Chlorite effects compared to sulfate in combination with forms of nitrogen on yields of oat and Chinese cabbage

To valorise sediments of iron mineral extraction zone of about 2500ha of coverage in Liberia, a concept of appropiate fertilizer was developed. A comparative study was carried out on two types of soil : a soil riched in organic matter called arable land and a soil formed exclusively with sediments called sediments or Tailings Pond. The results revealed that the choice of fertilizer types and forms played an important role in yield increase. Therefore, the best yields were obtained with the combination of the different forms of Nitrogen fertilizers and different forms of calcium and potassium fertilizers. The use of sawdust as supportive organic matter, from the different combinations, has increased or dercreased the yields of the two types of soils.