KAJIAN KEBERADAAN TEGAKAN TINGGAL DAN KETERHUKAAN LABAN. PADA KEGIATAN PENEBANGAN DAN PENYARADAN DI SUATU PERUSAHAAN HUTAN DI KALIMANTAN TENGAH (The study of residual stand condition and ground exposure caused by felling and yanling ooerations at a forest concession in central Kalimantan) - Suhartana, Sona (Pusat Penelitian dan Pengembangan Hasil Hutan, 2017)