The Estimation of Forest Stand Above Ground Biomass in the district of Borobudur, Central Java, Indonesia by Munawaroh, Munawaroh, Salsabila, Huwaida Nur, Yogyanti, Galih Citra, Astuti, Nurul, Widayani, Prima, Danoedoro, Projo, Murti, Sigit Heru, Wicaksono, Pramaditya