International Journal of Academic Engineering Research (IJAER)   Year: 2021 | Volume: 5 | Issue: 5 | Page No.: 3-7 Research of the Causes that Influence the Efficient Use of Agricultural Machinery Imported in Guinea Fodé KEITA, Sayon Doumbouya, Serima Camara, Elodie Olamou, Ansoumane Sakouvogui /> Abstract: : Guinea is considered one of the largest importers of agricultural machinery in the sub-region, but it fails to achieve the main goal of food self-sufficiency, which will later lead to food security. Based on the development of cultivable land, harvests, in short the operations of agricultural production, we find that achieving objectives with agricultural machinery is difficult. In this article, we seek to understand the causes that influence the efficiency of different imported agricultural machinery. The research revealed the following: operators have little knowledge of upkeep and maintenance; studies around two different tractors revealed a common negative influence (tractors are imported without their original equipment); which plays a lot on them during construction. It also appears that the Chinese tractor FS704 adapts better to the operating conditions of Faranah than the American Massey Ferguson tractor with mechanical steering and after-sales service contracts do not exist and do not apply at any level in Guinea.