Geographical distribution of selected soil fertility parameters of inland valleys in West Africa

Issaka, Roland Nuhu; Ishida, Fusako; Kubota, Daisuke; Wakatsuki, Toshiyuki

doi:10.1016/s0016-7061(96)00083-3

Cited by 28 publications

(33 citation statements)

References 7 publications

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“…Soil fertility characteristics were evaluated and their fertility was compared with that of soils in tropical Asia and Japan. The results were summarized in Table 2 (Wakatsuki 1988; Wakatsuki 1997, 2002;Issaka et al 1997;Kawaguchi and Kyuma 1977;Bun et al 1999Bun et al , 2000. Total carbon and nitrogen content were low for West Africa and tropical Asia.…”

mentioning

confidence: 99%

Ecological Engineering for Sustainable Food Production and the Restoration of Degraded Watersheds in Tropics of Low pH Soils: Focus on West Africa

Wakatsuki

Masunaga

2005

Soil Science and Plant Nutrition

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confidence: 99%

Ecological Engineering for Sustainable Food Production and the Restoration of Degraded Watersheds in Tropics of Low pH Soils: Focus on West Africa

Wakatsuki

Masunaga

2005

Soil Science and Plant Nutrition

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“…The fertility parameters also show that the soils in the West African lowlands are much less fertile than those of Amazon River systems 46 . These results indicate that soil fertility of the West African lowlands is the lowest among the three major tropical regions in the world 9,22,49 . The principal reason for the poor soil characteristics in West Africa is that the major soils in that area are derived from coarse-textured and acidic parent rocks (mainly granite) and have weathered under a tropical climate over millions of years 29,48,55 .…”

Section: Study Area and Soil Samplesmentioning

confidence: 77%

“…1). The locations are spread over the given four agro-ecological zones, whereas data on the SuS and SaS zones are combined, because the number of samples collected in these two zones are limited and their data sets generally show similar mean values [see Issaka et al (1997) and Buri et al (1999;2000)] 9,10,22 . These sampling sites include both potentially reclaimable and actually cultivated soils for rice and other crops [see Issaka (1997) and Buri (1999) General fertility characteristics and soil classification 1.…”

Section: Study Area and Soil Samplesmentioning

confidence: 99%

“…In addition, the flood plain soils have higher values of exchangeable bases and Analytical procedures (IITA, 1979): pH, grass electrode method with 1:1 soil:water extraction; total C and N, dry combustion method; available P, Bray-2 method; exchangeable bases, neutral ammonium acetate extraction method; exchange acidity, titration method with 1 M KCl extraction; ECEC, summation of exchangeable bases and exchange acidity; clay content, pipette method; clay activity, division of ECEC by the clay content. See Kawaguchi & Kyuma (1977) Issaka et al (1997) and Buri et al (1999;2000) for the value range, standard deviation and/or coefficient of variance.…”

Section: Study Area and Soil Samplesmentioning

confidence: 99%

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Soil Fertility Potential for Rice Production in West African Lowlands

Abe

Buri²,

Issaka³

et al. 2010

JARQ

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In this paper, we review the soil fertility characteristics and the nature of material in the West African lowlands in comparison with paddy soils in tropical Asia to examine their potential for rice cultivation. Soil samples collected from major lowland ecosystems, i.e., inland valleys (185 locations) and flood plains (62 locations), in 13 countries (Benin, Burkina Faso, Cameroon, Cote d'Ivoire, Ghana, Guinea, Niger, Nigeria, Liberia, Mali, Senegal, Sierra Leone, and Togo) generally show low values of pH, total C and N, available (Bary-2) P, exchangeable Ca and Mg, effective cation exchange capacity (ECEC), and clay content. These properties of the 87 topsoil samples selected from 247 collected samples are well associated with mineralogical composition. The clay and primary minerals predominantly consist of kaolinite and quartz, respectively, which suggests that the lowland soils in the region have low nutrient-holding capacity and a limited potential for inherent nutrient supply. In general, soil pH, available P, exchangeable bases (Ca, Mg, K, and Na), and ECEC decrease while total C, total N and exchange acidity (Al and H) increase with increasing rainfall. This tendency is mostly explained by the enhanced biomass production and soil weathering sequence governed by the climate. In terms of rice production, the lowland soils in West Africa have lower values of general fertility parameters and poorer mineralogical characteristics compared to paddy soils in tropical Asia, which includes Bangladesh, Cambodia, India, Indonesia, Malaysia, Myanmar, Philippines, Sri Lanka, and Thailand. In addition, deficit levels of S and Zn for rice production are widely observed in the lowland soils in West Africa. These findings suggest that soil fertility characteristics show substantially less potential for rice production in West Africa than in tropical Asia.Discipline: Soils, fertilizers and plant nutrition Additional key words: agro-ecological zones, flood plains, inland valleys, mineralogical composition, sulfur and zinc deficiencyThe present paper is a joint contribution from the projects 'Development of Sustainable Rice Farming Systems in Low Activity Clay

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“…It is important to state that even though Toure et al (2009) documented the importance of toposequence in the hydrology and drainage of the inland valley ecosystems of West Africa. However, most of the available research information about soil conditions in the West African inland valleys focused mainly on fertility and/or pedo-mineralogy (Issaka et al, 1996(Issaka et al, , 1997Buri et al, 1999Buri et al, , 2000Annan-Afful et al, 2004, 2005Abe et al, 2006Abe et al, , 2007Abe et al, , 2009Udo et al, 2009). The physical aspect has been sparingly studied, with little or no emphasis on the effects of topography (Annan-Afful et al, 2004;Abe et al, 2009) Thus, the objective of the study was to examine how some selected soil physico-chemical properties varies and among landscape positions at a sawah site.…”

Section: Introductionmentioning

confidence: 99%

Relationship between landscape positions and selected soil properties at a Sawah site in Ghana

Ofori¹,

Atakora²,

Kyei‐Baffour³

et al. 2013

Afr. J. Agric. Res.

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A study was conducted at a sawah site in Ghana to examine the relationship between landscape position and some selected soil properties with the aim of generating adequate data for modeling landscape relationships and to aid both researchers and farmers in taking critical management decisions. Soil properties namely total porosity, moisture content, infiltration rates, hydraulic conductivity, sand content, silt content, clay content, gravel concentration, bulk density, soil pH, total nitrogen, soil organic matter and cation exchange capacity were collected and analysed. Data were collected at the foot slopes, middle slopes and at the upper slopes from four major landuses (maize, oil palm, natural vegetation and plantain) in the study area. Simple statistical parameters such as mean and standard deviation were used to analyse the data. Moisture content, total porosity, soil pH, organic matter and carbon and total nitrogen increased downslope whilst sand content, clay content, bulk density occurred at upper slopes decreased downslope. Management practices appeared to have influenced infiltration rate, hydraulic conductivity and silt content.

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Geographical distribution of selected soil fertility parameters of inland valleys in West Africa

Cited by 28 publications

References 7 publications

Ecological Engineering for Sustainable Food Production and the Restoration of Degraded Watersheds in Tropics of Low pH Soils: Focus on West Africa

Ecological Engineering for Sustainable Food Production and the Restoration of Degraded Watersheds in Tropics of Low pH Soils: Focus on West Africa

Soil Fertility Potential for Rice Production in West African Lowlands

Relationship between landscape positions and selected soil properties at a Sawah site in Ghana

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