@article{c4afcba80ad5492b993ba0c3d3217f85,
title = "Classifying, monitoring and improving soil nutrient stocks and flows in African agriculture.",
keywords = "bodemchemie, anorganische verbindingen, mineralen, bodemvruchtbaarheid, ecologie, gewassen, landbouw, fenologie, acclimatisatie, plantenvoeding, kunstmeststoffen, mest, soil chemistry, inorganic compounds, minerals, soil fertility, ecology, crops, agriculture, phenology, acclimatization, plant nutrition, fertilizers, manures",
author = "E.M.A. Smaling and L.O. Fresco and {de Jager}, A.",
year = "1996",
language = "English",
volume = "25",
pages = "492--496",
journal = "Ambio",
issn = "0044-7447",
publisher = "Springer Verlag",
}