Draft 3 for 4.22

At Harvard Forest, a soil warming experiment is being done to address how the freezing soil is affecting tree growth. They plant young, new trees and artificially warm the soil in certain plots and leave the soil alone in other plots to see how warming the soil would affect tree growth. They also adjust the fertilizer levels in all plots, so certain plots have warmed soil and no fertilizer, others have warmed soil with fertilizer, not warmed soil with fertilizer and a control. This experiment is taking place over years to address long term effects of reduced snowfall in Massachusetts and the colder soil temperatures that result from it. So far, they have seen warming the soil is affecting growth positively.