Nguyen Thi Hong Tho Department of Soil Science and Natural Resources, Faculty of Agriculture, Universitas Andalas, Padang, West Sumatra, Indonesia. Indonesia
Agustian Agustian Department of Soil Science and Natural Resources, Faculty of Agriculture, Universitas Andalas, Padang, West Sumatra, Indonesia.
Hermansah Hermansah Department of Soil Science and Natural Resources, Faculty of Agriculture, Universitas Andalas, Padang, West Sumatra, Indonesia.