Question

In clayey soils, adding the large quantities of organic matter help _____ .

• A. In drainage
• B. In avoiding water logging
• C. In increasing the water holding capacity
  
• D. both a and b

Answer 1

Answer: (D)

both a and b

• The bulk of organic matter in manure helps in improving the soil structure.
• This involves increasing the water holding capacity in sandy soils.
• However clayey soil already has much more water holding capacity due to the small size of clay particles.
• The small size of clay particles means they fit closely together, leaving less room for air, water, and nutrients to move.
  
• Adding large quantities of organic matter or composted leaves in this case will help in drainage and in avoiding waterlogging.

So, the correct answer is option D.