Long-term effect of cassava cultivation on soil productivity von Howeler, R.H.

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Nutrient uptake and soil erosion losses in cassava and six other crops in a Psamment in eastern Thailand von Putthacharoen, S, Howeler, R.H, Jantawat, S, Vichukit, V

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Tillage systems for root and tuber crops in the tropics von Howeler, R.H., Ezumah, H.C., Midmore, D.J.

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Accumulation and distribution of dry matter and nutrients during a 12-month growth cycle of cassava von Howeler, R.H., Cadavid, L.F.

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Practical aspects of mycorrhizal technology in some tropical crops and pastures von HOWELER, R.H., SIEVERDING, E., SAIF, S.

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Short-and long-term fertility trials in Colombia to determine the nutrient requirements of cassava von Howeler, R. H., Cadavid, L. F.

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Establishment of an effective endomycorrhizal association on cassava in flowing solution culture and its effects on phosphorus nutrition von Howeler, R.H, Asher, C.J, Edwards, D.G

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