Water logging and soil salinization is a twin menace which has effected the agriculture sector severely, about _______________ hectares of land are wasted yearly?

Related Mcqs:

1. Water logging is the state of the soil where the water table brought ______________capacity or root zone of plants?

   A. Far from
   B. Within
   C. Below
   D. Near

2. Water logging caused by ____________ water, which during excessive irrigation percolates down and join under ground water table?

   A. Capillary
   B. Hygroscopic
   C. Gravity
   D. Free

3. The field capacity is the water retained by a saturated soil after free drainage of surplus water to the ground water table but the water retained by a saturated soil after being centrifuged by a centrifugal force of 1000 times that of gravity is called________________?

   A. Soil moisture
   B. Equivalent moisture
   C. Field moisture
   D. Available moisture

4. The field capacity is the amount of water retained by a saturated soil mass after being acted by gravity. The amount of water required to bring the soil moisture content of that soil up to field capacity is called__________________?

   A. Soil-moisture deficiency
   B. Field-moisture deficiency
   C. Equivalent-moisture deficiency
   D. a and b are correct

5. The law that states that the discharge of sub-soil water is directly proportional to the loss of head and the area of soil sample and inversely proportional to to the length of soil sample ___________________?

   A. Archimed’s principle
   B. Darcy’s law
   C. Permeability law
   D. Thiem’s law

6. Hydrology is the science which deals with the depletion and recharge of water resources yearly therefore. its knowledge is a must to _________________ properly the water resources?

   A. Develop
   B. Manage
   C. Remodel
   D. Rehabilitate

7. The minimum moisture content at which a water drop if placed on a smooth surface of soil will not be absorbed immediately by the soil is called __________________?

   A. Soil moisture content
   B. Moisture content
   C. Soil saturation
   D. All are correct

8. At the end of hydraulic structure, the upward force of sub-soil water just becomes equal to the submerged weight of soil grains Then exit gradient will be called______________?

   A. Submerged exit gradient
   B. Critical exit gradient
   C. Balanced exit gradient
   D. All are correct

9. An area is officially declared as drought effected if the mean Annual rain fall is less than of the annual Potential evaporation,______________?

   A. 70%
   B. 75%
   C. 80%
   D. 85%

10. The water particles held in soil pores of root zone by _____________ against gravity and is known as capillary water?

    A. Cohesive force
    B. Capillary force
    C. Tension force
    D. Gravity force