CFA Soil Science & Fertilizer Chemistry

Question 1

What is the primary function of soil in plant growth?

Accepted Answer

To provide nutrients, water, and support root growth.

Answer

To act as a source of carbon dioxide.

Answer

To prevent water drainage.

Answer

To limit root expansion.

Question 2

Why is soil pH important for fertilizer application?

Accepted Answer

It affects the availability of nutrients to plants.

Answer

It controls the color of the fertilizer.

Answer

It determines the soil's texture.

Answer

It affects the water retention capacity of soil.

Question 3

What is the role of nitrogen in plant growth?

Accepted Answer

It is essential for leaf and stem growth.

Answer

It helps with root development.

Answer

It helps the plant develop flowers.

Answer

It promotes fruit ripening.

Question 4

Why is it important to understand fertilizer chemistry?

Accepted Answer

It allows for efficient and targeted fertilizer use.

Answer

It helps to increase soil pH.

Answer

It makes the fertilizer more expensive.

Answer

It helps the fertilizer dissolve faster.

Question 5

What is a macronutrient in the context of fertilizer?

Accepted Answer

Nutrients needed in large amounts, such as nitrogen, phosphorus, and potassium.

Answer

Nutrients required in small quantities.

Answer

Nutrients that help with root development.

Answer

Nutrients that increase plant flowering.

Question 6

What is the main effect of too much fertilizer on the soil?

Accepted Answer

It can lead to nutrient imbalances and environmental harm.

Answer

It improves soil texture.

Answer

It enhances soil pH.

Answer

It increases the water-holding capacity of soil.

Question 7

How can soil texture affect fertilizer application?

Accepted Answer

Clay soils retain nutrients longer, while sandy soils require more frequent applications.

Answer

It has no effect on fertilizer efficiency.

Answer

Soil texture only impacts water retention.

Answer

Soil texture determines the soil color.

Question 8

What is the importance of knowing the nitrogen-to-phosphorus ratio in fertilizers?

Accepted Answer

It helps provide the right balance of nutrients for plant growth.

Answer

It helps to increase soil pH.

Answer

It affects the fertilizer price.

Answer

It reduces the need for watering.

Question 9

How does organic matter in soil affect fertilizer application?

Accepted Answer

It improves soil structure and enhances fertilizer effectiveness.

Answer

It has no effect on fertilizer application.

Answer

It makes fertilizers less effective.

Answer

It increases the need for fertilizer.