Tag: mud and stones

Questions Related to mud and stones

Match the following.

Column I Column II
I. Sandy soil A. 85% sand + 15% clay or silt
II. Loam soil B. 70% sand + 30% clay or silt
III. Silt C. 50% sand + 50% clay or silt or both
  D. 90% silt + 10% sand
evs mud and stones soil - formation and profile soil-nature soil profile

  1. I-A, II-D, lll-C

  2. I- A, II- B, lll- D

  3. I- A, II- D, lll- B

  4. I- A, II- B, lll- C

  5. I- A, II- C, lll- D

Show answer
Correct Option: E
Explanation:

Sand can refer to a textural class of soil or soil type; i.e., a soil containing more than 85% sand-sized particles (by mass) and 15% clay.

A loamy soil is one that combines sand and clay particles in relatively equal amounts. Loamy soil is ideal for most garden plants because it holds plenty of moisture but also drains well so that sufficient air can reach the roots. Loam is soil composed mostly of sand and silt, and a smaller amount of clay (about 70%-30% concentration, respectively). The soil can be called as silt if its silt content is greater than 90 percent.

Which of the following characteristics is not a function of humus in soil?

evs mud and stones soil - formation and profile soil-nature soil profile

  1. Provides nutrients

  2. Raises pH

  3. Retains moisture

  4. Humus does all of the above in soil

Show answer
Correct Option: B
Explanation:

Explanation: Humus is the end product of broken down (decayed) organic matter. Humus is an essential component of healthy soils that has many great benefits.

Mineral nodules present in ocean which can meet shortage of important soil nutrient are

evs mud and stones soil - formation and profile soil-nature soil profile

  1. Manganese nodules

  2. Phosphorite nodules

  3. Magnesium nodules

  4. All of the above

Show answer
Correct Option: B
Explanation:
  • Phosphorite rocks are spherical concentrations that are randomly distributed along the floor of continental shelves. It contains high amounts of phosphate minerals. 
  • The size of Phosphorite nodules can range up to several tens of centimetres.
  • Hence Mineral nodules present in the ocean which can meet the shortage of important soil nutrient are Phosphorite nodules.
  • So, the correct answer is 'Phosphorite nodules'.