FREE CPP Soil Science & Fertilization Questions and Answers

Question 1

What is the ideal pH range for most garden plants?

Accepted Answer

6.0–7.0

Answer

4.0–5.0

Answer

5.0–5.5

Answer

7.5–8.5

Question 2

Which nutrient is primarily responsible for root development?

Accepted Answer

Phosphorus

Answer

Nitrogen

Answer

Potassium

Answer

Calcium

Question 3

Which soil texture holds the most water?

Accepted Answer

Clay

Answer

Sand

Answer

Loam

Answer

Silt

Question 4

What does N-P-K stand for on a fertilizer label?

Accepted Answer

Nitrogen–Phosphorus–Potassium

Answer

Nickel–Phosphate–Kerosene

Answer

Nitrogen–Potash–Kerosene

Answer

Nickel–Phosphate–Potassium

Question 5

What is the function of nitrogen in plant growth?

Accepted Answer

Encourages leaf growth

Answer

Promotes flowering

Answer

Supports root growth

Answer

Enhances disease resistance

Question 6

What is a major benefit of organic matter in soil?

Accepted Answer

Improves soil fertility

Answer

Lowers oxygen levels

Answer

Prevents root development

Answer

Increases pest activity

Question 7

Which amendment is used to raise soil pH?

Accepted Answer

Lime

Answer

Gypsum

Answer

Sulfur

Answer

Compost

Question 8

What tool is used to determine soil nutrient content?

Accepted Answer

Soil test kit

Answer

Tensiometer

Answer

Moisture meter

Answer

pH strip

Question 9

Which macronutrient deficiency causes purpling of older leaves?

Accepted Answer

Phosphorus

Answer

Nitrogen

Answer

Calcium

Answer

Magnesium