Food security remains a key challenge in many Sub-Saharan African countries and in Kenya in particular. Kenya addresses this concern with a noteworthy policy mix, aiming at giving to the agricultural sector a leading task in improving food security. In this paper, through a Computable General Equilibrium (CGE) model specifically modified for the context of developing country analyses, we address the impacts of the construction of a new fertilizer plant on the agricultural sector and the rest of the economy. For the purpose of the study, a desegregated version of a 2014 Social Accounting Matrix (SAM) has been developed. Results suggests that increasing domestic production of fertilizers do not fully achieve the objectives of reducing rural poverty and increasing agricultural production without complementary policies that help small-holder farmers to overcome the backward technology trap and give them better access to input and output markets.