The study of particle size distribution of calcium carbonate and its effects on some soil properties in khuzestan province
Publish place: Iran Agricultural Research، Vol: 36، Issue: 2
Publish Year: 1396
نوع سند: مقاله ژورنالی
زبان: English
View: 128
This Paper With 10 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_IAR-36-2_010
تاریخ نمایه سازی: 7 شهریور 1402
Abstract:
ABSTRACT-This experiment was carried out to study particle size distribution (PSD) of carbonates in soils and its effect on some calcareous soil properties in Khuzestan Province, Iran. Soil samples (n=۷۲) were collected from different regions. To evaluate the effect of carbonates on water contents at pressure head of -۱۵۰۰kpa and PSD of soil samples, these properties were determined before and after removing their calcium carbonate. Based on the results, removal of CaCO۳ led to a change in PSD in all the samples and ۷۰% of those changed textural class. Carbonates were most accumulated in clay and sand size in Abadan region while they were accumulated in silt and sand fractions in other areas. Also, evaluation of moisture retention at permanent wilting point (PWP) showed that this feature has been reduced in all samples after removal of carbonates. Following these changes, verification of key to soil taxonomy equation [Clay%= ۲.۵(% water retained at -۱۵۰۰ kPa tension-%organic carbon)] in calcareous soils of Khuzestan Province showed that this equation can be used with high reliability in calcareous soils of Abadan, Karoon, Haft-Tape agro-industries. However, this equation is not valid in Amir-Kabir and Debal-Khozaiea gro-industries. Our fitted equation [Clay % = (۴.۳۵*% water retained at -۱۵۰۰ kPa tension +۳۵.۳* % organic carbon)] has high reliability in predicting clay content in non-carbonate samples. This result suggests that the presence of carbonates and its distribution in soil particle size is an important factor in the variability of soil properties at arid and semiarid areas.
Keywords:
Authors
N. Asgari Hafshejani
Department of Soil Science, Ramin University of Agriculture and Natural Resources, Ahvaz University,Ahvaz, I.R. Iran
S. Jafari
Department of Soil Science, Ramin University of Agriculture and Natural Resources, Ahvaz University,Ahvaz, I.R. Iran
مراجع و منابع این Paper:
لیست زیر مراجع و منابع استفاده شده در این Paper را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود Paper لینک شده اند :