Environmental Science 15th Edition by Scott Spoolman,Tyler Miller

تمرين 19

What is the key concept for this section? List two major benefits of high-yield modern agriculture. Define soil and describe its formation and the major layers in mature soils. What is topsoil and why is it one of our most important resources? What is soil erosion and what are its two major harmful environmental effects? What is desertification and what are its harmful environmental effects? Define soil salinization and waterlogging and explain why they are harmful. What is soil pollution and what are two of its causes?