Soil pH

What is the pH value of acidic lakes?

• 3.5

• 4.5

• 5.5

• 6.5

Which substance is an example of a basic solution with a pH of 12?

• Soapy water

• Bleach

• Ammonia

• Liquid drain cleaner

What is the optimal pH range for growing potatoes?

• 5.5 - 6.5

• 6.0 - 7.0

• 6.5 - 7.5

• 5.0 - 6.0

How does soil acidification occur naturally?

• Through volcanic activity

• By weathering of soil

• Due to deforestation

• From animal activity

What is the optimum pH range for most crops?

• 4.0 - 5.0

• 5.5 - 7.0

• 6.5 - 8.0

• 7.5 - 9.0

Which of the following is a physical property affected by pH?

• Soil color

• Soil texture

• Soil temperature

• Soil moisture

At what pH is Copper most available?

• 4.5

• 5.0

• 6.0

• 7.0

What do wood ashes provide as a source?

• Nitrogen

• Phosphorus

• K, Ca, Mg CO₃’s (cations)

• Iron

What is the recommended amount of lime to add per 1000 sq ft?

• 5-10 lbs

• 10-15 lbs

• 15-25 lbs

• 25-35 lbs

Which of the following is NOT a source of cations mentioned in the text?

• Wood ashes

• Lime

• Sulfur

• Dolomitic lime