@ARTICLE {CHUKWU:2010, title = {Improving soil information in Nigeria: kriging soil acidity in south eastern Nigeria}, author = {Chukwu, G. O. * and Ezenwa, M. I. * and Asiedu, R. and Osunde, A. O. *}, journal = {The Nigerian Agricultural Journal}, year = {2010}, volume = {41}, number = {2}, pages = {137--143}, issn = {0300-368X}, }