Volume 22, Issue 4 (Winter 2019)                   jwss 2019, 22(4): 173-188 | Back to browse issues page


XML Persian Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Shakeri S, Abtahi S A. Origin and Clay Minerals Characteristics and their Relationship with Potassium Forms in the Calcareous Soils of Kakan Plain in East of Kohgilouye-va-Boyerahmad Province. jwss 2019; 22 (4) :173-188
URL: http://jstnar.iut.ac.ir/article-1-3477-en.html
1. Department of Agriculture, Payame Noor University (PNU), Tehran, Iran. , Shakeri@pnu.ac.ir
Abstract:   (7472 Views)
This research was carried out to assess the origin and clay minerals characteristics and their relationship with potassium forms in the calcareous soil of this region, with the humid climate conditions. Based on aerial photos and topographic maps, physiographic units were separated and soil sampling was done in each diagnostic horizon. The results showed that smectite was the main and dominant clay mineral in the study area. In well-drained pedons, the convincing process for smectite abundance seemed to be mainly the transformation of palygorskite and mica. According to the results, the exchangeable potassium in the surface horizon was higher than that of the subsurface horizons. The main reason for the higher level of exchangeable K in the soil surface, was more smectite and organic carbon. The results revealed that unlike exchangeable and non-exchangeable K, because of the suitable conditions like temperature and humidity in surface horizons, the relative mean of structural K in the surface soils was less than that in the subsurface. Also, since an increase in calcium carbonate resulted in a decrease in amount of clay and the amount of relative clay minerals (dilution effect), the amounts of exchangeable, non- exchangeable and structural K were decreased.
Full-Text [PDF 608 kb]   (2211 Downloads)    
Type of Study: Research | Subject: Ggeneral
Received: 2017/03/9 | Accepted: 2018/01/24 | Published: 2019/03/15

Add your comments about this article : Your username or Email:
CAPTCHA

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

© 2024 CC BY-NC 4.0 | JWSS - Isfahan University of Technology

Designed & Developed by : Yektaweb