Soil pH and Its Importance

What is the study of soil called?

• Ecology

• Biology

• Geology

• Pedology

What pH value is considered neutral for soil?

• 5

• 7

• 8

• 6

Which element is commonly found in acidic soils?

• Potassium

• Calcium

• Magnesium

• Hydrogen

In which pH range do soil bacteria operate best?

• 5.5 to 7.0

• 7.5 to 9.0

• 4.0 to 5.0

• 6.5 to 8.0

What happens to plant nutrients in soils with a pH below 5?

• They become more available

• They leach out rapidly

• They become toxic

• They remain unchanged

Which of the following is NOT required for a soil pH test?

• Microscope

• pH paper

• Test tubes

• Beakers

What is the first step in the soil pH determination procedure?

• Weigh soil samples

• Add indicator solution

• Filter the solution

• Add distilled water

How many soil samples are tested in the video?

• Five

• Four

• Six

• Three

What is the purpose of using a universal indicator solution in the soil pH test?

• To filter the soil

• To measure soil weight

• To determine soil pH

• To dry the soil

Which soil sample was found to be neutral in the video?

• Sample 4

• Sample 3

• Sample 2

• Sample 1