Daniel Markewitz Chemical Quotations

The great advantage of hydrogen ion budgets is that they integrate information about many chemical and biological processes into a single parameter for comparison, ... In addition, we had the great advantage of soil samples archived from all collection years to evaluate changes in the soil exchange complex and the potential accumulation of sulfate, the predominant component of acid rain within the soil profile.

Most studies on acid rain have looked at the soil from one to 10 years or less, ... where we couldn't reliably quantify the chemical changes in the soil exchange complex.