In recent times, since dried grass was an important manure for paddy cultivation, in order to secure the necessary amount of dried grass, sometimes a small-scale Kusayama was prepared and kept free from being re-forested.
近世の水田耕作では枯れ草が重要な肥料であった為、村に必要な枯れ草を賄う為に草山が設定され、樹木を生やさないように管理されていた。