Amélioration de la croissance et des paramètres agronomiques du maïs (Zea mays L.) par des composts de déchets dans la carrière des calcaires de Sika-Kondji au Sud-Togo

Mineral resources exploitation is one of the main causes of soil degradation and pollution. Restoration of mines after exploitation is a priority of mining companies. In this work, we studied the possibility of using the putrescible and minerals wastes from a limestone plant of Sika-Kondji to fertilize the topsoil. Agronomic tests were conducted with corn to validate the potential of composts compared to a control. The results indicate that composts C1 (green waste), C2 (green waste + food) and C4 (food + green wastes + limestone and clay) allowed a good growth of plants relative to control. Plants grown on C2 and C4 composts presented the best agronomic performance. These composts are rich in organic matter, nitrogen, phosphorus and potassium with a high electrical conductivity. These composts need to be improved and valued in the restoration program of Sika-Kondji mine