Water available to plant is:

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. 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

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

   A. Turgidity
   B. Wilting coefficient
   C. Field capacity
   D. Water retaining power of the soil

4. A three year old plant of poplar and Tamarix gallica consumes ______ liters and ____ liters of water per day, respectively under optimum supply conditions:

   A. 45,60
   B. 50,70
   C. 60,80
   D. None of these

5. To prevent wind and water erosion, the crop is sometimes harvested in such a way that a basal stub of the plant is left behind. This phenomenon is called:

   A. Ley farming
   B. Mulching
   C. Basin listing
   D. Strip cropping

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. 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

8. When a big fish eats a small fish, which easts water-fleas supported by phytoplankton, the water leas are:

   A. Primary consumers
   B. Producers
   C. Secondary consumers
   D. Top consumers in this food chain

9. BOD value of sewage water than that of tap water is:

   A. More
   B. Less
   C. Equal
   D. Somewhere more somewhere less

10. As compared to tap water the BOD of sewage polluted water shall be:

    A. High
    B. Low
    C. Same
    D. None of these