Evaluation of Heracleum sosnowskyi Manden. survivial after snow cover removing in early spring

The results of an experiment on the effect of snow cover removing on the areas occupied by Heracleum sosnowskyi stands in the early spring period. The experimental (impact) and control plots located in the Syktyvkar city suburb (Komi Republic, Russia). Most of calculation were performed in R. Find the file "FrozenHogweed_R_script.r" for calculation reproducing.