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C.I. Duruigbo, J.C. Obiefuna and E.U. Onweremadu, 2007. Effect of Poultry Manure Rates on Soil Acidity in an Ultisol. International Journal of Soil Science, 2: 154-158.
DOI: 10.3923/ijss.2007.154.158
URL: https://scialert.net/abstract/?doi=ijss.2007.154.158
DOI: 10.3923/ijss.2007.154.158
URL: https://scialert.net/abstract/?doi=ijss.2007.154.158