Relationship of structural stability of surface soils with soil and climate properties in Isfahan province
Abstract:
Soil structure is a key factor in soil functioning and its ability to moderate environmental quality. Aggregate stability is used as an indicator of soil structure. The objective of this study was to determine the most important factors affecting topsoil aggregate stability in Isfahan Province. Based on the geological map, 252 soil samples were collected from the 0–20 cm depth on a 20×20 km network. Stability of large aggregates was measured using the wet-sieving method, and mean weight diameter (MWD), geometric mean diameter (GMD) and percent of water-stable aggregates (WSA) were calculated. Some soil physical and chemical properties including texture, organic matter, carbonates, gypsum, pH, EC and SAR were also determined. The impacts of different properties on aggregate stability were evaluated using correlation and stepwise multiple linear regression analyses. Results showed that the highest correlations belonged to GMD, indicating aggregate-size distribution was predominantly log-normal in the studied soils. The correlation analysis showed that gypsum content has a significant influence on aggregate stability, whereas EC, SAR and silt content are among the important soil properties negatively affecting soil structural stability. In general, structure of the soils in Isfahan Province is unstable and erodible when compared to soils in semi-humid and humid regions. Arid and semi-arid climate and low age of the soils (i.e., early stages of genesis) could hinder structure formation and stability in the studied soils.
Language:
Persian
Published:
Soil Management Journal, Volume:3 Issue: 2, 2016
Page:
23
magiran.com/p1520612  
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یک‌ساله به مبلغ 990,000ريال می‌توانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
  • حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران می‌شود.
  • پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانه‌های چاپی و دیجیتال را به کاربر نمی‌دهد.
دسترسی سراسری کاربران دانشگاه پیام نور!
اعضای هیئت علمی و دانشجویان دانشگاه پیام نور در سراسر کشور، در صورت ثبت نام با ایمیل دانشگاهی، تا پایان فروردین ماه 1403 به مقالات سایت دسترسی خواهند داشت!
In order to view content subscription is required

Personal subscription
Subscribe magiran.com for 50 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!