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Questions and Answers
Which of the following describes cation exchange capacity?
Soil pH levels between 0-6 are considered neutral.
False
What is humification?
The process by which soil organic matter is changed into humus.
_________ is the conversion of ammonia to nitrite and nitrite to nitrate.
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Match the following soil processes with their definitions:
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Study Notes
Cation Exchange Capacity
- One ion can replace another ion in the soil.
- Clay and humus have the highest cation exchange capacity.
Soil pH
- Measures the amount of hydrogen ions in a solution.
- Impacts crop growth and activity of living organisms in the soil.
- Ranges from 0-6 are acidic, 7 is neutral, and 8-14 are alkaline.
Soil Biomass
- Refers to the total amount of living material in a habitat.
- Includes plants, worms, insects, and bacteria.
- When they die, they become organic matter.
Humification
- Process of converting soil organic matter into humus.
- Macro-organisms like earthworms and bacteria convert organic matter.
- Fungi also play a role in humification.
Role of Organisms in the Carbon Cycle
- Plants remove carbon during photosynthesis and release it through respiration.
- Livestock obtain carbon by eating plants and release it through respiration.
Nutrient Recycling
- Nitrogen fixation converts nitrogen gas into nitrates.
- Nitrogen-fixing bacteria in plant root nodules convert nitrogen gas.
- Nitrification involves the conversion of ammonia to nitrite and then nitrate.
- Denitrification converts nitrates back into nitrogen gas.
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Description
This quiz delves into various aspects of soil science, including cation exchange capacity, soil pH, biomass, and the processes of humification. Understand the roles of organisms in nutrient cycling and the carbon cycle in soil health and fertility. Test your knowledge on these vital topics for sustainable agriculture.
