Cation Exchange Capacity (CEC) of Soil (Leaving Cert Agricultural Science): Quizzes
📚Quizzes
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10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does Cation Exchange Capacity (CEC) measure in soil?
What does Cation Exchange Capacity (CEC) measure in soil?
Ability to hold positively charged nutrients
Which cation is essential for chlorophyll production in plants?
Which cation is essential for chlorophyll production in plants?
What are the standard units for expressing CEC values?
What are the standard units for expressing CEC values?
Which soil components have negatively charged surfaces that attract cations?
Which soil components have negatively charged surfaces that attract cations?
Clay particles and organic matter
What is the most common laboratory method for determining CEC?
What is the most common laboratory method for determining CEC?
EDTA titration method
What colour change indicates the endpoint in EDTA titration for CEC?
What colour change indicates the endpoint in EDTA titration for CEC?
Changes to blue
What is the typical CEC range for sandy soils in ?
What is the typical CEC range for sandy soils in ?
1-5
What does higher CEC indicate about a soil's characteristics?
What does higher CEC indicate about a soil's characteristics?
Better nutrient-holding capacity
How many grams of soil are used in the standard EDTA method for CEC determination?
How many grams of soil are used in the standard EDTA method for CEC determination?
10g
Why is three-step extraction used in the CEC procedure?
Why is three-step extraction used in the CEC procedure?
Ensures complete saturation of sites