Science Development

Volume 4, Issue 1, March 2023

  • Characterization and Carbon Sequestration Potential of Sahelian Agroforestry Parklands of Chad

    Dodorom Teble Wolwaï, Fawa Guidawa, Hamawa Yougouda, Oumarou Haman Zephirin, Dangai Youhana, Ibrahima Adamou, Mapongmetsem Pierre Marie

    Issue: Volume 4, Issue 1, March 2023
    Pages: 1-11
    Received: 22 December 2022
    Accepted: 20 January 2023
    Published: 16 February 2023
    Abstract: Agroforestry parklands are agroforestry systems which farmers created by preserving useful species on their farms. These species are those whose flowers, fruits, seeds, barks or leaves can be processed into useful products. Parklands are thus the result of human intervention in natural vegetation dynamics and their diversity results from ecological... Show More
  • Tax Reform and Tax Revenue Collection Performance in Ethiopia (From 2005 to 2013 EFY)

    Moges Mengstu Kassaw

    Issue: Volume 4, Issue 1, March 2023
    Pages: 12-19
    Received: 10 November 2022
    Accepted: 31 January 2023
    Published: 21 February 2023
    Abstract: The objective of this study was to evaluate the effects of tax policy reforms on revenue generation in Ethiopia, using different tax revenue sources as a proxy for the federally collected tax revenue. To carry out this exercise, quarterly time-series data for the years (2005 - 2013 EFY) was employed. Data were gathered from both primary and seconda... Show More