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Auteur Jones, M. J. |
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Faire une suggestion Affiner la rechercheJournal of Soil Science. The organic matter content of the Savanna Soils of West Africa / Jones, M. J.
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texte imprimé Auteurs : Jones, M. J. Année de publication : 1973 ISBN/ISSN/EAN : CI-10040 Note générale : Published and unpublished data on the amonts of organic matter and nitrogen in the surface soils of the west african Savanna are reviewed.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 décimale : 630 Agriculture et techniques connexes Résumé : Published and unpublished data on the amonts of organic matter and nitrogen in the surface soils of the west african Savanna are reviewed.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. Réservation
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Code-barres Cote Support Localisation Section Disponibilité CI04N040.143363 CI-10040 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI04N040.143364 CI-10040 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI04N040.143365 CI-10040 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI04N040.143366 CI-10040 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI04N040.143367 CI-10040 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI04N040.143368 CI-10040 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI04N040.143369 CI-10040 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI04N040.143370 CI-10040 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible
Titre de série : Samaru Miscellaneous Paper (IAR) Titre : A review of the use of rock phosphate as fertilizers in francophone West Africa Type de document : texte imprimé Auteurs : Jones, M. J. Mention d'édition : Institute for Agricultural Research Editeur : Institute for Agricultural Research Année de publication : 1973 ISBN/ISSN/EAN : CI-03120 Note générale : This paper reviews the agronomic results of trials with rock phosphate in francophone West Africa and consider briefly thein relevance to the niegrian situation. Langues : Anglais (eng) Mots-clés : Phosphate Engrais Agriculture Recherche Agronomie Fertilisation Index. décimale : 630 Agriculture et techniques connexes Résumé : This paper reviews the agronomic results of trials with rock phosphate in francophone West Africa and consider briefly thein relevance to the niegrian situation. Note de contenu : This paper reviews the agronomic results of trials with rock phosphate in francophone West Africa and consider briefly thein relevance to the niegrian situation. Samaru Miscellaneous Paper (IAR). A review of the use of rock phosphate as fertilizers in francophone West Africa [texte imprimé] / Jones, M. J. . - Institute for Agricultural Research . - Institute for Agricultural Research, 1973.
ISSN : CI-03120
This paper reviews the agronomic results of trials with rock phosphate in francophone West Africa and consider briefly thein relevance to the niegrian situation.
Langues : Anglais (eng)
Mots-clés : Phosphate Engrais Agriculture Recherche Agronomie Fertilisation Index. décimale : 630 Agriculture et techniques connexes Résumé : This paper reviews the agronomic results of trials with rock phosphate in francophone West Africa and consider briefly thein relevance to the niegrian situation. Note de contenu : This paper reviews the agronomic results of trials with rock phosphate in francophone West Africa and consider briefly thein relevance to the niegrian situation. Réservation
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Code-barres Cote Support Localisation Section Disponibilité CI03B120.141963 CI-03120 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B120.141964 CI-03120 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B120.141965 CI-03120 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B120.141966 CI-03120 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B120.141967 CI-03120 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B120.141968 CI-03120 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B120.141969 CI-03120 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B120.141970 CI-03120 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible
Titre de série : Samaru Research bulletin, 136 Titre : The organic matter content of the savana soils of West Africa Type de document : texte imprimé Auteurs : Jones, M. J. Mention d'édition : Institute for Agricultural Research, Ahmadu Bello university Editeur : Institute for Agricultural Research, Ahmadu Bello university Année de publication : 1973 ISBN/ISSN/EAN : CI-05311 Note générale : Published and unpublished data on the amounts of organic matter and nitrogen in the surface soil of the West african savanna are reviewed. In general, amounts are small/ the mean carbon content of soils from 605 well - drained sites was 0.68 per cent. Two important 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 wet season and represented here by mean annual rainfall. Langues : Anglais (eng) Mots-clés : Sol Matière organique Savane Agronomie Génie rural Mise en valeur Index. décimale : 631.4 Pédologie, science et préservation des sols : chimie, physique, fertilité Résumé : Published and unpublished data on the amounts of organic matter and nitrogen in the surface soil of the West african savanna are reviewed. In general, amounts are small/ the mean carbon content of soils from 605 well - drained sites was 0.68 per cent. Two important 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 wet season and represented here by mean annual rainfall. Note de contenu : Published and unpublished data on the amounts of organic matter and nitrogen in the surface soil of the West african savanna are reviewed. In general, amounts are small/ the mean carbon content of soils from 605 well - drained sites was 0.68 per cent. Two important 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 wet season and represented here by mean annual rainfall. Samaru Research bulletin, 136. The organic matter content of the savana soils of West Africa [texte imprimé] / Jones, M. J. . - Institute for Agricultural Research, Ahmadu Bello university . - Institute for Agricultural Research, Ahmadu Bello university, 1973.
ISSN : CI-05311
Published and unpublished data on the amounts of organic matter and nitrogen in the surface soil of the West african savanna are reviewed. In general, amounts are small/ the mean carbon content of soils from 605 well - drained sites was 0.68 per cent. Two important 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 wet season and represented here by mean annual rainfall.
Langues : Anglais (eng)
Mots-clés : Sol Matière organique Savane Agronomie Génie rural Mise en valeur Index. décimale : 631.4 Pédologie, science et préservation des sols : chimie, physique, fertilité Résumé : Published and unpublished data on the amounts of organic matter and nitrogen in the surface soil of the West african savanna are reviewed. In general, amounts are small/ the mean carbon content of soils from 605 well - drained sites was 0.68 per cent. Two important 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 wet season and represented here by mean annual rainfall. Note de contenu : Published and unpublished data on the amounts of organic matter and nitrogen in the surface soil of the West african savanna are reviewed. In general, amounts are small/ the mean carbon content of soils from 605 well - drained sites was 0.68 per cent. Two important 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 wet season and represented here by mean annual rainfall. Réservation
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Code-barres Cote Support Localisation Section Disponibilité CI03B311.142163 CI-05311 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B311.142164 CI-05311 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B311.142165 CI-05311 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B311.142166 CI-05311 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B311.142167 CI-05311 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B311.142168 CI-05311 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B311.142169 CI-05311 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B311.142170 CI-05311 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible
