scholarly journals Soil Carbon Stock and Particle Size Fractions in the Central Amazon Predicted from Remotely Sensed Relief, Multispectral and Radar Data

2017 ◽  
Vol 9 (2) ◽  
pp. 124 ◽  
Author(s):  
Marcos Ceddia ◽  
Andréa Gomes ◽  
Gustavo Vasques ◽  
Érika Pinheiro
Keyword(s):  
Particle Size ◽  
Soil Carbon ◽  
Carbon Stock ◽  
Radar Data ◽  
Remotely Sensed ◽  
Size Fractions ◽  
Central Amazon ◽  
Soil Carbon Stock ◽  
Particle Size Fractions

DISTRIBUTION OF CARBON, NITROGEN, SULPHUR AND PHOSPHORUS IN PARTICLE-SIZE SEPARATES FROM GLEYSOLIC SOILS

1980 ◽  
Vol 60 (4) ◽  
pp. 783-786 ◽  
Author(s):  
A. A. HINDS ◽  
L. E. LOWE
Keyword(s):  
Particle Size ◽  
Soil Carbon ◽  
Organic P ◽  
Soil N ◽  
Dispersion Method ◽  
Ultrasonic Dispersion ◽  
Soil Material ◽  
Size Fractions ◽  
Particle Size Fractions ◽  
Fine Clay

Levels of C, N, S and organic P (Po) were determined in fine, medium and coarse clay- and silt-size separates obtained from five Gleysolic soils by an ultrasonic dispersion method. Contents of C, N, S and Po increased with decreasing particle size, with average C values increasing from 3.7% in the silt to 10.1% in fine clay fractions. The corresponding increases for N, S and Po were 0.26–1.17%, 0.037–0.178% and 0.043–0.172%, respectively. C/N and C/S ratios decreased with decreasing particle size, indicating a relative enrichment of N and S in the finer particle-size fractions. N/S showed little variation with particle size, while C/Po ratios were erratic. The three clay fractions accounted on average for 31.3% of the soil material, and for 39.1% of soil carbon. In contrast, the clay fractions together accounted on average for 52–59% of soil N, S and Po.

scholarly journals Geochemical Fingerprint and Soil Carbon of Sandy Alfisols

Soil Systems ◽  
2019 ◽  
Vol 3 (3) ◽  
pp. 59 ◽  
Author(s):  
Jenifer L. Yost ◽  
Eric E. Roden ◽  
Alfred E. Hartemink
Keyword(s):  
Particle Size ◽  
Soil Carbon ◽  
Soil Depth ◽  
Soil Carbon Storage ◽  
Size Fractions ◽  
Particle Size Fractions ◽  
Weathering Indices ◽  
Geochemical Fingerprint ◽  
High Concentrations ◽  
Carbon Concentrations

Soil carbon storage is affected by particle-size fractions and Fe oxides. We assessed soil carbon concentrations in different particle-size fractions, determined the soil chemical composition of the soil, and weathering and mineralogy of sandy soils of the Wisconsin Central Sands, USA. Three land uses were studied (agriculture, forest, and prairie). The soils contained a minimum of 830 g sand kg−1 up to 190 cm soil depth. Approximately 46% of the sand was in the 250–500 μm fraction, and 5% was <125 μm. Soil carbon ranged from 5 to 13 g kg−1 in the topsoil, and decreased with depth. The <45 μm fraction tended to have high concentrations of carbon, ranging from 19 to 43 g kg−1 in the topsoil. Silicon content was over 191 g Si kg−1, and was lowest in the Bt horizons (191–224 g Si kg−1). Up to 29 g Fe kg−1 and 39 g Al kg−1 were present in the soil, and were highest in the Bt horizons. These soils were mostly quartz, and diopside was found throughout the soil profiles. Weathering indices, such as the Ruxton Ratio, showed that the C horizons were the least weathered and the Bt horizons were more weathered. We conclude that most of the carbon in these soils is held in the <45 μm fraction, and soil carbon and total Fe were lowest in the coarser size fractions.

Data synthesis of carbon distribution in particle size fractions of tropical soils: Implications for soil carbon storage potential in croplands

Geoderma ◽  
2018 ◽  
Vol 313 ◽  
pp. 41-51 ◽  
Author(s):  
Kenji Fujisaki ◽  
Lydie Chapuis-Lardy ◽  
Alain Albrecht ◽  
Tantely Razafimbelo ◽  
Jean-Luc Chotte ◽  
...  
Keyword(s):  
Particle Size ◽  
Soil Carbon ◽  
Carbon Storage ◽  
Tropical Soils ◽  
Soil Carbon Storage ◽  
Carbon Distribution ◽  
Data Synthesis ◽  
Size Fractions ◽  
Particle Size Fractions ◽  
Storage Potential

Spatial variability of soil carbon stock in the Urucu river basin, Central Amazon-Brazil

2015 ◽  
Vol 526 ◽  
pp. 58-69 ◽  
Author(s):  
Marcos Bacis Ceddia ◽  
André Luis Oliveira Villela ◽  
Érika Flávia Machado Pinheiro ◽  
Ole Wendroth
Keyword(s):  
Spatial Variability ◽  
Soil Carbon ◽  
River Basin ◽  
Carbon Stock ◽  
Central Amazon ◽  
Soil Carbon Stock
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