Rapid methods of examining soils. III. The use of dihydrogen potassium phosphate in studying base exchange capacity

Summary

The reduction in the electrical conductivity of a mixed solution of K₂HPO₄ and KH₂PO₄ caused by the addition of soil is a measure of the potassium uptake, and is therefore an indication of the “;base exchange capacity” of the soil at pH. 7. Two disturbing factors are noted, and it is concluded that the method is likely to be most useful where a rapid comparison of soils of a similar nature and pH is required.