
%0 Journal Article
%A Hughes, JC 
%A Gilkes, RJ 
%T The effect of soil properties and level of fertilizer application on the dissolution of sechura rock phosphate in some soils from Brazil, Colombia, Australia and Nigeria
%J Soil Research
%D 1986/06/01
%V 24
%N 2
%P 219-227
%K 
%R https://doi.org/10.1071/SR9860219
%U https://www.publish.csiro.au/paper/SR9860219 
%X The extent and rate of dissolution of Sechura rock phosphate in 30 soils from Brazil, Colombia, Australia and Nigeria were measured. There was an initial rapid dissolution within 1 day, and this was followed by slower dissolution up to 124 days. For all soils an increase in the level of rock phosphate resulted in a smaller proportion dissolving. After 31 days, the percentage dissolved differed widely between soils and for rock phosphate application levels of 0.34 and 34 mg g-1 soil ranged over 0-100%, and 0-21% respectively. Pyrophosphate and oxalate-extractable iron and aluminium were important soil properties for predicting the amount of rock phosphate dissolution; pH, organic carbon, silt content and exchangeable calcium were subsidiary predictive properties for some soils. 
