@book{ec8c944b679e43e48aa586825cd526e3,
title = "Description agronomique quantitative des systOmes de production v{\'e}g{\'e}tale en zone Soudano-Sah{\'e}lienne",
keywords = "plantenvoeding, kunstmeststoffen, mest, stikstof, fosfor, groei, gewassen, oogsttoename, oogstverliezen, opbrengsten, sahel, plant nutrition, fertilizers, manures, nitrogen, phosphorus, growth, crops, yield increases, yield losses, yields, sahel",
author = "W. Quak and H. Hengsdijk and E.J. Bakker and K. Sissoko and M.S.M. Tour{\'e}",
year = "1996",
language = "Undefined/Unknown",
publisher = "AB-DLO [etc.]",
number = "no. 28",
}