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Questions and Answers
What is the primary purpose of soil pH testing?
What is the primary purpose of soil pH testing?
What is the correct soil-to-water ratio when preparing the soil suspension for pH testing?
What is the correct soil-to-water ratio when preparing the soil suspension for pH testing?
How long should the soil suspension be allowed to settle before measuring pH?
How long should the soil suspension be allowed to settle before measuring pH?
What should be done after each calibration of the pH meter?
What should be done after each calibration of the pH meter?
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Which of the following materials is NOT needed in the soil pH testing process?
Which of the following materials is NOT needed in the soil pH testing process?
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Study Notes
Soil pH Testing Purpose
- Soil pH testing determines soil acidity or alkalinity.
- This affects nutrient availability for plants.
Step-by-Step Process: Materials Needed
- 10 grams of air-dried, sieved soil (2-mm sieve).
- 25 mL distilled water.
- pH meter.
- Glass beaker.
- Stirring rod.
Step-by-Step Process: Prepare the Soil Suspension
- Weigh 10 grams of soil into a glass beaker.
- Add 25 mL of distilled water (1:2.5 soil-to-water ratio).
- Stir for 2-5 minutes to ensure all particles are wet.
Step-by-Step Process: Let the Mixture Settle
- Allow the suspension to stand for 30 minutes, allowing soil particles to settle.
Step-by-Step Process: Calibrate the pH Meter
- Turn on the pH meter.
- Calibrate with buffer solutions of pH 4.0, 7.0, and 9.2.
- Rinse the electrode with distilled water after each calibration to avoid contamination.
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Description
This quiz covers the purpose and step-by-step process of soil pH testing. It includes necessary materials and detailed instructions on preparing soil suspensions, calibrating pH meters, and understanding soil acidity or alkalinity. Perfect for students studying soil science and agronomy.
