Comparison between Walkley-Black and Loss-on-Ignition methods for organic carbon estimation in soil from different locations
Other Title(s)
مقارنة بين طريقتي ولكي بلاك و الفقد بالحرق لتقديرالكربون العضوي في ترب من مواقع مختلفة
Joint Authors
Barwari, Vahel Ismail Hasan
Muhammad, Bakhtiyar Hasan
Hashim, Farhad Ali
Source
Kufa Journal for Agricultural Science
Issue
Vol. 9, Issue 2 (30 Jun. 2017), pp.292-306, 15 p.
Publisher
University of Kufa Faculty of Agriculture
Publication Date
2017-06-30
Country of Publication
Iraq
No. of Pages
15
Main Subjects
Topics
Abstract EN
The present study aims to find out the best method for soil carbon determination using two methods, the wet acidified dichromate oxidation, Walkley-Black (W.B) and loss on ignition (LOI) methods.
This study was employed on 30 soil samples from 0-20cm depth from three Duhok, Irbil and Sulaimaniya of Kurdistan region-Iraq.
The following parameters are analyzed: organic C and the particle size distribution of the soil samples.
The results of LOI and W.B methods were statistically analyzed by simple linear regression equations to interpret their relationship.
The highest values of soil organic carbon (SOC) were found at Loss on ignition method ranged between 4.19 - 29.70 g kg-1 soil, whereas W-B method had the lowest values ranged between 3.0 – 19.0 g kg-1 soil for overall sites.
There was a strong relationship between these two methods, so the amount of SOC using both methods had significantly a very strong correlation (R2=0.
93, p < 0.001), (R2=0.
87, p < 0.0001), (R2=0.
75, p < 0.001) in Sulaimaniya, Duhok and Irbil respectively.
This study also revealed that silty clay and clay soils gave the highest values of the SOC by the two methods compared to the loamy soil.
However, the soils that have more clay and carbonate contents gave higher values of SOC at high temperature using L.O.I technique.
The results of this study revealed that both methods were reliable but W.B method was more accurate and suitable for soils with high clay contents and for the calcareous soils.
Also, LOI is an accurate, if the fine fraction is present in low percentage.
American Psychological Association (APA)
Barwari, Vahel Ismail Hasan& Hashim, Farhad Ali& Muhammad, Bakhtiyar Hasan. 2017. Comparison between Walkley-Black and Loss-on-Ignition methods for organic carbon estimation in soil from different locations. Kufa Journal for Agricultural Science،Vol. 9, no. 2, pp.292-306.
https://search.emarefa.net/detail/BIM-785531
Modern Language Association (MLA)
Barwari, Vahel Ismail Hasan…[et al.]. Comparison between Walkley-Black and Loss-on-Ignition methods for organic carbon estimation in soil from different locations. Kufa Journal for Agricultural Science Vol. 9, no. 2 (2017), pp.292-306.
https://search.emarefa.net/detail/BIM-785531
American Medical Association (AMA)
Barwari, Vahel Ismail Hasan& Hashim, Farhad Ali& Muhammad, Bakhtiyar Hasan. Comparison between Walkley-Black and Loss-on-Ignition methods for organic carbon estimation in soil from different locations. Kufa Journal for Agricultural Science. 2017. Vol. 9, no. 2, pp.292-306.
https://search.emarefa.net/detail/BIM-785531
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 302-305
Record ID
BIM-785531