Intégration horticulture ‑ élevage dans les systèmes agricoles urbains de la zone des Niayes (Sénégal)

Fall, Safietou T.; Fall, Abdou Salam; Cissé, Ibrahima; Badiane, Aminata; Fall, Cheikh Alassane; Diao, Maty Ba

doi:10.4000/apad.444

Cited by 5 publications

(5 citation statements)

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“…However, excessive and often inappropriate use of fertilizer and inorganic pesticides contaminates crops, soils, and groundwater and causes health problems for farmers, unless adequate protective gear is worn, and for consumers. (51,(54)(55)(56)(57)(58)(59)(60)(61)(62)(63)(64)(65)(66).…”

Section: Peri-urban Agriculture and The Environmentmentioning

confidence: 99%

Urban Environments: Issues on the Peri-Urban Fringe

Simon

2008

Annu. Rev. Environ. Resour.

333

163

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This chapter reviews current thinking about environment-development issues in the transitional zones between distinctly urban and unambiguously rural areas, known variously as rural-urban fringes/transition zones, or peri-urban zones/areas or interfaces (PUI). Such concerns reflect the growing real-world limitations of traditional concepts of a simple rural-urban dichotomy. Moreover, recent archaeological research suggests that these phenomena may have ancient antecedents. Present-day fringes/interfaces have become intimately bound up with notions of (more) sustainable urbanization and urban development, with different issues and agendas manifested in different geohistorical zones of urbanization. Following an overview of planning issues in (post)industrial societies, the chapter addresses the complexities of changing peri-urban production and livelihood systems in the context of rapid urbanization in poorer countries, distinctive peri-urban challenges of appropriate and flexible planning and development, and the future prospects for enhanced sustainability in this most challenging category of development-environment interfaces. Possibilities for mutual learning between geohistorical regions are also raised.

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Section: Peri-urban Agriculture and The Environmentmentioning

confidence: 99%

Urban Environments: Issues on the Peri-Urban Fringe

Simon

2008

Annu. Rev. Environ. Resour.

333

163

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“…As a result, P and K concentrations in manure and compost are rarely above respectively 0.2 and 0.6%, in SSA (Blanchard et al, 2014; Fall et al, 2000; Zingore et al, 2008). This means that manure inputs of respectively 8 and 14 t/ha would be required to sustain a maize yield of 6.5 t/ha, corresponding to P and K uptake demands of 16 kg P ha −1 and 83 kg K ha −1 .…”

Section: Phosphorus and Potassium Need To Be Imported And Replaced Co...mentioning

confidence: 99%

The input reduction principle of agroecology is wrong when it comes to mineral fertilizer use in sub-Saharan Africa

Falconnier,

Cardinael,

Corbeels

et al. 2023

Outlook Agric

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Can farmers in sub-Saharan Africa (SSA) boost crop yields and improve food availability without using more mineral fertilizer? This question has been at the center of lively debates among the civil society, policy-makers, and in academic editorials. Proponents of the “yes” answer have put forward the “input reduction” principle of agroecology, i.e. by relying on agrobiodiversity, recycling and better efficiency, agroecological practices such as the use of legumes and manure can increase crop productivity without the need for more mineral fertilizer. We reviewed decades of scientific literature on nutrient balances in SSA, biological nitrogen fixation of tropical legumes, manure production and use in smallholder farming systems, and the environmental impact of mineral fertilizer. Our analyses show that more mineral fertilizer is needed in SSA for five reasons: (i) the starting point in SSA is that agricultural production is “agroecological” by default, that is, very low mineral fertilizer use, widespread mixed crop-livestock systems and large crop diversity including legumes, but leading to poor soil fertility as a result of widespread soil nutrient mining, (ii) the nitrogen needs of crops cannot be adequately met solely through biological nitrogen fixation by legumes and recycling of animal manure, (iii) other nutrients like phosphorus and potassium need to be replaced continuously, (iv) mineral fertilizers, if used appropriately, cause little harm to the environment, and (v) reducing the use of mineral fertilizers would hamper productivity gains and contribute indirectly to agricultural expansion and to deforestation. Yet, the agroecological principles directly related to soil fertility—recycling, efficiency, diversity—remain key in improving soil health and nutrient-use efficiency, and are critical to sustaining crop productivity in the long run. We argue for a nuanced position that acknowledges the critical need for more mineral fertilizers in SSA, in combination with the use of agroecological practices and adequate policy support.

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Section: Application Of the Odsis Tool In The Niayes Area In Senegal ...mentioning

confidence: 99%

“…This area is located in the Gandiolais region, at the southern end of the Senegal Delta (Figure 3). It is an integral part of the Niayes area, a coastal fringe, which extends from Dakar to Saint-Louis over a length of 180 km, with a width varying from 5 to 30 km [23]. The Nguethiouro area is geographically localized between 16°28′30″ and 16°24′05″ W and 15°50′20″ and 15°56′10″ N, with Sahelian climate.…”

Section: Study Areamentioning

confidence: 99%

Decision Support Tool for the Optimal Sizing of Solar Irrigation Systems

et al. 2023

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Solar photovoltaic (PV) irrigation is increasingly used in agriculture, driven by its low operation cost and virtually zero emissions, providing electricity access in rural areas. However, the high investment cost requires an optimal design. The objective of this work was to develop a user-friendly tool to optimally size a PV generator that satisfies crop irrigation needs under local constrictions. The ODSIS (Optimal Design of Solar Irrigation System) tool, was organized in three calculation modules, preceded by two complements, which determine the daily crop irrigation needs and power demand of the pumping system. Then, the first module sizes the PV plant, considering a multiplication factor, and provides the PV production potential throughout each day of the season. The second and third modules evaluate the total investment cost and equivalent greenhouse gas emissions avoided by comparison with traditional energy sources. This tool was applied to a case study in Senegal for which a multiplication factor of 1.4 was obtained for the optimal PV plant size. Between 22% to 64% of the investment cost corresponded to the PV pumping system, depending on the irrigation technique. The use of PV energy in the case study would represent an annual economic saving for the farmer after 5 to 8 years of payback period, avoiding the emission of between 29.8 and 37.9 tCO2eq/year for the case study area.

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Intégration horticulture ‑ élevage dans les systèmes agricoles urbains de la zone des Niayes (Sénégal)

Abstract: Les intéractions rural-urbain : circulation et mobilisation des ressources Intégration horticulture-élevage dans les systèmes agricoles urbains de la zone des Niayes (Sénégal)

Cited by 5 publications

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Urban Environments: Issues on the Peri-Urban Fringe

Urban Environments: Issues on the Peri-Urban Fringe

The input reduction principle of agroecology is wrong when it comes to mineral fertilizer use in sub-Saharan Africa

Decision Support Tool for the Optimal Sizing of Solar Irrigation Systems

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