calc_degraded_forest_grade
                        Calculating degraded forest grade
class.plot              Calculate the site classes based on stand
                        height growth
degraded_forest_preprocess
                        Preprocess the degraded forest data
forestData              Mixed birch-broadleaf forest data
plot.forestData         ForestData Plot
plot_1                  1st period sample plot survey data
plot_2                  2nd period sample plot survey data
plot_3                  3rd period sample plot survey data
potential.productivity
                        Calculate the potential productivity.
realized.productivity   Calculate the realized productivity.
summary.forestData      Summary of forestData
tree_1                  1st period trees survey data
tree_2                  2nd period trees survey data
tree_3                  3rd period trees survey data
