Nitrification takes place only in well aerated soils because the bacteria responsible for it are:

Related Mcqs:

1. The bacteria, which reduce nitrates in the soil to gaseous nitrogen, are known as denitrifying bacteria such as:

   A. Nitromonas
   B. Pseudomonas
   C. Nostoc
   D. Rhizobium

2. The depleted soils can be enriched by the addition of:

   A. More soil
   B. Drugs
   C. Chemical fertilizers
   D. Cattle dung

3. A striking example of ______ is that of a ruminant animal such as a cow and the bacteria that live in its gut:

   A. Parasitism
   B. Commensalism
   C. Mutualism
   D. None of these

4. In coarse textured soils:

   A. There is no soil air
   B. Water retaining capacity is high
   C. Pore space is narrow
   D. Pore frequency is low

5. Soils transported by water are called:

   A. Alluvial
   B. Colluvial
   C. Residual
   D. Eolian

6. The soils that are fully laden with water i.e., water logged, are known are:

   A. Physically dry soils
   B. Physiologically dry soils
   C. Alkaline soils
   D. Acidic soils

7. The plants growing on saline soils are called:

   A. Heliophytes
   B. Xerophytes
   C. Halophytes
   D. Hydrophytes

8. Eroded soils are:

   A. Rich in plant nutrients
   B. Unaltered in plant nutrients
   C. Devoid of plant nutrients
   D. All of these

9. Dark coloured soils are considered most fertile as they contain:

   A. Gravel and sand
   B. Sand and calcium
   C. Clay and humus
   D. Silt and earthworms

10. Soils are classified on the basis of physical properties which determine:

    A. Productive capacity
    B. Supporting power
    C. Monitor storage capacity
    D. Nutrients availability
    E. All of the above