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These terms define your current search. Click the × to remove a term. Economics, Business and Industry: products and commodities > agricultural products > plant products > syrups > maple syrup × 15 items, grouped by Geographical Locations (view ungrouped items) North America (3)    (Click to View) Implications of twenty-first century climate change on Northeastern United States maple syrup production: impacts and adaptations Climatic change (Click to View) Estimating the maple syrup production potential of American forests: an enhanced estimate that accounts for density and accessibility of tappable maple trees Agroforestry systems (Click to View) Stem girdling manipulates leaf sugar concentrations and anthocyanin expression in sugar maple trees during autumn Tree physiology