Yesterday, about three inches of snow covered Vittum Hill Road and the emerging sugar maple leaves. Luckily the temperature was just at freezing. The little leaves survived. But it was quite an odd sight.
I visited Loudon sugar producers to pick up more sap samples. Marty and Anne Boisvert gave me a sample of the nitre they scraped off the sap pan at the end of the season. Usually it is a cinnamon brown. This year, the nitre was black as tar with flecks of clear crystals in it: another chemical mystery for the UNH team.