The Nutrient Status of Soils Under Peasant Cocoa Farms of Varying Ages in Southwestern Nigeria

Ekanade, O.

doi:10.1080/01448765.1988.9755137

Cited by 19 publications

(6 citation statements)

References 6 publications

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“…In the tropical rainforests, plants and soils are in equilibrium involving an almost closed cycling of nutrients which is achieved by a very high rate of litter production, rapid mineralization and a rapid attainment of equilibrium with respect to organic matter relationships (Bernherd-Raversat, 1987;Vitousek and Sanford, 1986;Terborgh, 1992). However, whenever the forest is cleared for cultivation, the plant -soil relationship is disrupted irrespective of whether field or tree crops are planted (Adejuwon and Ekanade, 1988). Even after the tree crops have matured, with their characteristics closed foliage, environmental degradation is not arrested, at least when compared with a mature tropical rainforest (Ojeniyi and Agbede, 1980;Adejuwon and Ekanade, 1988).…”

Section: Introductionmentioning

confidence: 99%

Litterfall and Nutrient Returns in Isolated Stands of <i>Terminalia catappa</i> Trees in the Rainforest Area of Southern Nigeria

Ndakara¹

2012

Ethiop. J. Env Stud & Manag

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This study assesses litter production, concentrations and returns of nutrient elements with respect to seasons, so as to provide empirical information on nutrient flux by the isolated exotic stands of Terminalia. Litterfall samples were collected from the isolated stands of Terminalia catappa and adjoining native rainforest which serves as control for the experimental research for 12 months. Data collected were analyzed in the laboratory and the results were subjected to both descriptive and inferential statistical analyses using the SPSS 15.0 version. Average litter production for the Terminalia catappa and the adjoining rainforest were 83.04 g/m²/yr and 77.31 g/m²/yr respectively. Results of the Independent Samples T-Test showed significant difference in litter production, nutrient concentrations and the returns of nutrient elements via litterfall between the two sample sites (P value). Both litter production and the return of nutrient elements varied with the seasons of the year. While Terminalia catappa stands produced the highest litter in the months with heavy rainfall, the adjoining rainforests produced the highest litter in the dry season months. The order of nutrient elements return via litterfall by Terminalia catappa stands was Ca > N > K > Mg > P > Na, while that of the adjoining rainforest was N > Ca > K > Mg > P > Na. Results of Pearson's bivariate analyses showed significant positive relationships between litter production and nutrients return through litterfall at the 5% levels, with the correlations ranging between 0.984-0.999 in Terminalia catappa stands and 0.944-0.991 in the adjoining rainforest. Therefore, the cultivation of Terminalia catappa which is an exotic tree species to this study area has implications in returning nutrient elements to the soils of the rainforest ecosystem.

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Section: Introductionmentioning

confidence: 99%

Litterfall and Nutrient Returns in Isolated Stands of <i>Terminalia catappa</i> Trees in the Rainforest Area of Southern Nigeria

Ndakara¹

2012

Ethiop. J. Env Stud & Manag

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“…In Nigeria, and elsewhere in the tropics, extensive studies have been carried out on many tree crops including cocoa (Ekanade 1985a(Ekanade , 1985b(Ekanade , 1988. Previous records on soil survey between 1951 and 1962, within the cocoa belts of Nigeria revealed that about 62% of Nigeria cocoa is grown on good or fairly good soils and the remaining thirty eight per cent on poor or very poor soil (Smyth and Montgonery, 1962).…”

Section: Introductionmentioning

confidence: 99%

A Study on Effects of Soil Physico-Chemical Properties on Cocoa Production in Ondo State

Ajayi

Ololade

Gbadamosi

et al. 2010

MAS

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Cocoa is a major export crop in Nigeria with highest percentage coming from Ondo State. However, the production has dwindled in recent years. This study has examined the impacts of soil physico-chemical properties (pH, total organic carbon (TOC), cation exchange capacity (CEC) and textural nature) of different cocoa plantations within six selected communities of Ondo State, Nigeria on cocoa productivity. Results obtained showed that soils of the various locations are not significantly different from one another in terms of chemical properties but differ with decreasing soil profile. The pH, OC and CEC obtained ranged from 5.1, 0.35 – 4.30% and 2.10 – 6.05 meq/100g respectively which tended to decrease with depth. A guided fertilizer usage has been recommended to cocoa farmers to boost the productivity of the cash crop.

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“…Bartholomew et al 1953;Nye and Greenland, 1960;Aweto, 1985;Ekanade, 1988]. These studies have shown that in general, organic matter content and the concentration of nutrients in the soil increase as the fallow progresses.…”

Section: Introductionmentioning

confidence: 99%

Organic matter and nutrient status of soils under cultivated fallows: an example of Gliricidia sepium fallows from South Western Nigeria

Adejuwon

Adesina

1990

Agroforest Syst

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This paper examines the dynamics of organic matter and nutrients under planted fallows of Gliricidia sepium in South Western Nigeria, as an investigation into the behaviour of soils under such fallows. Data on soil characteristics were collected from thirty fallow fields ranging in age from one to eight years. The data sets were described using the descriptive statistics. Furthermore, the relationships between the soil properties and the age of fallow were evaluated with simple bivariate correlation analysis. Compared with published data and trends in natural fallow, the study shows that the progress of the planted fallow leads to greater organic matter build-up and increase in nitrate-nitrogen and potassium concentration in the soil. It also shows that the biomass retain greater amount of nutrients during the fallow.

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The Nutrient Status of Soils Under Peasant Cocoa Farms of Varying Ages in Southwestern Nigeria

Cited by 19 publications

References 6 publications

Litterfall and Nutrient Returns in Isolated Stands of <i>Terminalia catappa</i> Trees in the Rainforest Area of Southern Nigeria

Litterfall and Nutrient Returns in Isolated Stands of <i>Terminalia catappa</i> Trees in the Rainforest Area of Southern Nigeria

A Study on Effects of Soil Physico-Chemical Properties on Cocoa Production in Ondo State

Organic matter and nutrient status of soils under cultivated fallows: an example of Gliricidia sepium fallows from South Western Nigeria

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