John Meme Buck (1890–1975) was an American agricultural economist specializing in the rural economy of China. He first went to China in 1915 as an agricultural missionary for the American Presbyterian Mission and was based in China until 1944. His wife, whom he later divorced, was Nobel Prize-winning author Pearl S. Buck (1892–1973).
Buck was born in Dutchess County, New York. He graduated from Cornell University in 1914, and returned for an M.S. in 1925, and a PhD in 1933.
In 1917, Buck married Pearl Sydenstricker, who subsequently became famous under her married name Pearl S. Buck. In 1920 they had a child, Carol Grace, and in 1925 adopted Janice. In 1918, Lossing, as he was known to his friends, and Pearl went to live in Nanhsuchou, where Lossing began his research into the Chinese farm economy using sociological tools based on statistical surveys conducted in person. Pearl, who had grown up in China, accompanied him on his initial trips through the countryside to interpret and translate. In 1920, Nanking University, a Christian institution, invited Lossing to create and head a Department of Agricultural Economics. Over the next twelve years he organized his students to conduct a survey of 16,786 farms and 38,256 farm families, which he analyzed in Chinese Farm Economy (University of Chicago Press, 1930), the first footnote of which cited his wife's novel The Good Earth. Buck continued the surveys, producing a three volume study, Land Utilization in China (University of Chicago Press, 1937).
In 1932,The Good Earth won a Pulitzer Prize, but in 1935 the couple divorced. In 1941 he married Lomay Chang (1908-2012) in Chengtu, China. They had two children, Rosalind, born in China, and Paul, born in the United States.
In the following years Buck was U.S. Treasury Representative in China, Chief of the Land and Water Use Branch of FAO (United Nations) and Director for agricultural economics at the Council on Economic and Cultural Affairs. After retiring in 1957 he continued writing, giving lectures and served as a Specialist for the U.S. State Department’s Bureau of Educational and Cultural Affairs. Buck continued to published prolifically, including John Lossing Buck, Owen L. Dawson, Yuan-Li Wu, Food and Agriculture in Communist China. (New York: Praeger, London: Pall Mall, Prepared for the Hoover Institution on War. Revolution and Peace, 1966).