Chapter 9 Soil acid-base and redox reaction 中土壤酸碱度分布图 盐基能和度% P H 5=5 20-60 7.5-8,5
Chapter 9 Soil acid-base and redox reaction
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 4.5-8.5
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 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
中土壤酸碱度分布图 盐基饱和度 P H 盐饱和度 ac-10c 20-60 7,5-8.5 1 62一33 4-6-1
、 Soil acidity (-) The cause of soil acidity 1. Climatic factor 2. Biological factor 3. Fertilizer application and irrigation 1. The source of hydrogen ions. (1 Water dissociation (2) Carbon dioxide (3) Organic acid (4 Inorganic acid(inorganic fertilizer) (5 Acid rain
一、Soil acidity （一）The cause of soil acidity 1． Climatic factor 2．Biological factor 3．Fertilizer application and irrigation 1.The source of hydrogen ions （1）Water dissociation （2）Carbon dioxide （3）Organic acid （4）Inorganic acid (inorganic fertilizer) （5） Acid rain
Acid rain Acid rain is caused by the burning of fossil fuels Burning oil, gas and coal in Acid Rain Formation power stations releases Sulfuric Dioxide(SO2) into Acid the atmosphere Burning oil and gasoline in motor vehicles puts nitrogen 50 oxides(NOx) into the atmosphere These gases mix with water droplets in the atmosphere 田田田 creating weak solutions of nitric and sulfuric acids When precipitation occurs these solutions fall as acid rain
Acid rain ▪ Acid rain is caused by the burning of fossil fuels. ▪ Burning oil, gas and coal in power stations releases Sulfuric Dioxide (SO2 ) into the atmosphere. ▪ Burning oil and gasoline in motor vehicles puts nitrogen oxides (NOX) into the atmosphere. ▪ These gases mix with water droplets in the atmosphere creating weak solutions of nitric and sulfuric acids. ▪ When precipitation occurs these solutions fall as acid rain