measuring the circumference of teak tree trunks, tectona grandis, using hands

adult biology botanical circle circumference conservation control deforestation ecological ecology ecosystem environment environmental environmentalist equal forest forester forestry grandis growth gunung hand hands indonesia industry inspecting inspection inspector kidul learning male man measure measurement measuring men nature occupation opportunity outdoors person ranger research rural scene science scientist standing survey tape teak tectona timber timberland tree trunk trunks woodland work working yogyakarta