Soil Identification Fill-in
- Identification is based upon the __________ ______________________________.
- Soils develop horizons
- recognizably different ____________________ that are parallel to the surface
- Horizons form :
- because of differences in ___________________
- accumulation of ______________________ __________________________
- movement of ______________________ __________________________
- horizons form the __________ ______________________________
- There are currently about _________________ defined soils in the ________________________.
- Soils are usually named for the first location where they were sampled and __________________.
- On Whidbey Island we have _______ unique soils.
Examples of Whidbey Soils Name Parent material Ave. bushels of wheat/acre _____________ loam marine or lake sediments 65 Hoypus loamy ___________ glacial gravelly drift 10 Lummi silt ___________ marine sediments n/a Puget ___________ loam fine textured stream deposits 55 Whidbey ___________ loam cemented gravelly till 18
- Identifying the soil will determine __________ ______________________ _______________ (BMP) for that soil.
- Texture is an important _______________________ property (other properties are color, structure, density).
- Texture is the relative _______________________ of sand, silt and clay in a soil.
- When determining soil texture, particles larger than _______________________ are excluded, as is organic matter.
|2.0 - 0.05||round or irregularly shaped, not sticky or plastic, low water holding ability|
|0.05 - 0.002||irregular shaped, plastic and cohesive|
|< 0.002||usually plate-like, sticky and plastic, high surface area to mass ratio, high water holding ability, greatly influences soil properties|