@INBOOK {KWARI:2011,
title = {Soil fertility variability in relation to the yields of maize and soybean under intensifying cropping systems in the tropical savannas of northeastern Nigeria},
author = {Kwari, J. * and Kamara, A. and Ekeleme, F. * and Omoigui, L. *},
editor = {Bationo, A. * and Waswa, B. and Okeyo, J. M. and Maina, F. W. and Kihara, J. },
year = {2011},
month = {November},
volume = {1},
pages = {457--464},
chapter = {1 Part II},
publisher = {Springer},
address = {Netherlands},
isbn = {978-90-481-2541-8},
note = {In: Innovations as key to the green revolution in Africa: exploring the scientific facts},
doi = {10.1007/978-90-481-2543-2_47},
}