Soil mineral structural water loss during loss on ignition analyses

2009 ◽  
Vol 89 (5) ◽  
pp. 603-610 ◽  
Author(s):  
H Sun ◽  
M Nelson ◽  
F Chen ◽  
J Husch
Keyword(s):  
Organic Matter ◽  
Soil Sample ◽  
Water Loss ◽  
Mineral Water ◽  
Surface Soil ◽  
Soil Samples ◽  
Loss On Ignition ◽  
Soil Mineral ◽  
Structural Water ◽  
X Ray

Water loss from soil minerals has been known to cause errors in the determination of soil organic matter when the loss on ignition (LOI) method is used. Unfortunately, no known published studies reliably quantify the range of structural water in the soil. To do this, 15 common reference minerals were analyzed by LOI to obtain their individual water loss. In addition, 14 upland, loamy soil samples and 3 wetland/hydric soil samples with varied mineral contents were analyzed to collect their X-ray powder diffraction spectra. Based upon X-ray spectra peak intensities, the modal abundance of minerals in each soil sample was determined using the RockJock computer program. The resultant modal weight percentages of all identified minerals in each soil sample were then multiplied by the LOI value for each mineral to obtain the mineral structural water loss (SWL) of that soil sample. For the 17 soil samples analyzed, the range of mineral water loss is 0.56 to 2.45%. Depending on the LOI values of the soil samples, the SWL:LOI ratios range from 0.04 to around 1.00. The SWL:LOI ratios are particularly low for top wetland soil when the LOI value is higher. The ratios are lower for surface soil samples than for subsurface soil samples because of the high LOI values in surface soil samples. Understanding soil mineral water loss and its relation to the LOI patterns from various environments is important for the accurate evaluation of soil organic matter when the LOI method is used. Key words: Mineral, structural water, loss on ignition

scholarly journals Relationship between the mass of organic matter and carbon in soil

2008 ◽  
Vol 51 (2) ◽  
pp. 263-269 ◽  
Author(s):  
Silmara R. Bianchi ◽  
Mario Miyazawa ◽  
Edson L. de Oliveira ◽  
Marcos Antonio Pavan
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Organic Carbon ◽  
Soil Depth ◽  
Soil Surface ◽  
Soil Samples ◽  
Loss On Ignition ◽  
Oxidation Degree ◽  
Wide Range

The quantity of soil organic matter (SOM) was estimated through the determination of soil organic carbon (SOC) times a factor, which assumes that 58% of the SOM was formed by carbon. A number of soil samples with wide range of SOC content collected in the state of Paraná, Brazil were evaluated in the laboratory. SOC was measured by Walkley-Black method and the total SOM by loss on ignition. The SOC was positively correlated with SOM. The SOM/SOC ratio varied from 1.91 to 5.08 for the soils. It shows that Brazilian SOM has greater oxidation degree. Although, the SOM and SOC decreased with soil depth the SOM/SOC ratio increased. It showed that SOM in the subsoil contained more oxygen but less carbon than the SOM in the upper soil surface. The CEC/SOC also increased with depth indicating that the functional groups of the SOM increased per unity of carbon.

Studies of Soil Mineral-Organic Matter Associations and Plant Nutrient Fixation Using Synchrotron X-ray Methods

2021 ◽  
Author(s):  
Tamas Varga ◽  
Ravi Kukkadapu ◽  
Alice Dohnalkova ◽  
Libor Kovarik ◽  
Matthew Marcus ◽  
...  
Keyword(s):  
Organic Matter ◽  
Plant Nutrient ◽  
Soil Mineral ◽  
X Ray ◽  
Ray Methods

scholarly journals LEAVING SUGARCANE TRASH UNDISTURBED ON A LATERIC SOIL COMPARES FAVORABLY WITH CURRENTLY USED TRASH-DISPOSAL METHODS

1969 ◽  
Vol 38 (1) ◽  
pp. 1-8
Author(s):  
P. Landrau, Jr. ◽  
M. A. Lugo-López ◽  
G. Samuels ◽  
S. Silva
Keyword(s):  
Organic Matter ◽  
Puerto Rico ◽  
Surface Soil ◽  
Drainage Water ◽  
Soil Samples ◽  
Lateritic Soil ◽  
Infiltration Capacity ◽  
Moisture Evaporation ◽  
Long Run ◽  
Evaporation Losses

The production of sugar was not influenced by the various methods of handling sugarcane trash (aligning, aligning and furrowing, leaving undisturbed, or burning) on a field of Coto clay, a highly permeable lateritic soil at Isabela in northwestern Puerto Rico. No significant differences due to treatments were observed in organic-matter or nitrogen content, pH, C/N ration, permeability, quick drainage, water retained at various tensions, bulk density, or porosity, determined from soil samples taken after harvesting the sixth crop. The minimum infiltration capacity of the soils from the plots where the trash was burned or undisturbed was moderate, while that of the soils where the trash was aligned, or aligned and the clean banks furrowed, was moderately rapid. The yields from plots where the trash was left undisturbed over the surface were as high as those where it was either burned, aligned, or aligned and the clean banks furrowed. Trash disposal is generally expensive. By leaving the trash undisturbed, cultivation costs can be reduced considerably. Weeds are usually smothered under the trash. In areas where drainage problems are not very acute, it may prove economically advantageous in the long run to follow this practice. Furthermore, direct moisture-evaporation losses from the soil will probably be reduced by mulching the whole surface soil.

scholarly journals COMPARISON BETWEEN ORGANIC MATTER CONTENT OF MAIN SOIL ORDERS IN KURDISTAN REGION USING TWO DIFFERENT METHODS.

2020 ◽  
Vol 51 (Special) ◽  
Author(s):  
Khoshnaw & Esmail
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Linear Equation ◽  
Organic Matter Content ◽  
Combustion Method ◽  
Matter Content ◽  
Soil Samples ◽  
Kurdistan Region ◽  
Loss On Ignition ◽  
Dry Combustion

This study was conducted to compare between two methods of soil organic matter determination for main soil orders in Kurdistan region/Iraq, for this purpose forty-five soil samples were taken then the organic matter was determined using chemical (Walkley-Black (wet) method and loss-on-ignition method (dry) combustion method. The results indicated the significant correlation (r = 0.88**) between the studied methods It means there is good adjustment to convert organic matter by loss-on-ignition method (dry) to Walkley-Black (wet) method organic matter by this linear equation (organic matter by loss-on-ignition =1.651* Walkley-Black method organic matter +2.1877) this equation can be used to convert organic matter by two methods for Mollisols(M), Vertisols(V) and Aridisols(A) in Hawler(H), Sulaimani(S) and Duhok(D) governorates, this equation is very important and economic to determine and convert dry method to wet method, the amount of organic matter for M, V, A was recorded the highest value (49.5, 24.8, 20 gkg-1) respectively for Mollisols, Vertisols, and Aridisols at Hawler (H), Sulaimani (S), and Duhok(D) respectively for (DM5, SV4, DA1) in Duhok Mollisols, Sulaimani Vertisols and Duhok Aridisol respectively for walk- black (wet) method, the highest value for dry method organic matter in Mollisols, Vertisols, Aridisols was recorded (97.6, 77.9, 50.3 g kg-1) for soil orders (MD3, VD4, AD4) respectively.

Relationship between soil chemical characteristics and soil-borne fungi in tomato tunnels of Punjab, Pakistan

2019 ◽  
Vol 48 (3) ◽  
pp. 409-416
Author(s):  
Arshad Javaid ◽  
Freeha Anjum ◽  
Rashid Mahmood ◽  
Naureen Akhtar
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Soil Sample ◽  
Soil Ph ◽  
Pathogenic Fungi ◽  
Fungal Species ◽  
Soil Samples ◽  
Chemical Characteristics ◽  
Solanum Lycopersicum L ◽  
Soil Borne Fungi

Soil pH, ECe, N, K, P and organic matter in 12 soil samples collected from different tomato (Solanum lycopersicum L.) tunnels were in the range of 7.7 - 8.3, 0.40 - 2.45 dS/cm, 0.02 - 0.10%, 40 - 282 ppm, 12 - 123 ppm and 0.42 - 2.02%, respectively. A total of 20 fungal species belonging to ten genera, namely Aspergilus, Alternaria, Cladosporium, Drechslera, Emericella, Fusarium, Mortierella, Mucor, Penicillium and Sclerotium were isolated from the soil samples using direct and dilution plate techniques. Total number of fungal colonies ranged from 450 - 2700/g soil in different soil samples. Among these, number of colonies of saprophytic and pathogenic fungi were 432 - 2070 and 10 - 954/g soil sample, respectively. Number of pathogenic colonies was significantly and positively correlated with soil organic matter and N. The soil organic matter and nitrogen favoured population of pathogenic fungi in tomato tunnels.

Estimating soil organic carbon through loss on ignition: effects of ignition conditions and structural water loss

2015 ◽  
Vol 66 (2) ◽  
pp. 320-328 ◽  
Author(s):  
M. J. J. Hoogsteen ◽  
E. A. Lantinga ◽  
E. J. Bakker ◽  
J. C. J. Groot ◽  
P. A. Tittonell
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Water Loss ◽  
Loss On Ignition ◽  
Structural Water

scholarly journals Mobilization of particulate organic matter and minerals in Zackenberg valley, Greenland

2021 ◽  
Author(s):  
Lisa Bröder ◽  
Catherine Hirst ◽  
Sophie Opfergelt ◽  
Julie Lattaud ◽  
Negar Haghipour ◽  
...  
Keyword(s):  
Organic Matter ◽  
Particulate Organic Matter ◽  
Soil Samples ◽  
Headwater Stream ◽  
Decay Kinetics ◽  
X Ray ◽  
Additional Information ◽  
Permafrost Thaw ◽  
Permafrost Soils ◽  
Retrogressive Thaw Slump

<p>Ongoing warming of the Northern high latitudes has intensified abrupt thaw processes throughout the permafrost zone. The resulting terrain disturbances are prone to release large amounts of particulate organic matter (OM) from deeper permafrost soils with thus far poorly constrained decay kinetics. Organo-mineral interactions may inhibit OM decomposition, thereby mediating the release of carbon to the atmosphere. Yet how these interactions evolve upon release and during transport along the fluvial continuum is still insufficiently understood. Here we investigate the mobilization of particulate OM from disturbed permafrost soils to the aquatic environment in the Zackenberg watershed in Northeastern Greenland. We collected soil samples in a thermo-erosion gully and a retrogressive thaw slump, as well as suspended solids and stream sediments along the glacio-nival Zackenberg River, including its tributaries, and a small headwater stream (Grænselv) affected by abrupt permafrost thaw. To evaluate the organic and mineral material transported, we compare mineral element and organic carbon (OC) concentrations, bulk carbon isotopes (<sup>13</sup>C and <sup>14</sup>C), together with source-specific molecular biomarkers (plant-wax lipids and branched glycerol dialkyl glycerol tetraethers, brGDGTs) for the suspended load with their soil and sediment counterparts.</p><p>Preliminary results show large contrasts in OC concentrations as well as Δ<sup>14</sup>C between the glacio-nival river and the headwater stream, as well as between the different thaw features. The retrogressive thaw slump mobilizes relatively OC-poor material with very low Δ<sup>14</sup>C signatures suggesting a petrogenic contribution, while soil samples from the thermo-erosion gully had higher OC concentrations and Δ<sup>14</sup>C values. For Grænselv, Δ<sup>14</sup>C values of the particulate OC were lower close to the eroding stream bank, whereas the Zackenberg main stem displayed fairly constant Δ<sup>14</sup>C values, with some of the Zackenberg tributaries delivering relatively organic-rich particles low in Δ<sup>14</sup>C.</p><p>Molecular biomarker analyses will provide additional information on specific OM sources, while X-ray Diffraction (XRD) and X-ray Fluorescence (XRF) analyses on the soils, sediments and suspended mineral load will give more detailed insights into the composition of the mineral matrices. By combining these analytical methods, we aim to improve our understanding of the interactions between minerals and OM and thereby help to constrain the fate of mobilized OM upon permafrost thaw.</p>

scholarly journals Water contents of glasshouse soils at field capacity and at saturation. 2. Estimating water contents from organic-matter and clay contents or from loss-on-ignition.

1988 ◽  
Vol 36 (3) ◽  
pp. 275-282
Author(s):  
J. van den. Ende
Keyword(s):  
Organic Matter ◽  
Field Capacity ◽  
Soil Samples ◽  
Regression Coefficients ◽  
Regression Equations ◽  
Loss On Ignition ◽  
Independent Variables ◽  
Independent Variable ◽  
Dry Soil ◽  
Water Contents

Water contents of soils at field capacity and at saturation could be accurately estimated with the use of regression equations in which loss-on-ignition was the independent variable. Multiple regression equations in which organic-matter and clay contents were the independent variables did not have a higher predictive value. The regression coefficients in equations for estimating water contents of saturated pastes obtained from air-dry soil samples amount to about 80% of the corresponding coefficients for saturated pastes obtained from field-moist soil samples. The clay fractions were found to contribute much more to the water contents of saturated soil pastes than to those of soils at field capacity. (Abstract retrieved from CAB Abstracts by CABI’s permission)

Relationships between three measures of organic matter or carbon in soils of eucalypt plantations in Tasmania

Soil Research ◽  
1996 ◽  
Vol 34 (4) ◽  
pp. 545 ◽  
Author(s):  
XJ Wang ◽  
PJ Smethurst ◽  
AM Herbert
Keyword(s):  
Organic Matter ◽  
Complete Recovery ◽  
Parent Material ◽  
Wet Oxidation ◽  
Loss On Ignition ◽  
Structural Water ◽  
Parent Materials ◽  
Eucalypt Plantations ◽  
Highly Correlated ◽  
Dry Combustion

Organic carbon or organic matter in acidic Tasmanian soils supporting eucalypt plantations was measured by dry combustion using a LECO CHIN-1000 Analyzer (CT), wet oxidation by the Walkley-Black method (CW&B), and loss-on-ignition (LOI at 375°C). CT and CW&B were highly correlated in 119 surface and subsoil samples, and on average, CW&B provided near complete recovery of CT (97%). Although LOI may have released some structural water from the fine-textured soils, and apart from granite-derived soils which need further study, strong regressions were found between LOI and both CW&B and CT which were specific for either basalt or non-basalt soils. Within the non-basalt soils, parent material had little effect on these relationships, although there were large differences in C concentrations of surface soils between soils of different parent materials. The relationships of CW&B and CT to LOI in the basalt soils were significantly different from those in the non-basalt soils.

Extraction Methods Study and Structure Analysis of Humic Acid in Surface Soil along Main Transportation Road

2012 ◽  
Vol 518-523 ◽  
pp. 201-204
Author(s):  
Yue Jin Zhang ◽  
Juan Wang
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Surface Soil ◽  
Ph Value ◽  
Organic Matter Content ◽  
Extraction Methods ◽  
Matter Content ◽  
Soil Samples ◽  
Sorption Ability ◽  
Scanning Electron

The five surface soil samples were collected in along zhonghuan road of Jiaxing city. According to different solubility in acid and alkali solution, the soil organic matters were divided into different kinds of components such as fulvic acid, humic acid and Humin. Both humic acid and minerals were extracted by sequence and the images were displayed in assistance of scanning electron microscope. Different extraction time and extraction conditions were optimized and the methods were established in the last. Correlations between organic matter content, pH value and contents of HA were fitted and a linear relationship was found between OM and HA. On the help of SEM, different structure of HA and minerals were found that images of HA were columnar and that of mineral were Massive. It is just the reason that why the OM has great sorption ability than the minerals.

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