Influence of root-induced pH on the solubility of soil aluminium in the rhizosphere
- Cite this article as:
- Gahoonia, T.S. Plant Soil (1993) 149: 289. doi:10.1007/BF00016620
Increase in solubility of soil aluminium (Al) as a result of root-induced decrease of soil pH was studied. Soil samples of known distances from the roots of NH4-N fertilized Ryegrass were analyzed for pH and aluminium extractable with 0.01 M CaCl2. Results showed that though no Al was found in bulk soil (pH 6.8), its concentration in the vicinity of roots increased to 0.023 mM with a concomitant decrease of soil pH from 6.8 to 4.4.