Tag: mud and stones

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Questions Related to mud and stones

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

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

  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
Reveal answer Fill a bubble to check yourself
E Correct answer
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.

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

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

  1. Provides nutrients

  2. Raises pH

  3. Retains moisture

  4. Humus does all of the above in soil
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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

  1. Manganese nodules

  2. Phosphorite nodules

  3. Magnesium nodules

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.