Flashcards
Untitled
Cards in this deck (29)
- 1What % of organic matter needs to be in soil to be classified as "Organic Soil"?30%
- 2What is soil texture made up of?Sand, Silt, and Soil
- 3A soil sample contains 35% silt and 35% clay. What is the closest textural class?Clay loam
- 4A soil sample contains 25% silt and 65% sand. What is the closest textural class?Sandy Loam
- 5A soil sample contains 30% clay and 35% silt. What is the sand content of this soil?35%
- 6True or False Sand particles are chemically active while clay particles are notFalse
(its the opposite)
Clay particles are chemically active while sand particles are no - 7True or False By volume clay particles have a very large surface area in comparison to silt and sandTrue
- 8True or False Clay particles act as a nutrient storehouse for soils because they have a small surface area by volumeFalse
Clay particles have a very large surface area - 9True or False Negative charges on the surface of clay particles allow soils to "hang on" to soil nutrientsTrue
- 10True or False The soil textural triangle is used to reflect the percentages of sand, silt and organic matter in a soilFalse
Reflects the % of sand, silt and clay - 11Formation of water stable aggregates comprised of sand, silt and clay refers to a soil's:Structure
- 12What are typical factors in the development of soil structure?Freeze and thaw cycles
Wetting and drying cycles
&
Soil tillage - 13What is not a typical factor in soil structure?Soil nutrients
- 14What is a typical characteristic of an ideal soil structure?Water Stable
Porous
&
Variable in size - 15What is NOT a characteristic of an ideal soil structure?Erodible
- 16______________ No observable aggregationStructureless
- 17_____________ Particles arranged around a pointBlock like
- 18______________ Particles arranged around a horizontal planePlate like
- 19______________ Particles arranged around a vertical axisPrism like
- 20Soil compaction is characterized by?The presence of a plow pan,
large soil aggregates if cultivated when wet,
soil is hard to dig - 21What is a solution to a soil compaction problem?Subsoiling
Modifying tillage practices
&
Growing deep rooted perennial crops - 22What is NOT a solution to a soil compaction problem?Addition of inorganic fertilizer
- 23Soil colour can be an indicator of a number of different soil conditions. What is NOT associated with soil colour?Soil pH
- 24_____________ Soil formed under short grass prairiesBrown soil zone
- 25What soil zone is: ________________ Soils formed under long grass prairiesDark Brown Soil Zone
- 26What soil zone is: ______________ Soil formed under parkland conditionsBlack soil zone
- 27What soil zone is: ____________ Soils formed under primarily forest coverGray soil zone
- 28The colour of soil can be given a specific description, with a standard format, using the Munsell Colour Chart. The following is and example of a colour descriptor used to describe Canadian soils using the Munsell Colour system..... 10YR 7/2. Identify the order of the information presented in the example of the descriptor used in the questionHue, Value, Chroma
- 29Colour: Brown to black soil surface What are the Conditions & Soil Productivity Interpretation ?Conditions:
Well drained soils mainly under grassland environments
Soil Productivity Interpretation:
Good potential for full range of crops
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- Flashcards on Untitled, created by danilmacdonald24 on 01/03/2015.
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- danilmacdonald24
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