Obalum, Sunday E., Department of Soil Science, Faculty of Agriculture, University of Nigeria, Nsukka 410001, Enugu State,
Obi, Martin Eze, Department of Soil Science, Faculty of Agriculture, University of Nigeria, Nsukka
Ogeh, Joseph Sunday, Department of Soil Science, Faculty of Agriculture, University of Benin
Ogeh, Joseph Sunday, Department of Soil Science, Faculty of Agriculture, University of Benin, Benin City, Edo State 300001
Ogeh, Joseph Sunday, Department of Soil Science, Faculty of Agriculture, University of Benin, Benin City, Edo State, Nigeria
Ogeh, Joseph Sunday, Department of Soil Science, University of Benin, Benin-City, Nigeria
Ogunwole, Ogunlade Moses, Soil and Plant Nutrition Section, Cocoa Research Institute of Nigeria
Oklima, Ade Mariyam, Department of Soil Science and Land Resources Faculty of Agriculture, Bogor Agricultural University, Bogor
Oktafri, ., Agricultural Engineering Department, Lampung University, Jl Sumantri Brojonegoro No. 1 Bandarlampung 35145, INDONESIA.
Oktaviyani, Trias, Jendral Soedirman University
Osaki, Mitsuru, Graduate Study of Agriculture, Hokkaido University, Sapporo, Japan
Osaki, Mitsuru, Laboratory of Rhizosphere Environment Technology, Division of Bio-systems Sustainability, Graduate School of Agriculture, Kita-9, Nishi-9, Kitaku, Sapporo 060-8589, JAPAN
Osaki, Mitsuru, Laboratory of Rhizosphere Environment Technology, Division of Bio-systems Sustainability, Graduate School of Agriculture, Kita-9, Nishi-9, Kitaku, Sapporo 060-8589
Osaki, Mitsuru, National Institute for Agro-Environmental Science, Tsukuba, Ibaraki, Japan
Ottow, Carl Gottlieb, Institute for Applied Microbiology, Justus Leibig University Heinrich-Buff-Ring 26-32, 35392 Gießen
Owonubi, Ayodele, Forestry Research Institute of Nigeria, Federal College of Forestry, Jos
Oyibo, Rukeme Orakpogbake, Department of Soil Science, Faculty of Agriculture, University of Benin, Benin City, Edo State, Nigeria
Ozongwu, Ogorchukwu Valeria, Department of Soil Science, Faculty of Agriculture, University of Nigeria, Nsukka 410001, Enugu State,

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