A field experiment was conducted at the teaching and research farm of the Faculty of Agronomy and Agricultural Sciences of the University of Dschang to investigate the effects of potato–Mucuna intercropping pattern on the agronomic performances of potatoes and the soil physicochemical properties in western highlands of Cameroon. The experiment design was a randomized complete block with three replications. The treatments included a pure potato stand (T1), pure Mucuna stand (T2), 1:1 (T3), 1:2 (T4), and 2:1 (T5) potato–Mucuna intercropping patterns. The results revealed that potato–Mucuna intercropping patterns had no significant effect (P > 0.05) on potato growth variables, soil physical properties, and the relative crowding coefficient. The highest potato yield (24,913 kg ha−1) and potato equivalent yield (81,513 kg ha−1) were obtained from the 1:1 intercropping pattern. The highest total LER (2.17) and the lowest (1.38) were obtained with 1:1 and 1:2 intercropping patterns, respectively. Area time equivalent ratio values were greater than 1 in 1:1 (1.46) and 2:1 (1.29) intercropping patterns. Mucuna proved to be the most aggressive and competitive species according to Ap and competitive ratio values except for the 1:2 intercropping pattern with K indicating a yield advantage in all intercropping patterns. 1:1 and 2:1 intercropping patterns gave the best C/N (13.94) and cation exchange capacity (36.12 meq 100 g−1), respectively. Late blight incidence was highest (16.88%) on potato sole crop stand and lowest (8.05%) on 1:2 intercropping pattern. Therefore, based on the findings of this experiment, 1:1 or 1:2 intercropping pattern could be recommended in potato–Mucuna intercropping system.

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Smallholder farmer agricultural productivity in developing countries is more often diverse and limited by diverse constraints. For optimal agricultural production and income crops for diversification must be carefully selected and the constraints properly addressed. The objective of this study was to establish a list of the major crops planted in the Bamboutos mountain landscape and the constraints faced by the smallholder farmers. During a survey, 261 household heads responded were randomly selected and the questions administered to them. A majority of the household heads were men and were literate and most of them were younger than 55 years. Crop and livestock production were the main income generating activities of the respondents. Most of the farmers` land sizes were less than 5a and land ownership was through inheritance, purchase or rent. The small holder farmers in the study area planted a variety of both annual and perennial crops. These crops were sold, consumed or had ornamental/cultural values. The farmers faced a number of problems in animal and crop production with the most cited constraints being lack of inputs, lack of capital, bad roads and climate change. The results of this study suggest that crop diversification should be encouraged within the study area, policy and stakeholder intervention should concentrate on solving the cited constraints for sustainable food production and conservation of biodiversity. Keywords: Crops, Constraints, Diversification, Smallholders.