Sugar maples have a sweet tooth for nitrogen
Wild, A.D., and Yanai, R.D. 2015. “Soil nutrients affects sweetness of sugar maple sap.” Forest Ecology and Management. 341: 30-36. DOI: 10.1016/j.foreco.2014.12.022
Maple sugar is the most important non-timber forest product in the northeastern U.S. A new study shows greater amounts of nitrogen in the soil can lead to sweeter sap and therefore higher maple sugar yields.