Root development impacts on the distribution of phosphatase activity: Improvements in quantification using soil zymography

C. D. Giles^*, L. Dupuy, G. Boitt, L. K. Brown, L. M. Condron, T. Darch, M. S.A. Blackwell, D. Menezes-Blackburn, C. A. Shand, M. I. Stutter, D. G. Lumsdon, R. Wendler, P. Cooper, C. Wearing, H. Zhang, P. M. Haygarth, T. S. George