Which of the following nutrient play the most effective role in controlling rate of transpiration:
Correct answer: A. Potassium
- A. Potassium
- B. Zinc
- C. Phosphorus
- D. Mg
Explanation
Potassium regulates stomatal opening and closing, so it strongly controls the rate at which plants lose water through transpiration. Zinc, phosphorus and magnesium have important functions, but they do not regulate stomatal movement as directly.
Last updated
Practise Agronomy
312 free Agronomy MCQs from Agriculture, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Agriculture questions like this
Agriculture is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
Related questions
A compound toxic to crop formed by the thermal decomposition of urea is_________________?
A condition of green plant in which they become unhealthy and pale yellow in colour in known as_________________?
A condition of green plants in which they become unhealthy and pale fellow in colour is known as_________________?
A controlled oxidation process by which all organisms ultimately obtain the energy stored in organic compound is known as_______________?
A crop grown on residual moisture after harvesting rice is called__________________?