@ARTICLE {VANLAUWE:2014c, title = {A fourth principle is required to define conservation agriculture in sub-Saharan Africa: the appropriate use of fertilizer to enhance crop productivity}, author = {Vanlauwe, B. and Wendt, J. and Giller, K. and Corbeels, M. * and Gerard, B. * and Nolte, C. }, journal = {Field Crops Research}, year = {2014}, volume = {155}, pages = {10--13}, issn = {0378-4290}, note = {CAHub}, url = {http://dx.doi.org/10.1016/j.fcr.2013.10.002}, doi = {10.1016/j.fcr.2013.10.002}, }