A site experimental method to study the transfer and transform of water-soluble contamination in soil

We have set up a kind of site experiment method to study the transfer and transform of water-soluble contam ination in soil. This method has been successfully applied to study the transfer and transform of the ammoniacal nitrogen in loess. The method has con-quered the error caused by the damage of the soil structure and the change of the redox potential in the soil column experiment.