How to cite this article
APA /
Usman, S., & Kundiri, A. M. (2016). Values of organic materials as fertilizers to northern Nigerian crop production systems. Journal of Soil Science and Environmental Management, 7(12), 204-211.
Chicago /
S. Usman and A. M. Kundiri. "Values of organic materials as fertilizers to northern Nigerian crop production systems." Journal of Soil Science and Environmental Management 7, no. 12 (2016): 204-211.
MLA /
S. Usman and A. M. Kundiri. "Values of organic materials as fertilizers to northern Nigerian crop production systems." Journal of Soil Science and Environmental Management 7.12 (2016): 204-211.