Soil Degradation-Induced Decline in Productivity of Sub-Saharan African Soils: The Prospects of Looking Downwards the Lowlands with the Sawah Ecotechnology by Sunday E. Obalum, Mohammed M. Buri, John C. Nwite, Hermansah, Yoshinori Watanabe, Charles A. Igwe, Toshiyuki Wakatsuki

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Lime and manure application to low-fertility tropical soils enhances phosphorus bioavailability for increased agronomic productivity by Vivian U. Ugwu, Chinemerem J. Obieri, Confidence I. Osuji, Sunday E. Obalum, Benjamin A. Onuze, Charles A. Igwe

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Sensitivity of rainfed okra (Abelmoschus esculentus L. Moench) to mulch material and plant spacing in drought-prone tropical soils by Justina O. Obi, Chinaza J. Onah, Adaobi L. Nnadi, Vivian O. Osadebe, Jacinta C. Akubue, Chinedu F. Amuji, Sunday E. Obalum

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Synergistic effects of cattle dung, urea and lime on agronomic productivity and physicochemical properties of coarse-textured tropical soils by Precious I. Ameh, Ntieneobong E. Etukudo, Paul O. Joseph, Benjamin A. Onuze, Solange T. Ndzeshala, Blessing I. Isaac, Sunday E. Obalum, Kayode P. Baiyeri, Charles A. Igwe

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