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This study uses an ex-post evaluation method to estimate the optimal external funding level that maximizes the benefit of agro-pastoral enterprises supported by the youth program for the Promotion of Entrepreneurship in Agro-pastoral Activities (PEA-Youth Program) in the Centre region of Cameroon. The Linear Programming (LP) model recommends a personal contribution between 238,510 and 995,000 FCFA for each enterprise. It also recommends full use of start-up/subsidized credit (1,200,000 FCFA) for each activity, which can be justified by its zero interest rate (0%) as compared to the productive credit (15% interest rate) whose use(<1,500,000 FCFA) is recommended for short cycle activities (poultry, maize) and not recommended for long cycle activities (piggery, plantain, cassava production). The results of LP rotation restriction are similar to the profitability results using the economic rate of return (ERR) and suggest monoculture as profitable to only one activity (plantain), while the four remaining enterprises (maize, piggery, poultry, cassava) could be profitable if undertaken simultaneously or in association. Hence, the PEA-Youth Program should consider funding several activities at the same time, increasing the level of subsidized credit for short cycle agro-pastoral enterprises whereas productive credit should instead be revised downwards or eliminated completely for long cycle activities.

This paper analyses the possibility of substitution between compost and mineral fertilizer in order to assess the impact on the foreign exchange savings in Cameroon of increasing the use of compost. In this regard, a partial equilibrium model was built up and used as a tool for policy simulations. The review of existing literature already suggests that, the compost commercial value i.e. value of substitution (33,740 FCFA tonne(-1)) is higher compared to the compost real price (30,000 FCFA tonne(-1)), proving that it could be profitable to substitute the mineral fertilizer by compost. Further results from the scenarios used in the modelling exercise show that, increasing the compost availability is the most favourable policy for the substitution of mineral fertilizer by compost. This policy helps to save about 18.55% of the annual imported mineral fertilizer quantity and thus to avoid approximately 8.47% of the yearly total import expenditure in Cameroon. The policy of decreasing the transport rate of compost in regions that are far from the city is also favourable to the substitution. Therefore, in order to encourage the substitution of mineral fertilizer by compost, programmes of popularization of compost should be highlighted and be among the top priorities in the agricultural policy of the Cameroon government.

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