Soil pH and Plant Growth Conditions Quiz

Why are strongly acidic soils (pH 4.0) unfavourable for plant growth?

They interfere with the growth of crops and reduce yield.

What can happen to the concentration of Al, Mn, and Fe in extremely acidic soils (pH 4.0)?

Increase to toxic levels

What effect do strongly alkaline soils (pH 8.5) have on crop production?

Reduce yield

Why should soils be limed when their pH falls below 5.0?

To enhance plant growth Signup and view all the answers

Which soil pH requirement is most suitable for Rice (upland) cultivation?

5.0-6.5 Signup and view all the answers

How does the Cation Exchange Capacity (CEC) of soil affect nutrient availability?

Higher CEC leads to greater nutrient availability. Signup and view all the answers

How does soil pH affect the availability of nutrients for plant growth?

Low pH decreases nutrient availability Signup and view all the answers

What effect does a high cation exchange capacity (CEC) have on plant growth?

Increases nutrient uptake by plants Signup and view all the answers

Why is fertile soil generally dark in color?

Dark color indicates high fertility and organic content Signup and view all the answers

How does soil color impact the availability of nutrients in the soil?

Soil color does not affect nutrient availability Signup and view all the answers

What is the role of soil pH in determining the quality of soil for plant growth?

Ideal pH levels in soil promote optimal plant growth Signup and view all the answers

How does soil pH affect the absorption of nutrients by plant roots?

Nutrient absorption is not impacted by soil pH Signup and view all the answers

What is the critical role of temperature in plant growth?

Influences seed germination and flowering processes Signup and view all the answers

Why is an inadequate amount of water detrimental to plant growth?

Results in reduced yields and crop quality Signup and view all the answers

What temperature range do plants generally require to survive?

20oC to 25oC Signup and view all the answers

How does water influence the opening and closing of stomata in plants?

Leads to decreased CO2 entry into the cell Signup and view all the answers

What happens when plants are exposed to temperatures above their survival range?

Their maturity is delayed Signup and view all the answers

How does water help cool down plants during the transpiration process?

By releasing excess heat to the atmosphere Signup and view all the answers