Chapter 9 Soil acid-base and redox reaction Section 1 The formation of soil acid-base The acid-base reaction of soil The acid-base reaction of soil is change in soil pH. soil oH is probably the single most important chemica charecteristic of a soil. The knowledge of ph is needed to understand important chemical processes such as ion mobility, precipitation and dissolution equilibria, and oxidation-reduction equilibria. a knowledge of ph is also needed to understand nutrient availability to plants and the negative response of many plant species to soil acidity The soil ph value in China is about 4.5-8.5Chapter 9 Soil acid-base and redox reaction Section 1 The formation of soil acid-base The acid-base reaction of soil The acid-base reaction of soil is change in soil pH. Soil pH is probably the single most important chemical charecteristic of a soil. The knowledge of pH is needed to understand important chemical processes such as ion mobility, precipitation and dissolution equilibria, and oxidation-reduction equilibria. A knowledge of pH is also needed to understand nutrient availability to plants and the negative response of many plant species to soil acidity. The soil pH value in China is about 4.5-8.5