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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
CssĀ
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
ID
324590
Card Set
Ren R 441 Solonetzic Soils
Description
solonetzic soils
Updated
2016-10-24T14:18:49Z
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