The soil that surrounds us has a lot of living things and components that makes it up. It is very vital as it supports plant life that sustains us. This quiz tests how much you know about soils, expanding your knowledge.
Reduces surface compaction, crusting, and soil erosion
Improves soil structure
Buffers soil temperature fluctuations
All of the above
Lack of an organic layer
Altered drainage
Chemical contamination
All of the above
Soil is at field capacity and all gravitational water has drained
Available water is held in the root ball of a newly planted tree and absorberd by the roots as needed
Trees are approaching the permanent wilting point andin need of irrigation to prevent drought damage
A tree is planted in clay soil, but is then backfilled with a more course soil that may act as a bowl and retain water
Organic layer
Macropores
Rhizosphere
Parent material
Accumulate in the upper layer as it slowly infiltrates into the lower layer
Drain uniformly through both layers
Pool in the upper layer of sandy soil and drain no farther
None of the above
45% mineral matter, 50% pore space, 5% OM
5% mineral matter, 50% pore space, 45%OM
45% mineral matter, 5% pore space, 50% OM
5% mineral matter, 45% pore space, 50% OM
The zone of intense biological activity surrounding actively elongating roots
Microscopic roundworms that feed on pathogenic, disease causing organisms
The diversity of organisms living, moving and interacting in the soil
An altered environment within the soil where many organisms flourish
Mycorrizhae
Sand particles
Soil microorganisms
Soil water
Dry soils are more prone to compaction
Clay soils are easily compacted
Wet soils are less prone to compaction
Sandy soils are easily compacted
Result in poor soil aeration, negatively impacting root growth and the existence of important soil organisms
Prevent the formation of girdling roots
Be responsible for chemical contamination of soil
All of the above
Horizons
Organic matter
Aggregates
Profiles
A horizon
B horizon
C horizon
None of the above
Solution
Salinity
Solute
Sodicity
Root growth
Freezing and thawing
Burrowing insects and other animals
All of the above
4.0-5.5
6.0-6.5
7.0-7.5
7.5-8.0
Sulfur
OM
Lime
Nitrogen
Soil compaction
Soil amendment
Nutrient leaching
Excessive drainage
1 to 10
0 to 100
-14 to 14
0 to 14
Agregrates are formed, giving the soil a better structure
A high water content will reduce the damaging effects
Total pore space and the percentage of macropores are reduced
Micropores combine to form macropores
Water holding capacity
Permanent wilting point
Field capacity
Maximum infiltration
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