The MCQ on soil below will help you brush up on this important topic so you can ace your competitive exams with confidence! Studying this topic of soil is crucial for those preparing for environmental and agriculture-related exams.
MCQ on Soil
1. What is the primary composition of soil?
a. Water
b. Minerals
c. Organic matter
d. All of the above
Answer: d. All of the above
2. Which soil particle has the smallest size?
a. Sand
b. Silt
c. Clay
d. Loam
Answer: c. Clay
3. The process of soil formation is known as:
a. Erosion
b. Weathering
c. Leaching
d. Compaction
Answer: b. Weathering
4. Soil pH is a measure of:
a. Soil texture
b. Soil fertility
c. Soil acidity or alkalinity
d. Soil structure
Answer: c. Soil acidity or alkalinity
5. Which type of soil has the best water retention capacity?
a. Sandy soil
b. Clayey soil
c. Loamy soil
d. Silty soil
Answer: b. Clayey soil
6. The ideal soil for agriculture is:
a. Sandy soil
b. Clayey soil
c. Loamy soil
d. Peaty soil
Answer: c. Loamy soil
7. Which nutrient is often referred to as the ‘king of nutrients’?
a. Nitrogen
b. Phosphorus
c. Potassium
d. Calcium
Answer: a. Nitrogen
8. Soil erosion is caused by:
a. Wind and water
b. Plant roots
c. Microorganisms
d. Fertilizers
Answer: a. Wind and water
9. Which soil conservation method involves plowing across the slope of the land?
a. Contour plowing
b. Strip cropping
c. Terracing
d. Crop rotation
Answer: a. Contour plowing
10. The soil horizon that contains the most organic matter is:
a. A horizon
b. B horizon
c. C horizon
d. O horizon
Answer: d. O horizon
Also see: MCQ on Atmosphere