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Samaru Research bulletin. The use of fertilisers in the maintenance of soil fertility under intensive cropping in northern Nigeria / Heathcote, R.G.
Titre de série : Samaru Research bulletin Titre : The use of fertilisers in the maintenance of soil fertility under intensive cropping in northern Nigeria Type de document : texte imprimé Auteurs : Heathcote, R.G. Mention d'édition : IAR/SABU Editeur : IAR/SABU Année de publication : 1975 ISBN/ISSN/EAN : CI-10832 Note générale : Long - term trials carried out at three sites in Northern Nigeria have shown that high crop yields can be maintained for at least five years under intensive conditions through the judicious use of fertilisers on their own. Under use these conditions, accessions of organic material from roots and from laef shedding are sufficient to maintain soil organic matter at a level, which altough low, appears to be adequate. the limmitation of annual fertiliser trials, and of long term ones which include the faillure to identify the need of nic nature, are pounted out. The failure to identify the need of potasium fertiliser is partcularly emphasised as an illustration of the erroneous conclusions that may be drawn. The work described in this paper has clearly shown that the use of potassium fertiliser is essential unda ntensive and continuous agriculture in some areas. Langues : Anglais (eng) Mots-clés : Fertilisation Sol Maintenance Récolte Pollution Culture intensive Index. décimale : 628.55 Pollution du sol Résumé : Long - term trials carried out at three sites in Northern Nigeria have shown that high crop yields can be maintained for at least five years under intensive conditions through the judicious use of fertilisers on their own. Under use these conditions, accessions of organic material from roots and from laef shedding are sufficient to maintain soil organic matter at a level, which altough low, appears to be adequate. the limmitation of annual fertiliser trials, and of long term ones which include the faillure to identify the need of nic nature, are pounted out. The failure to identify the need of potasium fertiliser is partcularly emphasised as an illustration of the erroneous conclusions that may be drawn. The work described in this paper has clearly shown that the use of potassium fertiliser is essential unda ntensive and continuous agriculture in some areas. Note de contenu : Long - term trials carried out at three sites in Northern Nigeria have shown that high crop yields can be maintained for at least five years under intensive conditions through the judicious use of fertilisers on their own. Under use these conditions, accessions of organic material from roots and from laef shedding are sufficient to maintain soil organic matter at a level, which altough low, appears to be adequate. the limmitation of annual fertiliser trials, and of long term ones which include the faillure to identify the need of nic nature, are pounted out. The failure to identify the need of potasium fertiliser is partcularly emphasised as an illustration of the erroneous conclusions that may be drawn. The work described in this paper has clearly shown that the use of potassium fertiliser is essential unda ntensive and continuous agriculture in some areas. Samaru Research bulletin. The use of fertilisers in the maintenance of soil fertility under intensive cropping in northern Nigeria [texte imprimé] / Heathcote, R.G. . - IAR/SABU . - IAR/SABU, 1975.
ISSN : CI-10832
Long - term trials carried out at three sites in Northern Nigeria have shown that high crop yields can be maintained for at least five years under intensive conditions through the judicious use of fertilisers on their own. Under use these conditions, accessions of organic material from roots and from laef shedding are sufficient to maintain soil organic matter at a level, which altough low, appears to be adequate. the limmitation of annual fertiliser trials, and of long term ones which include the faillure to identify the need of nic nature, are pounted out. The failure to identify the need of potasium fertiliser is partcularly emphasised as an illustration of the erroneous conclusions that may be drawn. The work described in this paper has clearly shown that the use of potassium fertiliser is essential unda ntensive and continuous agriculture in some areas.
Langues : Anglais (eng)
Mots-clés : Fertilisation Sol Maintenance Récolte Pollution Culture intensive Index. décimale : 628.55 Pollution du sol Résumé : Long - term trials carried out at three sites in Northern Nigeria have shown that high crop yields can be maintained for at least five years under intensive conditions through the judicious use of fertilisers on their own. Under use these conditions, accessions of organic material from roots and from laef shedding are sufficient to maintain soil organic matter at a level, which altough low, appears to be adequate. the limmitation of annual fertiliser trials, and of long term ones which include the faillure to identify the need of nic nature, are pounted out. The failure to identify the need of potasium fertiliser is partcularly emphasised as an illustration of the erroneous conclusions that may be drawn. The work described in this paper has clearly shown that the use of potassium fertiliser is essential unda ntensive and continuous agriculture in some areas. Note de contenu : Long - term trials carried out at three sites in Northern Nigeria have shown that high crop yields can be maintained for at least five years under intensive conditions through the judicious use of fertilisers on their own. Under use these conditions, accessions of organic material from roots and from laef shedding are sufficient to maintain soil organic matter at a level, which altough low, appears to be adequate. the limmitation of annual fertiliser trials, and of long term ones which include the faillure to identify the need of nic nature, are pounted out. The failure to identify the need of potasium fertiliser is partcularly emphasised as an illustration of the erroneous conclusions that may be drawn. The work described in this paper has clearly shown that the use of potassium fertiliser is essential unda ntensive and continuous agriculture in some areas. Réservation
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Code-barres Cote Support Localisation Section Disponibilité CI04B832.129979 CI-10832 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI04B832.129980 CI-10832 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI04B832.129981 CI-10832 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI04B832.129982 CI-10832 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI04B832.129983 CI-10832 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI04B832.129984 CI-10832 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI04B832.129985 CI-10832 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI04B832.129986 CI-10832 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible Samaru Research bulletin, 204. Determination of relevant research priorities for farm development in West Africa / Norman, D. W.
Titre de série : Samaru Research bulletin, 204 Titre : Determination of relevant research priorities for farm development in West Africa Type de document : texte imprimé Auteurs : Norman, D. W. ; Simmons, E. B. Année de publication : 1974 ISBN/ISSN/EAN : CI-06630 Note générale : this paper discusses the determination of relevant research priorities for farm development in West Africa in the larger content of the whole research process from the formulation of broadly relevant research priorities to the specification of appropriate and consistent research programmes and projects to the carrying out of the designated projects with the subsequent feedback of those experiences and results into the re-formulation process. Langues : Anglais (eng) Mots-clés : Recherche AGRONOMIE Economie rurale Développement agricole Index. décimale : 338.5 Economie de la production, micro-économie Résumé : this paper discusses the determination of relevant research priorities for farm development in West Africa in the larger content of the whole research process from the formulation of broadly relevant research priorities to the specification of appropriate and consistent research programmes and projects to the carrying out of the designated projects with the subsequent feedback of those experiences and results into the re-formulation process. Note de contenu : this paper discusses the determination of relevant research priorities for farm development in West Africa in the larger content of the whole research process from the formulation of broadly relevant research priorities to the specification of appropriate and consistent research programmes and projects to the carrying out of the designated projects with the subsequent feedback of those experiences and results into the re-formulation process. Samaru Research bulletin, 204. Determination of relevant research priorities for farm development in West Africa [texte imprimé] / Norman, D. W. ; Simmons, E. B. . - 1974.
ISSN : CI-06630
this paper discusses the determination of relevant research priorities for farm development in West Africa in the larger content of the whole research process from the formulation of broadly relevant research priorities to the specification of appropriate and consistent research programmes and projects to the carrying out of the designated projects with the subsequent feedback of those experiences and results into the re-formulation process.
Langues : Anglais (eng)
Mots-clés : Recherche AGRONOMIE Economie rurale Développement agricole Index. décimale : 338.5 Economie de la production, micro-économie Résumé : this paper discusses the determination of relevant research priorities for farm development in West Africa in the larger content of the whole research process from the formulation of broadly relevant research priorities to the specification of appropriate and consistent research programmes and projects to the carrying out of the designated projects with the subsequent feedback of those experiences and results into the re-formulation process. Note de contenu : this paper discusses the determination of relevant research priorities for farm development in West Africa in the larger content of the whole research process from the formulation of broadly relevant research priorities to the specification of appropriate and consistent research programmes and projects to the carrying out of the designated projects with the subsequent feedback of those experiences and results into the re-formulation process. Réservation
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Code-barres Cote Support Localisation Section Disponibilité CI03B630.133090 CI-06630 Rapport Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B630.133088 CI-06630 Rapport Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B630.133089 CI-06630 Rapport Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B630.133087 CI-06630 Rapport Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B630.133086 CI-06630 Rapport Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B630.133084 CI-06630 Rapport Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B630.133085 CI-06630 Rapport Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B630.133083 CI-06630 Rapport Bibliothèque CDI-Ouaga Fond documentaire Disponible Samaru Research bulletin. Effects of previous crop on yield and nitrogen response of maize at Samaru (Nigeria) / Jones, J. M.
Titre de série : Samaru Research bulletin Titre : Effects of previous crop on yield and nitrogen response of maize at Samaru (Nigeria) Type de document : texte imprimé Auteurs : Jones, J. M. Année de publication : 1974 ISBN/ISSN/EAN : CI-04059 Note générale : Maize yield were significantly affected by the nature of the previous crop. Maize following groundnuts significantly outyielded maize following cotton, which in turn significantly out yielded maize following sorghum or cowpeas, and this order was largely independent of the nitrogen fertilizer regime applied to the maize. Analyses of soil and crop showed that groundnut increased nitrogen availability in the topsoil, but there was little evidence of any similar advantage after cowpeas. Langues : Anglais (eng) Mots-clés : Mais Culture vivrière Azote Expérimentation AGRONOMIE Méthodologie Fertilisation Agronomie GENIE RURAL Index. décimale : 630 Agriculture et techniques connexes Résumé : Maize yield were significantly affected by the nature of the previous crop. Maize following groundnuts significantly outyielded maize following cotton, which in turn significantly out yielded maize following sorghum or cowpeas, and this order was largely independent of the nitrogen fertilizer regime applied to the maize. Analyses of soil and crop showed that groundnut increased nitrogen availability in the topsoil, but there was little evidence of any similar advantage after cowpeas. Note de contenu : Maize yield were significantly affected by the nature of the previous crop. Maize following groundnuts significantly outyielded maize following cotton, which in turn significantly out yielded maize following sorghum or cowpeas, and this order was largely independent of the nitrogen fertilizer regime applied to the maize. Analyses of soil and crop showed that groundnut increased nitrogen availability in the topsoil, but there was little evidence of any similar advantage after cowpeas. Samaru Research bulletin. Effects of previous crop on yield and nitrogen response of maize at Samaru (Nigeria) [texte imprimé] / Jones, J. M. . - 1974.
ISSN : CI-04059
Maize yield were significantly affected by the nature of the previous crop. Maize following groundnuts significantly outyielded maize following cotton, which in turn significantly out yielded maize following sorghum or cowpeas, and this order was largely independent of the nitrogen fertilizer regime applied to the maize. Analyses of soil and crop showed that groundnut increased nitrogen availability in the topsoil, but there was little evidence of any similar advantage after cowpeas.
Langues : Anglais (eng)
Mots-clés : Mais Culture vivrière Azote Expérimentation AGRONOMIE Méthodologie Fertilisation Agronomie GENIE RURAL Index. décimale : 630 Agriculture et techniques connexes Résumé : Maize yield were significantly affected by the nature of the previous crop. Maize following groundnuts significantly outyielded maize following cotton, which in turn significantly out yielded maize following sorghum or cowpeas, and this order was largely independent of the nitrogen fertilizer regime applied to the maize. Analyses of soil and crop showed that groundnut increased nitrogen availability in the topsoil, but there was little evidence of any similar advantage after cowpeas. Note de contenu : Maize yield were significantly affected by the nature of the previous crop. Maize following groundnuts significantly outyielded maize following cotton, which in turn significantly out yielded maize following sorghum or cowpeas, and this order was largely independent of the nitrogen fertilizer regime applied to the maize. Analyses of soil and crop showed that groundnut increased nitrogen availability in the topsoil, but there was little evidence of any similar advantage after cowpeas. Réservation
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Code-barres Cote Support Localisation Section Disponibilité CI03B059.133251 CI-04059 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B059.133252 CI-04059 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B059.133253 CI-04059 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B059.133254 CI-04059 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B059.133255 CI-04059 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B059.133256 CI-04059 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B059.133257 CI-04059 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B059.133258 CI-04059 Périodique Bibliothèque CDI-Ouaga Fond documentaire Disponible Samaru Research bulletin, 136. The organic matter content of the savana soils of West Africa / Jones, M. J.
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 Samaru Research bulletin, 178. Rural economy in the Zaria area, with special reference to agriculture / Porman, D. W.
Titre de série : Samaru Research bulletin, 178 Titre : Rural economy in the Zaria area, with special reference to agriculture Type de document : texte imprimé Auteurs : Porman, D. W. Mention d'édition : Institute for Agricultural Research Editeur : Institute for Agricultural Research Année de publication : 1973 ISBN/ISSN/EAN : CI-10215 Note générale : The purpose of this document is to give a brief description of the economy of the rural area Surrounding Zaria. In order to achieve this a few results are presented from a Surdey under taken from April 1966 to March 1967 pertaining to three Villages differing in distance from and ease of communication with Zaria. The three villages are Hanwa, Doka, Dan Mahawayi. Langues : Anglais (eng) Mots-clés : Développement rural Agriculture Economie rurale Index. décimale : 307.72 développement rural Résumé : The purpose of this document is to give a brief description of the economy of the rural area Surrounding Zaria. In order to achieve this a few results are presented from a Surdey under taken from April 1966 to March 1967 pertaining to three Villages differing in distance from and ease of communication with Zaria. The three villages are Hanwa, Doka, Dan Mahawayi. Note de contenu : The purpose of this document is to give a brief description of the economy of the rural area Surrounding Zaria. In order to achieve this a few results are presented from a Surdey under taken from April 1966 to March 1967 pertaining to three Villages differing in distance from and ease of communication with Zaria. The three villages are Hanwa, Doka, Dan Mahawayi. Samaru Research bulletin, 178. Rural economy in the Zaria area, with special reference to agriculture [texte imprimé] / Porman, D. W. . - Institute for Agricultural Research . - Institute for Agricultural Research, 1973.
ISSN : CI-10215
The purpose of this document is to give a brief description of the economy of the rural area Surrounding Zaria. In order to achieve this a few results are presented from a Surdey under taken from April 1966 to March 1967 pertaining to three Villages differing in distance from and ease of communication with Zaria. The three villages are Hanwa, Doka, Dan Mahawayi.
Langues : Anglais (eng)
Mots-clés : Développement rural Agriculture Economie rurale Index. décimale : 307.72 développement rural Résumé : The purpose of this document is to give a brief description of the economy of the rural area Surrounding Zaria. In order to achieve this a few results are presented from a Surdey under taken from April 1966 to March 1967 pertaining to three Villages differing in distance from and ease of communication with Zaria. The three villages are Hanwa, Doka, Dan Mahawayi. Note de contenu : The purpose of this document is to give a brief description of the economy of the rural area Surrounding Zaria. In order to achieve this a few results are presented from a Surdey under taken from April 1966 to March 1967 pertaining to three Villages differing in distance from and ease of communication with Zaria. The three villages are Hanwa, Doka, Dan Mahawayi. Réservation
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Code-barres Cote Support Localisation Section Disponibilité CI03B215.143347 CI-10215 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B215.143348 CI-10215 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B215.143349 CI-10215 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B215.143350 CI-10215 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B215.143351 CI-10215 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B215.143352 CI-10215 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B215.143353 CI-10215 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible CI03B215.143354 CI-10215 Monographie Bibliothèque CDI-Ouaga Fond documentaire Disponible Samaru Research bulletin, 199. Lande tenure, land holding and agricultural development in the central Sokoto, close settled zone, Nigeria / Goddard, A. D.
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