William Scrugham Lyon was an American agricultural scientist and author, recognized for his significant contributions to the study and promotion of tropical agriculture in the Philippines during the early 20th century. His works primarily focused on the cultivation of cacao and coconuts, two vital crops in the region, which were essential to the local economy and agricultural practices. Lyon's notable publications, including "Cacao Culture in the Philippines" and "The Cocoanut: With Reference to Its Products and Cultivation in the Philippines," provided practical guidance for farmers and agriculturalists, emphasizing the importance of these crops in the tropical landscape. In addition to his detailed examinations of cacao and coconut cultivation, Lyon authored "A Reader of Elementary Tropical Agriculture: Adapted to Farming in the Philippine Islands," which served as an educational resource for those interested in tropical farming techniques. His work not only contributed to the agricultural knowledge of the time but also played a role in the development of sustainable farming practices in the Philippines. Lyon's legacy lies in his dedication to enhancing agricultural productivity and his influence on the agricultural policies and practices in the region, making him a notable figure in the history of Philippine agriculture.