The Secrets of Soil pH Unearthed

What is soil pH?

• The color of the soil

• The temperature of the soil

• The measure of acidity or alkalinity in the soil

• The nutrient content of the soil

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NGSS.MS-LS1-5

NGSS.MS-LS2-4

Which tool is commonly used to measure soil pH?

• Barometer

• pH meter

• Hygrometer

• Thermometer

What is the pH range at which most plants thrive?

• 3.0 - 5.0

• 4.5 - 6.0

• 5.5 - 7.0

• 6.0 - 8.0

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NGSS.MS-LS1-5

How does a high soil pH (alkaline soil) affect plant nutrient availability?

• Increases availability of all nutrients

• Decreases availability of phosphorus and micronutrients

• Has no effect on nutrient availability

• Decreases availability of nitrogen and potassium

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NGSS.MS-LS1-5

NGSS.MS-LS2-1

What can be the consequence of extremely low soil pH (highly acidic soil) for plants?

• Enhanced growth due to increased nutrient availability

• Stunted growth due to aluminum toxicity

• Attraction of beneficial insects

• Increased water retention

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NGSS.MS-LS1-5

Why is maintaining the correct soil pH important for farmers?

• To ensure the best color of the crops

• To regulate the temperature of the soil

• To maximize crop yield and quality

• To prevent soil erosion

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NGSS.MS-LS1-5

NGSS.MS-LS2-1

Which of the following is a natural amendment used to raise the pH of acidic soil?

• Sulfur

• Compost

• Lime

• Iron sulfate

What is the effect of adding organic matter to soil on its pH?

• It always increases pH

• It always decreases pH

• It can help buffer and stabilize pH

• It has no effect on pH

Which pH level is generally considered neutral in soil?

• 5

• 6

• 7

• 8

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NGSS.MS-LS2-4

What is the term for the process of adjusting soil pH to a desired level?

• Soil conditioning

• Soil texturing

• Soil modification

• Soil amendment