Ren R 441 Solonetzic Soils

  1. diagnostic horizon?
    Bn or Bnt
  2. primary and secondary characteristic structures?
    • primary structure: columnar or prismatic
    • secondary structure: blocky
  3. characteristic consistence?
    hard to very hard
  4. more than _____ exchangeable sodium
    10%
  5. originated from what kind of parent material?
    salinized parent material, probably marine shale (sodium sulfate)
  6. ways that salt accumulate?
    • salinized parent material and regionalized groundwater flow (recharge and discharge areas)
    • salinization by capillary rise (driven by plants through evapotranspiration)
  7. in Alberta, always associated with what kind of clays?
    2:1 expandable clays (montmorillonite)
  8. distribution of solonetzic soils in Canada?
    • interior plains region
    • semiarid to subhumid (P<E) regions
    • Montmorillonite clays in pgm
    • in areas of groundwater discharge
  9. 4 great groups
    • solonetz
    • solodized solonetz
    • solod
    • vertic solonetz
  10. solonetz GG characteristic horizons
    • Ah or Ap
    • Ae < 2cm or no Ae
    • Bn or Bnt
    • Csak
  11. solodized solonetz GG characteristic horizons
    • Ah or Ap
    • Ae > 2cm
    • Bnt
    • Csak
  12. solod GG characteristic horizons
    • Ah or Ap
    • Ahe
    • AB
    • Bnt
    • Csak
  13. vertic solonetz GG characteristic horizons
    • Ah or Ap
    • Bnt
    • CssĀ 
  14. soil forming factors related to genesis: climate
    evapotranspiration > precipitation
  15. soil forming factors related to genesis: organism
    edaphic control of vegetation (vegetation controlled by the soil it is formed under)
  16. soil forming factors related to genesis: relief
    • low relief
    • water table close to surface
  17. soil forming factors related to genesis: PGM
    • marine shale
    • contains Na and montmorillonite
    • texture finer than sandy loam
  18. soil forming factors related to genesis: time
    ~ 7000 yrs
  19. stages of development
    • 1. initial salinization
    • 2. solonization
    • 3. solodization
  20. 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
  21. management options for solonetz
    • drainage
    • seedbed preparation
    • fertilizer
    • organic matter
    • forage crops
  22. C horizon mineral characteristics?
    usually calcareous with salt accumulations
  23. major salt?
    • sodium sulfate (Na2SO4)
    • sometimes gypsum (Ca2SO4)
Author
hcunning
ID
324590
Card Set
Ren R 441 Solonetzic Soils
Description
solonetzic soils
Updated