Mahfud Arifin,
Department of Soil Science, Faculty of Agriculture, Padjadjaran University,
Jl. Raya Bandung Sumedang Km 21, Jatinangor, Sumedang,
Indonesia
Rina Devnita,
Department of Soil Science, Faculty of Agriculture, Padjadjaran University,
Jl. Raya Bandung Sumedang Km 21, Jatinangor, Sumedang,
Indonesia