Ren R 441 Solonetzic Soils

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diagnostic horizon?

Bn or Bnt
primary and secondary characteristic structures?
- primary structure: columnar or prismatic
- secondary structure: blocky
characteristic consistence?

hard to very hard
more than _____ exchangeable sodium

10%
originated from what kind of parent material?

salinized parent material, probably marine shale (sodium sulfate)
ways that salt accumulate?
- salinized parent material and regionalized groundwater flow (recharge and discharge areas)
- salinization by capillary rise (driven by plants through evapotranspiration)
in Alberta, always associated with what kind of clays?

2:1 expandable clays (montmorillonite)
distribution of solonetzic soils in Canada?
- interior plains region
- semiarid to subhumid (P<E) regions
- Montmorillonite clays in pgm
- in areas of groundwater discharge
4 great groups
- solonetz
- solodized solonetz
- solod
- vertic solonetz
solonetz GG characteristic horizons
- Ah or Ap
- Ae < 2cm or no Ae
- Bn or Bnt
- Csak
solodized solonetz GG characteristic horizons
- Ah or Ap
- Ae > 2cm
- Bnt
- Csak
solod GG characteristic horizons
- Ah or Ap
- Ahe
- AB
- Bnt
- Csak
vertic solonetz GG characteristic horizons
- Ah or Ap
- Bnt
- Css
soil forming factors related to genesis: climate

evapotranspiration > precipitation
soil forming factors related to genesis: organism

edaphic control of vegetation (vegetation controlled by the soil it is formed under)
soil forming factors related to genesis: relief
- low relief
- water table close to surface
soil forming factors related to genesis: PGM
- marine shale
- contains Na and montmorillonite
- texture finer than sandy loam
soil forming factors related to genesis: time

~ 7000 yrs
stages of development
- 1. initial salinization
- 2. solonization
- 3. solodization
challenges in management of solonetz
- large variability in depth of topsoil, fertility, subsoil characteristics
- poor soil structure, porosity, aeration, and water holding capacity in the root zone
management options for solonetz
- drainage
- seedbed preparation
- fertilizer
- organic matter
- forage crops
C horizon mineral characteristics?

usually calcareous with salt accumulations
major salt?
- sodium sulfate (Na2SO4)
- sometimes gypsum (Ca2SO4)

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Author

hcunning

324590

Card Set

Ren R 441 Solonetzic Soils

Description

solonetzic soils

Updated

2016-10-24T14:18:49Z

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