Flashcards
SOILS B1-B3
Cards in this deck (26)
- 1A soil needs to have a minimum of ____ % of organic matter by weight to be classified as an organic soil rather than a mineral soil30%
- 2Soil texture is defined as the percentage ofsand silt and clay
- 3A soil sample contains 35% silt and 35% clay. what is the textural classclay loam
- 4A soil sample contains 25% silt and 65% sand. What is the closest textural classSandy loam
- 5A soil sample contains 30% clay and 35% silt. What is the sand content of this soil35%
- 6Complete the following soil texture chart: Soil separate "dry feel" Clayey Sandy SiltyHard and sticky
Loose and gritty
Powdery and slippery - 7Complete the following chart on "the relationship between textural class and basic productivity factors" Coarse Medium FinePoor poor very susceptible to wind erosion
Moderate moderate fairly stable under good management
High high highly susceptible to wind & water erosion - 8Sand particles are chemically active while clay particles are notfalse - the opposite is true
- 9by volume clay particles have a very large surface area in comparison to silt an sandtrue
- 10clay 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
- 11Negative charges on the surface of clay particles allow soils to "hang on" to soil nutrientsTrue
- 12The soil textural triangle is used to reflect the percentages of sand silt and organic matter in a soilfalse, reflects sand silt and clay
- 13The formation of water stable aggregates comprised of sand silt and clay refers to a soilsstructure
- 14which of the following is not a typical factor in the development of soil structuresoil nutrients
- 15which of the following is not typically a characteristic of an ideal soil structureerodible
- 16structurelessno observable aggregation
- 17block likeparticles arranged around a point
- 18plate likeparticles arranged around a horizontal plane
- 19prism likeparticles arranged around a vertical axis
- 20Soil compaction is characterized bythe presence of a plow pan
large soil aggregates if cultivated when wet
soil is hard to dig - 21which of the following is not typically a solution to a soil compaction problemaddition of inorganic matter
- 22Soil colour can be an indicator of a number of different soil conditions, which of the following is not usually associated with soil colour>soil pH
- 23Brown soil zonesoils formed under short grass prairies
- 24dark brown soil zonesoils formed under long grass prairies
- 25black soil zonesoils formed under parkland conditions
- 26gray soil zonesoils formed under primarily forest cover
Information
- Description
- Flashcards on SOILS B1-B3, created by jaydon.meyers on 02/03/2015.
- Created by
- jaydon.meyers
- Views
- 0
- Rating