Bravin, M N Rhizosphere pH gradient controls copper availability in a strongly acidic soil. [electronic resource] - Environmental science & technology Aug 2009 - 5686-91 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 0013-936X Standard No.: 10.1021/es900055k doi Subjects--Topical Terms: BuffersCopper--chemistryEnvironmentEnvironmental Monitoring--methodsHydrogen-Ion ConcentrationModels, StatisticalPlant Roots--metabolismRegression AnalysisSoilSoil Pollutants--chemistryTime FactorsTriticum--metabolism