One of the great mysteries of maple syrup is what causes the sap to flow out of the trees
. Following is an explanation of how temperature fluctuations and pressure and suction in the tree cause sa READ MORE http://maple.dnr.cornell.edu/produc/sapflow.htm
Some trees yield a sugar-rich sap which can be drunk raw, fermented into alcoholic beverages or gently boiled down to syrup (10 litres sap makes approx. 1 litre syrup). The most copious flow is approx READ MORE http://www.judyofthewoods.net/forage/tree_sap.html