Ecoregions and land cover trends in Senegal

Tappan, G. Gray; Sall, M.; Wood, Eric C.; Cushing, Matthew

doi:10.1016/j.jaridenv.2004.03.018

Cited by 199 publications

(224 citation statements)

References 13 publications

(9 reference statements)

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“…Land use change and soil resources  Soil fertility in much of Senegal is dropping rapidly (approximately 418 kg/ha/yr) due to inappropriate farming practices, field burning, and erosion, and will be worsened by climate change [5,50].  In some areas soil fertility is increasing due to land abandonment [6].…”

Section: Ghg Emissions and Air Pollutionmentioning

confidence: 99%

“… Fuelwood and charcoal production, agricultural expansion (especially for peanuts), and illegal herding and overgrazing are causing deforestation and harming other forest products [2,5,11].…”

Section: Ghg Emissions and Air Pollutionmentioning

confidence: 99%

“…due to inappropriate farming practices, field burning, and erosion, and will be worsened by climate change [5,50]. As noted previously, low yields from poor fertility have encouraged farmers to abandon their fields and clear forests in order to renew farming [5]. There has already been a 40 percent drop in forest cover since 1960 and the land pressures that prevent forest regrowth are increasing due to population growth and poverty [2].…”

Section: The Soil Fertility-deforestation Nexusmentioning

confidence: 99%

“…Failure to replenish soil fertility, for example, by returning peanut shells and other plant wastes to the land, has led to soil exhaustion. Farmers then abandon their fields and clear forests in the southeast in order to renew farming [5]. Using peanut shells in cookstoves instead of for soil enhancement may therefore exacerbate soil fertility depletion and lead to deforestation.…”

mentioning

confidence: 99%

“…The overuse of wood and charcoal for cooking has worsened deforestation and desertification, and these factors coupled with overgrazing and agricultural expansion have led to an almost 50 percent reduction in forest cover since 1965 [5,6].…”

mentioning

confidence: 99%

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Sustainability Assessment of the Agricultural and Energy Systems of Senegal

Gaudreau

Gibson

2015

Energies

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Abstract:To improve decision-making, sustainability-based approaches to assessment of options and undertakings demand that we move beyond narrowly defined considerations to address the full suite of requirements for progress towards sustainability. This paper reports on a sustainability assessment exercise that originally focused on burning agricultural residues, primarily peanut shells, for cooking applications in Senegal. The scope of assessment had to be expanded to address the agricultural and energy systems of Senegal, when closer examination revealed a complex set of energy and agricultural system interactions that could undermine the anticipated positive effects of initiatives centred primarily on peanut residue cookstoves. The case highlights the need to be open to expanding the scope of assessment to address underlying and/or unexpected issues that cannot be addressed appropriately at the project scale. In particular, the case illustrates how the assessment of an energy system may serve as an entry point into a deeper exploration of the context in which the energy system is embedded. The analysis also illustrates a situation in which different paths that may be followed, each with its own degree of uncertainty, path dependence, feasibility, fairness, cultural sensitivity, trade-off acceptability and possibilities for public judgement of overall desirability. OPEN ACCESSEnergies 2015, 8 3504

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Section: Ghg Emissions and Air Pollutionmentioning

confidence: 99%

Section: Ghg Emissions and Air Pollutionmentioning

confidence: 99%

Section: The Soil Fertility-deforestation Nexusmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Sustainability Assessment of the Agricultural and Energy Systems of Senegal

Gaudreau

Gibson

2015

Energies

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Cowpea residue management effect on productivity of subsequent millet in a legume‐cereal crop rotation

Tine,

Faye,

Obour

et al. 2023

Agrosystems Geosci & Env

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Growing cowpea (Vigna unguiculate (L) Walp) in rotation with millet (Pennisetum glaucum (L.) R. Br.) can increase millet productivity through biological nitrogen fixation. However, in Senegal, legume crop residues are generally removed for livestock feed, and little information exists on how burying the residue instead of removal affects the subsequent crop yield. This study assessed the productivity of cowpea varieties and evaluated prior cowpea residue management effect on grain and biomass yield of millet (Pennisetum glaucum (L.) R. Br) in rotation. Experiments were conducted in the National Center for Agronomic Research (CNRA) of Bambey in Senegal from 2020 to 2022. Treatments include 20 cowpea varieties, two fertilizer rates, and cowpea residue management practices (residue removal vs. burying) in a split‐split plot arrangement. Results showed that fertilizer and variety had significant effect on grain and fodder yields of cowpea. Cowpea fodder nutrient concentrations differed by variety, and the superior cowpea variety, 66‐35F, in nutrient concentration in this study had a 2.8‐0.45‐0.82% N‐P‐K. Applying fertilizer to previous cowpea crop increased millet grain yield by 63% compared to millet yield following previous non‐fertilized cowpea plots. Furthermore, incorporation of cowpea residue prior to millet planting increased millet yield by 40% compared with the removal of cowpea biomass in 2020 but had no significant effect in 2021. In general, the amount of cowpea biomass buried had significant positive relationship with millet grain yield. Across years, millet grain yield increased by 0.16 kg ha−1 for each kilogram per hectare increase in cowpea biomass buried prior to millet planting. Results showed that a minimum of 1500 kg ha−1 cowpea buried biomass was required to increase the probability of millet grain yield above 1000 kg ha−1. We concluded that the previous year's cowpea residue burial and fertilizer management improved productivity of the rotational millet crop.

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Evaluating pearl millet and mungbean intercropping in the semi‐arid regions of Senegal

et al. 2020

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Pearl millet [Pennisetum glaucum (L.) R. Br.] yields in Senegal are constrained by rainfall variability, persistent drought, and low soil fertility. Mungbean [Vigna radiata (L.) Wilczek], a short-duration and relatively drought-tolerant legume crop, is capable of improving soil fertility and productivity of associated crops. Our study evaluated the effects of pearl millet and mungbean intercropping on crop yields in the semi-arid regions of Senegal. Field experiments were conducted during the 2017 and 2018 growing seasons at Bambey and Nioro sites located within Senegal's west-central and Saloum agricultural regions, respectively. Experimental treatments: monocropped millet (T 1), monocropped mungbean (T 2 , 100%), and 23% (T 3), 43% (T 4), 47% (T 5), 62% (T 6), 125% (T 7), and 164% (T 8) of mungbean intercropped with millet were laid out in a randomized complete block design and replicated four times. In addition to yield, canopy cover and normalized difference vegetation index (NDVI) were measured and yield advantage was assessed with the land equivalent ratio (LER). Combined millet and mungbean seed yields were up to 60 and 85% higher under intercropping systems compared to millet monocropping at Bambey and Nioro, respectively. Similarly, LER was always greater than unity (> 1) under millet-mungbean intercropping compared to millet monocropping. Mean canopy cover estimates and NDVI values increased by up to 60 and 30% in millet-mungbean intercropping over millet grown alone, respectively. These combined yield gains obtained without fertilizer applications suggested that optimizing mungbean density (62-125%) in pearl millet-based systems can increase the combined yields in a low-input and/or high-risk environment in Senegal.

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Ecoregions and land cover trends in Senegal

Cited by 199 publications

References 13 publications

Sustainability Assessment of the Agricultural and Energy Systems of Senegal

Sustainability Assessment of the Agricultural and Energy Systems of Senegal

Cowpea residue management effect on productivity of subsequent millet in a legume‐cereal crop rotation

Evaluating pearl millet and mungbean intercropping in the semi‐arid regions of Senegal

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