Assessment of residual effects of organic manures (Tithonia diversifolia and bat-guano) on maize cultivation in the Ngandajika region in central DR Congo

Abstract

It has been clearly established that organic matter provides crops with not only nutrients, although in a lower proportion compared to mineral fertilizers, it releases them slowly and gradually. In addition, it also improves the other characteristics of the soil and thus further conditions the fertility of the soil. Consequently, the study of organic manure should not only be limited to the analysis of its effects on the development and yield of crops, it should also extend to the examination of its impact on the maintenance or increasing soil fertility.