Crops grow well when they are:

  1. fertilized
  2. irrigated
  3. cared
  4. wilted

A’ horizon of the soils also designated as:

  1. Eluviated horizon
  2. Illuviated horizons
  3. Both (a) & (b)
  4. None of these

 Jute cultivation in India is concentrated in the delta area of which of the following rivers?

  1. Ganga
  2. Mahanadi
  3. Brahmaputra
  4. Godavari

Which one is the natural insecticide in the following?

  1. Pyrethrum
  2. Nicotine
  3. both (a) and (b)
  4. none of these