Effect of freezing and thawing processes on soil aggregate stability

Oztas T., Fayetorbay F.

CATENA, cilt.52, sa.1, ss.1-8, 2003 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 52 Sayı: 1
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1016/s0341-8162(02)00177-7
  • Dergi Adı: CATENA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1-8
  • Anahtar Kelimeler: aggregate stability, freezing-thawing, soil structure, ORGANIC-MATTER
  • Atatürk Üniversitesi Adresli: Evet

Özet

The effect of freezing and thawing on wet aggregate stability of soils formed on different parent materials was determined for different aggregate size groups (0.0-1.0; 1.0-2.0; and 2.0-4.0 mm), different water contents and for various freezing and thawing cycles (three, six and nine times) and freezing temperatures 4 and - 18 degreesC. The initial wet aggregate stability decreased with freeze-thaw(1) treatments by 28.6-51.7% depending on soil type, and was more pronounced with increased moisture contents at freezing. The percent decrease in wet aggregate stability for different aggregate size groups ranged from 13.8% to 57.7%. Wet aggregate stability generally increased when the number of freezing and thawing cycles increased from 3 to 6, but decreased after that point. The percentage of water-stable aggregates in all soils at - 18 degreesC was less than that at - 4 degreesC. (C) 2002 Elsevier Science B.V All rights reserved.