Soil aggregate stability and 13C CP/MAS-NMR assessment of organic matter in soils influenced by forest wildfires in Çanakkale, Turkey

Geoderma ◽  
2005 ◽  
Vol 129 (3-4) ◽  
pp. 219-229 ◽  
Author(s):  
Y. Kavdır ◽  
H. Ekinci ◽  
O. Yüksel ◽  
A.R. Mermut
Keyword(s):  
Organic Matter ◽  
Aggregate Stability ◽  
Soil Aggregate ◽  
Mas Nmr ◽  
Soil Aggregate Stability ◽  
Cp Mas Nmr ◽  
13C Cp Mas Nmr ◽  
Forest Wildfires

Improvements in aggregate stability of sediments supplemented with tea waste and farmyard manure

2016 ◽  
Vol 6 ◽  
Author(s):  
Bülent Turgut ◽  
Bahtiyar Köse
Keyword(s):  
Organic Matter ◽  
Incubation Period ◽  
Farmyard Manure ◽  
Aggregate Stability ◽  
Soil Aggregate ◽  
Structural Stabilization ◽  
Soil Aggregate Stability ◽  
Controlled Conditions ◽  
Tea Waste ◽  
Wet Sieving

The influence of organic matter amendments on soil aggregate stability is well known, but the corresponding changes in recently deposited sediment are not well documented. In this study, improvements in aggregate stability of recently deposited sediment (RDS) supplemented with farmyard manure (FYM) and tea waste (TW) were evaluated during an 18-week incubation period under controlled conditions. FYM and TW were applied to RDS at different rates (0%, 2.5%, 5%, 7.5%, 10%, 12.5% and 15% w/w), and aggregate stability was determined at different times of incubation (2<sup>nd</sup>, 4<sup>th</sup>, 6<sup>th</sup>, 8<sup>th</sup>, 10<sup>th</sup>, 14<sup>th</sup>, and 18<sup>th</sup> weeks) using wet sieving analysis. The results showed that the aggregate stability of RDS treated with TW was statistically significantly higher than those of samples treated with FYM. Aggregate stability increased with increasing rates of both FYM and TW. Aggregate stability reached the highest value at the end of the second week in FYM treated samples, and declined within the following incubation period. However, in the samples treated with TW, aggregate stability reached the highest value at the end of the eighth week. Since the results of this study clearly indicated that tea waste and farmyard manure input significantly increased the aggregate stability of RDS, it is suggested that TW and FYM could be used for structural stabilization of degraded soils.

Comparison of aggregate stability within six soil profiles under conventional tillage using various laboratory tests

Biologia ◽  
2009 ◽  
Vol 64 (3) ◽  
Author(s):  
Radka Kodešová ◽  
Marcela Rohošková ◽  
Anna Žigová
Keyword(s):  
Organic Matter ◽  
Soil Aggregates ◽  
Organic Matter Content ◽  
Aggregate Stability ◽  
Clay Content ◽  
Soil Aggregate ◽  
Matter Content ◽  
The Other ◽  
Structure Stability ◽  
Soil Aggregate Stability

AbstractSoil structure stability was studied in every diagnostic horizons of six soil types (Haplic Chernozem, Greyic Phaeozem, two Haplic Luvisols, Haplic Cambisol, Dystric Cambisol) using different techniques investigating various destruction mechanisms of soil aggregates. Soil aggregate stability, assessed by the index of water stable aggregates (WSA), varied depending on the organic matter content, clay content and pHKCl. The presence of clay and organic matter coatings and fillings, and presence of iron oxides in some soils increased stability of soil aggregates. On the other hand periodical tillage apparently decreased aggregate stability in the Ap horizons. Coefficients of aggregate vulnerability resulting from fast wetting (KV 1) and slow wetting (KV 2) tests showed similar trends of the soil aggregate stability as the WSA index, when studied for soils developed on the similar parent material. There was found close correlation between the WSA index and the KV 1 value, which depended also on the organic matter content, clay content and pHKCl. Less significant correlation was obtained between the WSA index and the KV 2 value, which depended on the organic matter content and clay content. Coefficients of vulnerability resulting from the shaking after pre-wetting test (KV 3) showed considerably different trends in comparison to the other tests due to the different factors affecting aggregate stability against the mechanical destruction. The KV 3 value depended mostly on cation exchange capacity, pHKCl and organic matter content.

Soil aggregate stability and organic matter as affected by land-use change in central Iran

2017 ◽  
Vol 63 (13) ◽  
pp. 1823-1837 ◽  
Author(s):  
Eftekhar Baranian Kabir ◽  
Hossein Bashari ◽  
Mohammad Reza Mosaddeghi ◽  
Mehdi Bassiri
Keyword(s):  
Land Use ◽  
Organic Matter ◽  
Land Use Change ◽  
Aggregate Stability ◽  
Soil Aggregate ◽  
Central Iran ◽  
Soil Aggregate Stability
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