Which of the following nutrient play the most effective role in controlling rate of transpiration:

Related Mcqs:

1. Chemicals, used for controlling the disease of crops, fruits & vegetables is___________ & chemical prepared for controlling insect-pests ——————-:

   A. Insecticides—Herbicides
   B. Fungicides—Insecticides
   C. Weedicides—insecticides
   D. None of the above

   Submitted by: Shafiq Rehman

2. The water loss through transpiration from vegetative and evaporation from soil surface is known as__________________?

   A. Evaptranspiration
   B. Transpiration
   C. Evaporation
   D. Guttation

3. __________________ systems play a crucial role in increasing soil organic C storage and reducing net emissions of greenhouse gases in addition to soil erosion control:

   A. Engineering
   B. Agroforestry 
   C. Cultivating
   D. All of the above

   Submitted by: Shafiq Rehman

4. Which of the following nutrient elements are regarded as energy exchangers:

   A. Hydrogen
   B. Oxygen
   C. Both A & B
   D. None of these

   Submitted by: Shafiq Rehman

5. The nutrient particularly influencing root growth is___________________?

   A. Zinc
   B. Nitrogen
   C. Organic
   D. Phosphorus

6. The seventieth element included in the list of essential nutrient element is:__________?

   A. Vanadium
   B. Cobalt
   C. Sodium
   D. Nickle

   Submitted by: Shafiq Rehman

7. The major soil fertility problems in Pakistani soils deficiencies of N, P and Zn. Deficiencies K, Fe, and B also occur in specific crop genotypes or soil types, while deficiencies of S, Cu, and Mn are negligible. however, the common nutrient deficiencies are_________________: and some micronutrients including Mo?

   A. N, P, K
   B. Ca, Mg, S
   C. both A & B
   D. The above statement is wrong

   Submitted by: Shafiq Rehman

8. If a manure pile is exposed to the rain, what nutrient will be lost the most ?

   A. Ca
   B. Mg
   C. S
   D. N

   Submitted by: Shafiq Rehman

9. Which leaf of rice is sampled for tissue nutrient analysis?

   A. Mature leaf
   B. Lower leaf
   C. Both A & B
   D. None of these

   Submitted by: Shafiq Rehman

10. Immobile nutrient in soil is:_________?

    A. P
    B. N
    C. Mg
    D. None of the above

    Submitted by: Shafiq Rehman