4.3 - Soil Properties

What are the three main components that make up all soil types?

• rocks, roots, and bacteria

• sand, gravel, and peat

• sand, silt, and clay

• loam, pet, and limestone

What determines the texture and porosity of soil?

• Depth of the soil

• Organic matter percentage

• Size of sand, silt, and clay particles

• Soil temperature

A soil sample contains 45% sand, 35% silt, and 20% clay. How is it classified?

• Sandy clay

• Clay loam

• Loam

• Silt Loam

How are porosity and permeability related to water holding capacity?

• They directly increase it

• They have no effect

• They have an inverse relationship

• They improve only oxygen flow

Which soil component helps bind positively charged nutrients due to its negative charge?

• Sand

• Water

• Clay

• Gravel

What does darker color soil usually indicate?

• Poor water retention

• High clay content

• Low organic matter

• High humus content and better nutrient retention