Soil Terms Quiz

What is the pH value of acid soil?

• 7.0 or higher

• 6.5

• 6.0

• Less than 7.0

What process leads to the formation of soil aggregates?

• Compaction

• Aggregation

• Erosion

• Leaching

Which term describes the removal of soluble materials from one zone in soil to another?

• Decalcification

• Humification

• Leaching

• Salinization

What is the primary characteristic of saline-sodic soil?

• High organic matter content

• High exchangeable sodium percentage

• High clay content

• Low pH

Which mineral is synonymous with Chernozem?

• Black Earth

• Boulder clay

• Feldspar

• Gibbsite

What is the term for the layer of soil occurring on the surface?

• Topsoil

• Parent material

• Subsoil

• Bedrock

What is the process of soil formation called?

• Soil classification

• Soil degradation

• Soil monitoring

• Pedogenesis

What does the term 'gley soil' refer to?

• Soil formed under dry conditions

• Soil formed under waterlogged conditions

• Soil with high clay content

• Soil with high organic matter

Which of the following is a characteristic of sandy soils?

• High water retention

• Rapid permeability

• High shrink-swell capacity

• High organic matter content

What is the term for the upper surface of ground water?

• Ground water

• Field capacity

• Vadose zone

• Water table