Question 11
WAEC_MODEL_QUESTIONS_VOL1
•
2021
•
AGRICULTURAL_SCIENCE
•
objective
Explain why soil pH is a critical factor influencing nutrient availability to crops.
Answer Options
A.
Because pH determines the temperature of the soil, and most crops grow best when the pH is between 6.0‑7.0, while extreme pH values cause heat stress.
Correct Answer
B.
Because pH controls the chemical form and solubility of nutrients; most nutrients are optimally available in the pH range 6.0‑7.0, while too low or too high pH reduces availability or causes toxicity.
C.
Because pH changes the color of the soil, making it easier to see nutrient deficiencies; the optimal pH range is 6.0‑7.0, and outside this range the soil appears dull.
D.
Because pH influences the soil's moisture content; nutrients are most available when the pH is 6.0‑7.0, and low or high pH dries out the soil.
Correct Answer
B
Correct Option:
Because pH controls the chemical form and solubility of nutrients; most nutrients are optimally available in the pH range 6.0‑7.0, while too low or too high pH reduces availability or causes toxicity.
About This Question
This is
Waec Model Questions Vol1
2021
Agricultural Science
Question 11.
It is one of the
objective
questions from the
2021
Waec Model Questions Vol1
Agricultural Science
examination.
Difficulty level:
Easy
.