25 ± 1.065%, P had the lowest concentrations typically around 0.001%. The top 5 tree species based on the chemical analysis ranking were: *C. pentandra*, *M. excelsa*, *Eribroma oblungum*, *Alstonia boonei*, *Zanthoxylum heitzi.* Farmer's perceptions thou holistic, are not completely different from scientific finding. Therefore, they should be taken in consideration in management plans for cocoa- based systems in order to enhance their ecological and economic performance.

**Keywords:** Farmer's perception, associated trees, fertilizing potential, Cocoa, Agroforestry
