Climate change and its effect on grain crops yields in the middle belt in Nigeria

Mijinyawa, Y.; Akpenpuun, Timothy Denen

doi:10.5897/ajest2015.1896

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…The stepwise regression is an approach to selecting a subset of effects for a regression model. This approach has been widely used in literature, with several authors preferring its application where little theory to guide the selection of terms for a model exists; or where there is the focus on predictors which interactively seem to provide a good fit; and where the performance of a model is to be improved by reducing the variance from unnecessary terms 42 – 46 . The stepwise regression also exempts variables of high multicollinearity (variance inflation factor—VIF) in the selection of the most relevant predictors, hence its adoption in this study.…”

Section: Methodsmentioning

confidence: 99%

Predictors of drought-induced crop yield/losses in two agroecologies of southern Tigray, Northern Ethiopia

Eze

Girma

Zenebe

et al. 2022

Sci Rep

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The consequences of prolonged precipitation-deficient periods are primarily substantial water deficit. The spatial characteristics of drylands and various socioeconomic factors worsen droughts’ impacts and deepen poverty among agrarian communities, with attendant food security (stability dimension) implications. This study utilizes a combination of climate, remote sensing and field survey data to obtain first-hand information on the impacts of recent (2015 and 2017) droughts on crop yield in southern Tigray, northern Ethiopia. Annual and seasonal rainfall, annual and seasonal Normalized Difference Vegetation Index (NDVI) and Deviation of NDVI (Dev-NDVI), and monthly Standardized Precipitation Index (SPI) (SPI-1, SPI-3 and SPI-12) for June to October, were considered as likely factors that could relate with yield and yield loss in the area. Correlation and multiple linear stepwise regression statistical techniques were used to determine drought-yield relationships, and identify more accurate predictors of yield and yield losses in each of the drought years. The area witnessed a more widespread precipitation deficit in 2015 than in 2017, where the lowland area recorded entire crop (sorghum) losses. Also, droughts manifested spatiotemporal variations and impacts across the two different agroecologies—primarily reduction in vegetation amounts, coinciding with the planting and maturing stages of barley and sorghum. Crop failures, therefore, translated to food shortages and reduced income of smallholder farmers, which denotes food insecurity in the time of droughts. Seasonal rainfall and June Dev-NDVI predicted 66.9% of 2015 barley and sorghum yield-loss, while NDVI predicted 2017 sorghum yield by 96%. Spate irrigation should be further popularized in the low-lying areas of Raya Azebo to augment for future deficiencies in the kiremt rainfall.

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Section: Methodsmentioning

confidence: 99%

Predictors of drought-induced crop yield/losses in two agroecologies of southern Tigray, Northern Ethiopia

Eze

Girma

Zenebe

et al. 2022

Sci Rep

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Local climate variability and crop production in the central highlands of Ethiopia

Alemayehu

Bewket

2016

Environmental Development

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Systematic review of climate change impact research in Nigeria: implication for sustainable development

Okon

Falana

Solaja

et al. 2021

Heliyon

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There is evidence that Nigeria is already experiencing environmental challenges attributed to climate change (CC) and its impacts. This has clearly highlighted the need for knowledge-based strategies to help plan adequate mitigation and adaptation measures for the country. One of the basic requirements to ensure such strategies is the development of a database of national CC research. This will aid in the assessment of past and present scientific publications from which directions for future study can be mapped. The present study used standard, systematic, and bibliographic literature reviews to analyse the trend, focus, spatial variability, and effectiveness of published research on CC impacts in Nigeria. Four thematic areas of CC impact research were defined: Agriculture, Environment, Human and Multi-disciplinary study. A total of 701 articles were found to be relevant and the review shows that CC impacts and adaptations in the literature vary across research categories and locations. The period between 2011 (68 studies) and 2015 (80 studies) showed a tremendous rise in CC impact research with a peak in 2014 (84 studies). Studies in the agriculture category had the highest publications in 23 States of Nigeria. The review revealed three research gaps: (1) lack of research that investigated the magnitude of present and potential future impacts in the aquatic environment (2) little attention on CC impacts and adaptation in the Northern regions of Nigeria (3) absence of study investigating the effects of multiple variables of CC at the same time. The findings suggest that it would be useful to advance CC research in Nigeria beyond perceptive approaches to more quantitative ones. This is particularly important for highly vulnerable animals, crops, locations, and for better planning of adaptation strategies.

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Climate change and its effect on grain crops yields in the middle belt in Nigeria

Cited by 3 publications

References 2 publications

Predictors of drought-induced crop yield/losses in two agroecologies of southern Tigray, Northern Ethiopia

Predictors of drought-induced crop yield/losses in two agroecologies of southern Tigray, Northern Ethiopia

Local climate variability and crop production in the central highlands of Ethiopia

Systematic review of climate change impact research in Nigeria: implication for sustainable development

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