@article{e53be9b4e23c4ad982a7ad6985bee02b,
title = "Fertilizer use should not be a fourth principle to define conservation. Response to the opinion paper of Vanlauwe et al. (2014)",
keywords = "zea-mays l., soil quality, residue management, southern africa, ecological intensification, water relations, systems, maize, tillage, yield",
author = "R. Sommer and C. Thierfelder and P.A. Tittonell and L. Hove and J. Mureithi and S. Mkomwa",
year = "2014",
doi = "10.1016/j.fcr.2014.05.012",
language = "English",
volume = "169",
pages = "145--148",
journal = "Field Crops Research",
issn = "0378-4290",
publisher = "Elsevier",
}