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Joseph Kimutai Langat 2018. Photosynthetically Active Radiation to Total Solar Radiation Top Canopy Ratio in Tea (Camellia sinensis [L.] O. Kuntze) Genotypes in the Kenyan Highlands. International Journal of Advances in Scientific Research and Engineering (IJASRE), ISSN:2454-8006, DOI: 10.31695/IJASRE. 4, 5 (May 2018), 118–128. DOI:https://doi.org/10.31695/IJASRE.2018.32726.