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Phosphate sorption of some Nigerian soils and its effect on cation exchange capacity by Juo, A.S.R., Maduakor, H.O.

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Effects of methods of seedbed preparation and mulching on the growth and yield of white yam (dioscorea rotundata) on an ultisol in south-east Nigeria by Maduakor, H.O., Lal, R., Opara-Nadi, O.A.

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Hydrolysis and availability of pyrophosphate in tropical soils by Juo, A.S.R., Maduakor, H.O.

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