Riza, Sativandi, Soil Departement of Agriculture Faculty, Brawijaya University, Jl. Veteran No. 1, Malang, East Java Indonesia;
Rochayati, Sri, Indonesian Soil Research Institute Jl. Tentara Pelajar No 12, Bogor, Indonesia
Rohim, Abdul Madjid, Department of Soil Science Faculty of Agriculture Sriwijaya University Indralaya Campus Jalan Palembang Prabumulih Km 32
Romelah, Siti, Postgraduate Study Program of Environmental Sciences, University of Lampung Departmentof Biology, Faculty of Mathematics and Natural Sciences, University of Lampung, Jl. Sumantri Brojonegoro No. 1, Bandar Lampung, Indonesia
Rorong, Johnly Alfreds, Department of Chemistry, Faculty of Mathematical and Sciences University of Sam Ratulangi, Jl. Kampus Unsrat Kleak Manado, North Sulawesi
Rosadi, Bustomi, Agricultural Engineering Department, Lampung University, Jl Sumantri Brojonegoro No. 1 Bandarlampung 35145, INDONESIA.
Rosjidi, Mochamad, The National Research and Innovation Agency, Jakarta Pusat 10340, Indonesia
Rosniawati, Santi, Department of Agronomy, Faculty of Agriculture, Universitas Padjadjaran Jl. Raya Bandung – Sumedang, Km. 21 Jatinangor Sumedang, Indonesia
Rusastra, I Wayan, Pusat Penelitian dan Pengembangan Sosial Ekonomi, Badan Penelitian dan Pengembangan Pertanian, Departemen Pertanian
Russell, Craig, School of Earth and Geographycal Science, The University of Western Australia, Crawley 6009

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