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- 저자 : ( Mustapha Atta ) (검색결과 2 건)
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( Afiq Farhan Abdul Rahim ),( Abd Rasid Jaapar ),( Muhammad Farid Mohamed Dali ),( Mustapha Atta ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
Hilly areas to the east and north of Kuala Lumpur are known to be prone to landslide incidents as recorded in numerous historical cases involving life and property loss. Most historical incidence have been attributed to lack of proper planning and investigations, especially in terms of geology, engineering geology and geomorphological aspects. Therefore, this study aims to set up a good practice example in comprehensive engineering geological assessment - in this case, for a proposed urban highway at eastern Kuala Lumpur - along an engineering geologically challenging terrain. This study consists of the following components; terrain mapping (geomorphological study) and geohazards assessments along highway alignment to identify potential geotechnically challenging section, and geophysical survey with engineering geological assessment on specific identified sections to identify specific engineering geological issues. Lithology, structural geology and weathering profile are among factors identified contributing to issues in the study area which will affect construction and post-construction activities of the highway. The engineering geological assessment and model output from this study will be utilized for subsequent geotechnical works and stabilization design, which would address the challenges and any potential landslide in the region.
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Akpertey Abraham,Anim-Kwapong Esther,Adu-Gyamfi Paul Kwasi Krah,Dadzie Abu Mustapha,Nyadanu Daniel,Ofori Atta 한국작물학회 2023 Journal of crop science and biotechnology Vol.26 No.2
Agronomic performance of Robusta cofee (Cofea canephora) is afected by genotype by environment interaction, which demands multi-environment testing of genotypes to identify superior genotypes. The objectives of this study were to (1) estimate genetic parameters and analyze the efects of genotype (G), environment (E), and genotype by environment (G×E) interaction on growth and yield traits of C. canephora genotypes, (2) identify superior genotypes that exhibit high stability by combining high growth and yield with broad or specifc environmental adaptation, and (3) identify environments that best represent the target environment for high trait expression. Thirty-nine C. canephora hybrids were evaluated using a randomized-complete-block design with three replications at New Tafo-Akim and Bechem in the Eastern and Ahafo regions of Ghana, respectively. Additive main efect and multiplicative interaction (AMMI) analysis of variance revealed highly signifcant (p<0.001) diferences among G, E, and G×E interaction efects for all traits. AMMI2 biplot analysis revealed the presence of 3, 2, 3, 2, and 3 mega environments for trunk cross-sectional area, height, span, number of laterals, and yield, respectively. Identifying mega environments for these traits will help expedite Robusta cofee breeding through the reduction of the number of test environments needed for phenotype evaluations. The AMMI analyses indicated genotypes G17 (E138×C180), G35 (PA193×C180), G4 (197×PA413), G1 (149×C193) and G30 (E152×149) have high and stable yields across all test environments. The promising candidate genotypes are recommended for further stability tests and release in Ghana or comparable environments.
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