Journal of Soil Science. The organic matter content of the Savanna Soils of West Africa / Jones, M. J.

Public ISBD Titre de série : Journal of Soil Science Titre : The organic matter content of the Savanna Soils of West Africa Type de document : texte imprimé Auteurs : Jones, M. J. Année de publication : 1973 ISBN/ISSN/EAN : CI-10040 Note générale : Published and unpublished data on the amonts of organic matter and nitrogen in the surface soils of the west african Savanna are reviewed. In general, amounts are small/ the mean carbone content of soils from 605 well-drained sites is 0.68 per cent. Two importants factors governing amounts of organic matter in well-drained soils appear to be the clay content and a moisture factor related to the length of the west season and represented here by mean annual rainfall. Multiple linear regression on soil clay content and rainfall accounted for 46.5 per cent and 57.2 per cent, respectively, of the observed variability of soil charbon and citrogen contents. These findings suggest that the low levels of organic matter in Savanna soils arise from their predominantly sandy nature and from the relatively low significantly related to clay content and rainfall. The influence of human interference and of parent material and altitude an organic matter is demonstrated in the context of geographically limited area within the Savanna for which more detailed information is available. Langues : Anglais (eng) Mots-clés : Agriculture  Sol  Pluviométrie  Matière organique  Analyse chimique  Agronomie  Savane Index. décimale : 630 Agriculture et techniques connexes Résumé : Published and unpublished data on the amonts of organic matter and nitrogen in the surface soils of the west african Savanna are reviewed. In general, amounts are small/ the mean carbone content of soils from 605 well-drained sites is 0.68 per cent. Two importants factors governing amounts of organic matter in well-drained soils appear to be the clay content and a moisture factor related to the length of the west season and represented here by mean annual rainfall. Multiple linear regression on soil clay content and rainfall accounted for 46.5 per cent and 57.2 per cent, respectively, of the observed variability of soil charbon and citrogen contents. These findings suggest that the low levels of organic matter in Savanna soils arise from their predominantly sandy nature and from the relatively low significantly related to clay content and rainfall. The influence of human interference and of parent material and altitude an organic matter is demonstrated in the context of geographically limited area within the Savanna for which more detailed information is available. Note de contenu : Published and unpublished data on the amonts of organic matter and nitrogen in the surface soils of the west african Savanna are reviewed. In general, amounts are small/ the mean carbone content of soils from 605 well-drained sites is 0.68 per cent. Two importants factors governing amounts of organic matter in well-drained soils appear to be the clay content and a moisture factor related to the length of the west season and represented here by mean annual rainfall. Multiple linear regression on soil clay content and rainfall accounted for 46.5 per cent and 57.2 per cent, respectively, of the observed variability of soil charbon and citrogen contents. These findings suggest that the low levels of organic matter in Savanna soils arise from their predominantly sandy nature and from the relatively low significantly related to clay content and rainfall. The influence of human interference and of parent material and altitude an organic matter is demonstrated in the context of geographically limited area within the Savanna for which more detailed information is available. Journal of Soil Science. The organic matter content of the Savanna Soils of West Africa [texte imprimé] / Jones, M. J. . - 1973. ISSN : CI-10040 Published and unpublished data on the amonts of organic matter and nitrogen in the surface soils of the west african Savanna are reviewed. In general, amounts are small/ the mean carbone content of soils from 605 well-drained sites is 0.68 per cent. Two importants factors governing amounts of organic matter in well-drained soils appear to be the clay content and a moisture factor related to the length of the west season and represented here by mean annual rainfall. Multiple linear regression on soil clay content and rainfall accounted for 46.5 per cent and 57.2 per cent, respectively, of the observed variability of soil charbon and citrogen contents. These findings suggest that the low levels of organic matter in Savanna soils arise from their predominantly sandy nature and from the relatively low significantly related to clay content and rainfall. The influence of human interference and of parent material and altitude an organic matter is demonstrated in the context of geographically limited area within the Savanna for which more detailed information is available. Langues : Anglais (eng) Mots-clés : Agriculture  Sol  Pluviométrie  Matière organique  Analyse chimique  Agronomie  Savane Index. décimale : 630 Agriculture et techniques connexes Résumé : Published and unpublished data on the amonts of organic matter and nitrogen in the surface soils of the west african Savanna are reviewed. In general, amounts are small/ the mean carbone content of soils from 605 well-drained sites is 0.68 per cent. Two importants factors governing amounts of organic matter in well-drained soils appear to be the clay content and a moisture factor related to the length of the west season and represented here by mean annual rainfall. Multiple linear regression on soil clay content and rainfall accounted for 46.5 per cent and 57.2 per cent, respectively, of the observed variability of soil charbon and citrogen contents. These findings suggest that the low levels of organic matter in Savanna soils arise from their predominantly sandy nature and from the relatively low significantly related to clay content and rainfall. The influence of human interference and of parent material and altitude an organic matter is demonstrated in the context of geographically limited area within the Savanna for which more detailed information is available. Note de contenu : Published and unpublished data on the amonts of organic matter and nitrogen in the surface soils of the west african Savanna are reviewed. In general, amounts are small/ the mean carbone content of soils from 605 well-drained sites is 0.68 per cent. Two importants factors governing amounts of organic matter in well-drained soils appear to be the clay content and a moisture factor related to the length of the west season and represented here by mean annual rainfall. Multiple linear regression on soil clay content and rainfall accounted for 46.5 per cent and 57.2 per cent, respectively, of the observed variability of soil charbon and citrogen contents. These findings suggest that the low levels of organic matter in Savanna soils arise from their predominantly sandy nature and from the relatively low significantly related to clay content and rainfall. The influence of human interference and of parent material and altitude an organic matter is demonstrated in the context of geographically limited area within the Savanna for which more detailed information is available.

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