How to cite this article:
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
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