@inbook{inbookb382e8f0,
title   = {Phosphate fertilizers with varying water-solubility applied to amazonian soils. II. Soil P extraction methods},
author = {Muraoka, Takashi and Brasil, Edson Carvalho and Scivittaro, Walkyria Bueno},
year = {2002},
publisher = {IAEA},
journal   = {Assessment of soil phosphorus status and management of phosphatic fertilisers to optimise crop production}
}