Abstract
Since ancient times, peasants have relied on the presence of some plants or animals to assess soi’s fertility. This study carried out in Dogo site in Niger and that aim is ti determine the main farmer indicators of soil fertility assessment. For this, an individual semi-structured questionnaire was administered to the farmers. Results showed that several types of biological indicators are used by farmers to assess soil’s fertility through the presence or absence of some plants and/or animals. Thus, Cenchrus biflorus, Cyperus alopeuroides, Alysicarpus ovalifolius, Brachiaria spp have been cited as non-woody fertility indicator species. As for Faidherbia albida, Acacia nilotica, Piliostigma reticulatum, they were cited as woody species indicative of fertile soils. Also, Striga hermonthica, Aristida stipoides, Ipomoea koschyana, Euphorbia forskalii, Ipomoea cosunosperma, Alysicarpus ovalifolius, Commelina benghalensis were considered as non-woody indicator species of poor soils and Prosopis juliflora, Lannasinarima indicuticosa in poor soils woody species.
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