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African Crop Science Journal
African Crop Science Society
ISSN: 1021-9730 EISSN: 1021-9730
Vol. 5, No. 3, 1997, pp. 273-284
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Bioline Code: cs97034
Full paper language: English
Document type: Research Article
Document available free of charge
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African Crop Science Journal, Vol. 5, No. 3, 1997, pp. 273-284
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Moukam, A. & Ngakanou, D.
Résumé
Les sols sous foret humide du Cameroon sont generalement consideres
comme des sols ferrallitiques. A cause de la poussee demograpnique dans le
pays, on pense de plus en plus a l'intensification de l'agriculture dans
cette zone forestiere humide, mais on ne dispose pas assez d'informations
tables sur la fertilite naturelie de ces sols. Pour evaluer cette
fertilite, 313 echantillons de sols superficiels ont ete collectes dans
toute la zone forestiere du Sud Cameroun. Les analyses au niveau du
laboratoire ont porte sur le pH, l'aluminium echangeabie, la capacite
d'echange cationique, les elements majeurs, la matiere organique et la
texture. Les resultats obtenus ont montre une forte proportion des sols
acides, des valeurs basses de matiere organique, de la capacitie d'echange
cationique, des bases echangeables; des deficiences en azote, phosphore et
potassium, une saturation en aluminium du complexe d'echange relativement
elevee. On note en general une correlation significative entre le niveau
eleve des elements nutritifs et l'abondance de la matiere organique. Malgre
l'existence d'une grande variation en texture, elle ne semble pas
constituer un facteur limitant pour l'utilisation intensive de ces sols.
Mots Clés
Sols ferrallitiques, forets humides, Sud du Cameroun, sols superficiels
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en |
The fertility status of surface soils in the humid forest zone of Southern Cameroon
Moukam, A. & Ngakanou, D.
Abstract
Soils under humid forest vegetation of Cameroon are generally classified as
"Ferrallitic soils". With the increasing population in the country,
agriculture is becoming more intensive in this humid forest zone but there
is little information available on the fertility status of these soils. In
order to better describe these soils, 313 soil samples were collected in
the Southern Cameroon. Laboratory analyses including pH, exchangeable
aluminium, cation exchange capacity, macro-nutrient levels, organic matter,
total nitrogen and texture, were conducted. The results obtained indicate
the following tendencies: low pH, low organic matter content, low level of
effective cation exchange capacity and bases; nitrogen, phosphorus and
potasium deficiencies and a relatively high degree ofaluminium saturation
of the exchange complex. Generally the nutrient level are higher where
organic matter is more abundant. Though there is a wide variation in
texture, it seems not to be a limiting factor for the intensive
agricultural use of these soils.
Keywords
Ferrallitic soils, humid forest, Southern Cameroon, topsoils
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© Copyright 1997 - African Crop Science Society
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