Nitrogen Retention and Plant Uptake on a Highly Weathered Central Amazonian Ferralsol Amended with Compost and Charcoal,
Steiner, C., Glaser B., Teixeira W. G., Lehmann J., Blum W. E. H., and Zech W.
, Journal of Plant Nutrition and Soil Science, Volume 171, p.893-899, (2008)