A. MULTIPLE-CHOICE QUESTIONS: Choose the most appropriate answer. 1. Humus and the smallest particles of rock form the a. A-horizon. b. B-horizon. c. C-horizon. d. bedrock 2. Which of these has the smallest size of particles? a. sand b. silt c. clay d. gravel 3. Which type of soil is best for growing cotton? a. sandy b. clayey c. loamy d. sandy-loam 4. Which of these does not cause weathering'? a. clouds b. wind c. flowing water d. freezing of rainwater 5. Water percolating into the soil collects over a. A-horizon. b. B-horizon. c. C-horizon. d. none of these 6. Water logging can be expected in soil which is rich in a. sand. b„ clay. c. silt. d. humus. 7. Paddy grows best in a. clayey soil. b. loam. c. sandy soil. d. sandy-loam. Answer. 1. a 2. c 3. d 4. a 5. d 6. b 7. a B. VERY SHORT-ANSWER QUESTIONS: Give one-word answers. 1. Breaking down of rock into smaller pieces by natural forces is called ----. 2. Which absorbs more water—sandy soil or cl
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