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Questions and Answers
What is the main reason for urban soils being different from natural soils?
What is the main reason for urban soils being different from natural soils?
- They are heavily impacted by animal activity.
- They are highly acidic
- They are compacted and lack organic matter. (correct)
- They are rich in nitrogen.
What are the three main types of soil found in urban areas?
What are the three main types of soil found in urban areas?
- Acidic soils, alkaline soils, and neutral soils.
- Organic soils, mineral soils, and peat soils.
- Sandy soils, clay soils, and loamy soils.
- Raw soils, topsoiled sites, and deep humus soils. (correct)
Which of the following materials is not included in raw soils?
Which of the following materials is not included in raw soils?
- Chemical wastes
- Subsoil
- Organic matter (correct)
- Brick rubble
What is the pH level of brick rubble?
What is the pH level of brick rubble?
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Which type of soil in urban areas is very fertile due to organic matter and ash incorporation?
Which type of soil in urban areas is very fertile due to organic matter and ash incorporation?
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What is the main limitation for plant growth in raw soils?
What is the main limitation for plant growth in raw soils?
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What can affect the pH and drainage of deep humus soils in urban areas?
What can affect the pH and drainage of deep humus soils in urban areas?
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Study Notes
- Urban soils are heavily impacted by human activity and can be very different from natural soils.
- Urban soils are often compacted and lack organic matter.
- There are three main types of soil in urban areas: raw soils, topsoiled sites, and deep humus soils.
- Raw soils include brick rubble, other aggregates, subsoil, and chemical wastes.
- Raw soils are young and lack vertical differentiation and organic matter.
- Brick rubble is highly alkaline and has high levels of nutrients, while other aggregates are more acidic and lower in nutrients.
- Nitrogen is low in all raw soils, limiting plant growth.
- Topsoiled sites may not be fertile and can have low nitrogen levels.
- Deep humus soils are found in gardens and allotments and are very fertile due to organic matter and ash incorporation.
- Deep humus soils may be impacted by building remains and their pH and drainage can be affected.
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