Agricultural intensification in the Sahel – The ladder approach

Aune, Jens B.; Bationo, A.

doi:10.1016/j.agsy.2008.05.002

Cited by 106 publications

(103 citation statements)

References 31 publications

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“…Les données collectées ont été soumises à une analyse de variance (ANOVA) en utilisant le LSD (plus petite différence significative) pour comparer les moyennes des différents traitements au seuil de 5%. Aune et Bationo (2008), la performance de la microdose s'expliquerait par le fait que la localisation des engrais dans l'horizon superficiel colonisé par les racines des plants engendre leur prolifération et leur croissance ; ceci permet aux plantes de mieux capter les nutriments et l'eau. Nos résultats sont en accord avec ceux obtenus dans la même zone par Agbé (2007), Taonda et al (2008), et Saba (2011.…”

Section: Analyses Statistiquesunclassified

“…De nombreuses études ont mis en évidence le rôle positif de la microdose dans la réduction des pertes diverses des nutriments (Demers, 2008), l'amélioration de l'efficience d'utilisation des nutriments par sa concentration au niveau du système racinaire (Tabo et al, 2006(Tabo et al, et 2007Palé et al, 2009). Cela se traduit par une croissance rapide des racines et des plantes (Tabo et al,2005 ;2006 ;Aune et Bationo, 2008 ;Saba, 2011) l'amélioration des rendements (Tabo et al, 2007 ;Hayashi et al, 2008 ;Taonda et al, 2008 ;Palé et al, 2009 ;Bagayoko et al, 2011 ;Saba, 2011 ;Traore et al, 2012;Ibrahim et al, 2015 ;Somda et al, 2017) et du revenu de producteurs (Tabo et al, 2007 ;Taonda et al, 2008 ;Saba, 2011 ;Traoré, 2013). Ces auteurs ont rapporté des augmentations de plus de 50% au Burkina Faso, au Mali et au Niger.…”

Section: Introductionunclassified

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Effets de la microdose sur la production du niébé, du mil et du sorgho en fonction la toposéquence

Saba¹,

Taonda²,

Sermé³

et al. 2018

Int. J. Bio. Chem. Sci

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RESUMELa baisse de la fertilité des sols agit fortement sur la productivité des cultures et par conséquent, le revenu des agriculteurs. L'utilisation des engrais minéraux permet d'améliorer la productivité des sols mais son accès reste limité aux petits producteurs. L'objectif de la présente étude est d'évaluer l'efficacité agronomique et économique de la microdose selon la toposéquence. Des tests ont été implantés suivant la toposéquence pendant deux ans et des enquêtes ont été menées auprès des ménages pour évaluer la rentabilité de la technologie. Effects of fertilizer microdosing on cowpea, millet and sorghum production as a function of the toposequence ABSTRACT The decline in soil fertility has a strong effect on crop productivity and, consequently, on farmers' incomes. The use of mineral fertilizers improves soil productivity, but access is limited to small-scale producers. The objective of this study was to evaluate the agronomic and economic efficiency of the microdose according to the toposequence. Tests were carried out following the toposequence during two cropping seasons and household surveys were conducted to assess the cost-effectiveness of the technology. NPK (14-23-14) fertilizer was applied on cowpea and sorghum at a rate of 2 g / pit and 3 g /pit for millet pocket (62.5 kg/ha). Urea was applied only on sorghum and millet respectively at a rate of 1 g/pit (31.25 kg/ha) and 1.5 g/pit (46.88 kg/ha). These treatments were compared with the recommended fertilizer rate and an absolute control. Microdose increased grain yields by 143%, 134%, and 155% respectively for sorghum, millet and cowpea compared with the control. Microdose was economically more profitable than the recommended fertilizer rate.

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Section: Analyses Statistiquesunclassified

Section: Introductionunclassified

Effets de la microdose sur la production du niébé, du mil et du sorgho en fonction la toposéquence

Saba¹,

Taonda²,

Sermé³

et al. 2018

Int. J. Bio. Chem. Sci

View full text Add to dashboard Cite

show abstract

“…Fertilizer use is low in the Sahel because of high fertilizer costs and limited access as a result of poor infrastructure and a weak private crop input sector (Abdoulaye and Sanders 2005). Because of high fertilizer costs and uncertainty about production potential, it is often too risky for farmers to invest in applying the recommended rates of fertilizer to optimize yield (Aune and Bationo 2008). Fertilizer microdosing, which is the application of about half the recommended rate of fertilizer near the seedling within 10 days of sowing (Twomlow et al 2008), has potential to ease smallholder fertilizer use constraints in the Sahel.…”

Section: Introductionmentioning

confidence: 99%

“…There is some concern that microdosing may not be sustainable over the long term due to eventual soil nutrient depletion, especially without joint application of organic matter or return of crop residues (Aune and Bationo 2008;Twomlow et al 2008). Alternatively, researchers have suggested that microdosing may lead to improved long-term soil productivity compared to unfertilized soil because of increased crop residue inputs and thus soil organic carbon (SOC) (Aune and Bationo 2008;Bagayoko et al 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Alternatively, researchers have suggested that microdosing may lead to improved long-term soil productivity compared to unfertilized soil because of increased crop residue inputs and thus soil organic carbon (SOC) (Aune and Bationo 2008;Bagayoko et al 2011). Long-term research is essential to assess microdosing as a sustainable soil fertility management, but the effect of microdosing on nutrient cycling and soil organic matter (SOC) composition has not yet been studied.…”

Section: Introductionmentioning

confidence: 99%

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Long term effects of reduced fertilizer rates on millet yields and soil properties in the West-African Sahel

Adams

Gillespie

Kar

et al. 2016

Nutr Cycl Agroecosyst

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Microdosing, the point-source application of a reduced fertilizer rate within 10 days of sowing, has increased short-term crop yields across the Sahel and is being actively scaled up as an agronomic practice. However, there is no information on the longterm effects of the technique upon soil fertility. To rectify this, this study used soil samples from the International Crop Research Institute for the SemiArid Tropics in Sadore, Niger, to assess the effects of 16 years of a reduced fertilizer rate of 15 kg N and 4.4 kg P ha -1 compared to unfertilized soil and a recommended rate of 30 kg N and 13.2 kg P ha -1 upon millet yield trend, soil chemical properties, and soil organic matter quality. The interaction of fertilizer with crop residue and manure amendments at 300, 900, and 2700 kg ha -1 was also assessed. Compared to unfertilized soil, the reduced fertilizer rate improved yield by 116 % but did not increase total N or available P. The recommended rate doubled available P and increased total N by 27 %, but resulted in slightly lower pH compared to the reduced rate. Yield trends were negative for both fertilizer treatments, indicating mineral fertilizer alone is not sustainable at Sadore. Crop residue or manure addition at 2700 kg ha -1 with fertilizer did not improve SOC but buffered pH by 0.3 units, provided nutrients beyond N and P, and changed the forms C and N functional groups in soil organic matter.

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Factors driving cereal response to fertilizer microdosing in sub‐Saharan Africa: A meta‐analysis

et al. 2020

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Fertilizer microdosing (FM) is being promoted in sub‐Saharan Africa (SSA) to boost crop productivity on smallholder farms. However, yield response variability is a barrier to adoption. We conducted a meta‐analysis to analyze the variability in cereal crop yield response to FM and to determine the main factors associated with this variability. Thirty publications pertaining to millet [Pennisetum glaucum (L.) R. Br.], sorghum (Sorghum bicolor L. Moench) or maize (Zea mays L.) were assessed. Factors analyzed were crop type, rainfall, soil texture, type and rate of fertilizer, and complementary practices. On average, FM improved millet, sorghum and maize crop yields by 68%. Yield response tended to increase with increasing rainfall and the largest yield gains were observed in medium‐textured soils (81%), as compared to light (61%) and heavy‐textured soils (30%). The combined application of N and P performed better than either element alone. Crop response tended to increase with increasing rates of N. In the case of P, this was true only on light textured‐soils. On medium‐textured soils, the response appeared independent of the rate of P. There was a synergetic effect of water conservation measures on the performance of FM, while combining FM with organic matter (OM) amendments decreased its performance. Results highlighted major trends in cereal crop response to FM that could be used to prioritize target areas. However, these may require additional, site‐specific field experiments, especially for factors for which little data is currently available.

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Agricultural intensification in the Sahel – The ladder approach

Cited by 106 publications

References 31 publications

Effets de la microdose sur la production du niébé, du mil et du sorgho en fonction la toposéquence

Effets de la microdose sur la production du niébé, du mil et du sorgho en fonction la toposéquence

Long term effects of reduced fertilizer rates on millet yields and soil properties in the West-African Sahel

Factors driving cereal response to fertilizer microdosing in sub‐Saharan Africa: A meta‐analysis

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