Geography- Scholarly Publications

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Browsing Geography- Scholarly Publications by Subject "Agriculture"

Now showing 1 - 3 of 3
  • Item
    Open Access
    Drivers of Deforestation and Land-Use Change in Southwest Nigeria.
    (SPRINGER NATURE SWITZERLAND AG, 2020) Fasona, M.J; Adeonipekun, P.A; Agboola, O.O; Akintuyi, A.O; Bello, A.A; Ogundipe, O.T; Soneye, A.S; Omojola, A.S
    Land based mitigation presents viable mechanism for offsetting carbon deficits from land-use change driven emissions especially in areas with relatively large lowland forests. This piece reviews key issues about the drivers of land-use change, deforestation and forest degradation. It also presented a case assessment of perception on drivers of land-use change and deforestation using rapid appraisal data collected from 108 households and 57 forest resource users in 17 purposively selected peri-urban and rural communities in the forest zone of Southwest Nigeria. From the appraisal, lumbering and polewood extraction, fuelwood and charcoal production, crop cultivation, urban growth, animal grazing and transportation remain important proximate land-use change, deforestation and forest degradation drivers. Population increase and poverty are considered the most important underlying drivers. Response to economic opportunities with regards to cash (tree) and commercial arable crops, and high local and export demands for wood substantially drive land-use change and deforestation. National climate change actions, natural resource policies, land tenure, international multilateral commitments and carbon credit frameworks have very little impacts with regards to land-use change in southwest Nigeria. Lack of alternative livelihoods undermines people’s resilience and further drive deforestation and forest degradation.
  • Item
    Open Access
    Rainfall variabilities in Sub-Sahara Africa: Observations and implications in Ilorin, Southwest Nigeria
    (Peter Lang GmbH, 2014) Ayeni, A.O.
    This paper examines the effects of global climate change on annual rainfall intensity in Ilorin, Southwest Nigeria. Rainfall data of 60 years (1946-2006) were collected and analysed. Arithmetic mean and trend analysis were employed to generate monthly mean from the daily readings to determine the long-term dispersion scenario observed from the rainfall data over the years. The result shows that the start, annual intensity and end of rainfall over Ilorin did not differ while the length and amount of the rain shows variation over the area. The rain starts as between 7th March and 4th April. It was also observed that the end of rain had a late retreat in the 1940s, 1950s and 1960s, while 1970s, 1980s, 1990s and 2000s experienced early retreat of rainfall. It can, therefore, be concluded that the start, end and amount of rain experienced little variation, but the length of rain exhibited variation and this could influence the use of the rain for agriculture and for other purposes.
  • Item
    Open Access
    Spatio-Temporal Analysis of the Rainfall Variability in the Derived Savannah Region of Nigeria, 1941 – 2010
    (Scholedge Publishing, 2020) Akintuyi, A.O.; Ayeni, A.O.; Fasona, M.J.; Soneye, A.S.O.
    Studies have revealed evidence of rainfall variability and change in both trend and spatial patterns. Basic understanding of the long-term trend and spatial variation of rainfall distribution over a place for some periods of time would provide significant insight to the management and sustainable development of agriculture and other natural resources especially in a delicate environment like derived savannah. This study evaluates the spatial and temporal variability patterns of rainfall in the Derived Savannah region of Nigeria for the period between 1941 and 2010. The monthly rainfall data were acquired from the Nigerian Meteorological Services for six stations within and around the study area for the period. The data were standardized using a combination of standard deviation and mean, percentages of the coefficient of variation and temporal variability index were determined for each of the stations, which were interpolated using IDW techniques to generate surface maps so as to reveal the spatial and temporal patterns of rainfall. The study revealed that the mean annual rainfall increases at the rate of 1.20mm annually with a long term mean of 1,316mm and increasing in a north to south direction spatially. While the annual rainfall Coefficient of Variation (CV) varies between 8% and 38% and temporal variability indices range from -2.00 to 2.38 (i.e. from severely dry to extremely wet). The study shows there is a shift in Spatio-temporal distribution, pattern and trend due increased wetness and dryness in south and north respectively, there is a need for more climatic research in order to adopt appropriate adaptation and mitigation strategies.