Terracing is an affective method of soil conservation:

  1. Plains
  2. Hilly areas
  3. Desert areas
  4. Riverine areas

Most essential component for crops is

  1. water
  2. fertilizers
  3. soil
  4. humidity

 One of the following crops is the most effective in controlling soil erosion:

  1. Maize
  2. cotton
  3. Green gram
  4. Pigeon pea

Crops that need a lot of water are

  1. rice and maize
  2. wheat and maize
  3. rice and wheat
  4. maize and other grains

Remains of salt over soil after evaporation of water is known as:

  1. Salivation
  2. Dehydration
  3. Water logging
  4. Hydration