What individual components, such as the minerals, organic matter and humus, are combined into larger groupings known as aggregates or peds?
soil structure
2 of 24
A soil that will readily break up into crumbs is called what?
friable
3 of 24
What requires an environment that is warm, moist, friable and porous?
plant roots
4 of 24
What has the largest particle size?
gravel
5 of 24
What has the smallest particle size?
clay
6 of 24
Which soil feels gritty when wet?
sandy loam
7 of 24
Which soil feels sticky when wet?
clay loam
8 of 24
Which soil feels silky and soapy when wet?
silty loam
9 of 24
Which soil has a negative electrical charge?
clay loam
10 of 24
Which soil has the best drainage?
sandy loam
11 of 24
Which soil has good water retention?
clay loam
12 of 24
Which soil is quick to heat up?
sandy loam
13 of 24
What kind of weathering is caused by heat, cold, wind, rain and ice
Physical
14 of 24
What kind of weathering is caused by water in the soil disolving some of the minerals in the rocks. Soil water tends to be slightly acidic, which accentuates this.
Chemical
15 of 24
Plant roots can penetrate fissures and crevices, and as they grow can dislodge mineral particles. Which type of weathering is this?
biological
16 of 24
What makes up the full depth of soil?
horizons
17 of 24
What kind of lumps does subsoil have?
large
18 of 24
What is the most fertile part of the soil?
topsoil
19 of 24
Is subsoil lighter or darker than topsoil?
lighter
20 of 24
What contains most of the plant roots?
topsoil
21 of 24
Which soil horizon is the most suitable for plant growth?
topsoil
22 of 24
The weathering of what is the key to the formation of soil?
rocks
23 of 24
What is the vertical section through the soil called?
Soil profile
24 of 24
Other cards in this set
Card 2
Front
What individual components, such as the minerals, organic matter and humus, are combined into larger groupings known as aggregates or peds?
Back
soil structure
Card 3
Front
A soil that will readily break up into crumbs is called what?
Back
Card 4
Front
What requires an environment that is warm, moist, friable and porous?
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