Small rivulets or finger like channels formed on the surface of earth by action of water, these channels are of small depth & can be leveled by tillage operations is:

Related Mcqs:

1. Shallow channels that can be readily corrected by routine tillage operations is called:

   A. Permanent gullies
   B. Ephemeral gullies 
   C. Both A & B
   D. None of these

   Submitted by: Shafiq Rehman

2. Any tillage and planting system that maintains at least 30% of the soil surface covered by residue after planting for the purpose of reducing soil erosion by water:

   A. Deep Tillage
   B. Conservation Tillage
   C. Both a & b
   D. None of these

   Submitted by: Shafiq Rehman

3. _________ erosion is the removal of a thin layer of soil by water acting over the whole surface. This type of erosion damaged very fertile lands located on slopes, some of which have been eroded to a depth of about 15 cm.

   A. Rain splash rill erosion
   B. Stream bank erosion
   C. Sheet erosion
   D. Gully erosion

   Submitted by: Shafiq Rehman

4. In no tillage systems, the soil layers have?

   A. Higher total pore space
   B. Lowe bulk density
   C. Higher bulk density
   D. None of the above

   Submitted by: Shafiq Rehman

5. How much of the earth surface is covered with water ___________________?

   A. 65%
   B. 70%
   C. 80%
   D. 40%

6. The immobilization and accumulation of the eluviated constituents at some depth beneath the soil surface:________?

   A. Iluviation
   B. Eluviation
   C. Illuviation
   D. Melanization

   Submitted by: Shafiq Rehman

7. Which chemical used to prevent evaporation from surface of water in water bodies?

   A. Cetyle alcohol
   B. Methyle alcohol
   C. both A and B
   D. None of these

   Submitted by: Shafiq Rehman

8. Which chemical used to prevent evaporation from surface of water in water bodies?

   A. Cetyle alcohol
   B. Methyle alcohol
   C. both A and B
   D. None of these

   Submitted by: Shafiq Rehman

9. Fine-graned rocks formed on earth crust are called____________________?

   A. Intensive igneous rock
   B. Extrusive rock
   C. Sedimentary rock
   D. Plutonic

10. The atmospheric layer lies closest to the earth surface is known as___________________?

    A. Mesosphere
    B. Thermosphere
    C. Troposphere
    D. Stratosphere