@article{article71c2ca78,
title   = {Agronomic effectiveness of cationic phosphate impurities present in superphosphate fertilizers as affected by soil pH},
author = {Prochnow, Luís Ignácio and Chien, S. H. and Camona, G. and Austin, E. R. and Corrente, José Eduardo and Alleoni, Luís Reynaldo Ferracciú},
year = {2006},
doi = {10.1080/00103620600770417},
journal   = {Communications in Soil Science and Plant Analysis}
}