Percentage of water left in the soil when a plant wilts is known as:

Related Mcqs:

1. When a plant first begins to wilts permanently in a pot, its 54.5 gms of soil has 4.5 gms of water. The PWP of this soil is:

   A. 4.50%
   B. 9%
   C. 8.25%
   D. 16.50%

2. When a soil has been thoroughly wetted and then allowed to drain until capillary movement of the water has stopped, the water content of the soil will give an estimate of it’s:

   A. Gravitational water
   B. Capillary water
   C. Field capacity
   D. Storage capacity

3. Removal of top soil by soil erosion result in the loss of soil:

   A. Nitrites
   B. Nitrates
   C. Nitrogen
   D. Nitric and nitrous acids

4. In water logged soil plants cannot grow properly because the soil is:

   A. Physiologically wet
   B. Physiologically dry
   C. Physically dry
   D. None of the above

5. The water held tightly in a thin film by te soil particles is known as:

   A. Run away water
   B. Hygroscopic water
   C. Capillary water
   D. Gravitational water

6. The ration of volume of pores in the soil to the total soil volume is referred to as:

   A. Pore frequency ratio
   B. Pore density ration
   C. Pore abundance ratio
   D. Pore space ratio

7. 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

8. The stems of submerged water plant are soft and weak because:

   A. They are absolutely devoid of xylem
   B. They totally lack phloem
   C. They do not have stomata
   D. The supporting tissues and xylem are feebly developed

9. Water available to plant is:

   A. Run off water
   B. Gravitational water
   C. Hygroscopic water
   D. Capillary water

10. Water-logged condition will quickly occur in which type of soil?

    A. Sand
    B. Loam
    C. Graved
    D. Clay