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.