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Journal articles on the topic 'Light fraction organic matter'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Zhang, Futao, Yunfa Qiao, Xiaozeng Han, and Bin Zhang. "Variation of soil organic matter depends on light-fraction organic matter under long-term monocropping of different crops." Plant, Soil and Environment 67, No. 10 (2021): 588–99. http://dx.doi.org/10.17221/350/2021-pse.

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Cultivating crops influences soil organic matter (SOM), but the effect of different crops remains unclear, particularly under long-term monocropping. The objective of this study was to identify how different crops influence the content and chemical structures of SOM under long-term monocropping. Here, soils were sampled (0–20 cm) under 27-year soybean and maize monocropping and separated into different physical fractions. The content and chemical structures of SOM in all fractions were determined. SOM contents were higher under soybean than maize in bulk soil and macroaggregates and their ligh

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2

Golchin, A., JM Oades, JO Skjemstad, and P. Clarke. "Study of free and occluded particulate organic matter in soils by solid state 13C Cp/MAS NMR spectroscopy and scanning electron microscopy." Soil Research 32, no. 2 (1994): 285. http://dx.doi.org/10.1071/sr9940285.

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A simple densimetric method for the separation of free and occluded particulate organic materials was developed and applied to five virgin soils. The free organic matter was isolated by suspending the soil in sodium polytungstate solution (d = 1.6 Mg m-3) and decanting the light material. The remaining soil was disaggregated by sonification for liberation of occluded organic materials. The free light fraction consisted of large, undecomposed or partly decomposed root and plant fragments. This fraction comprised 0.59-4.34% of soil dry weight and accounted for 6.9-31.3% and 5.9-22.1% of total so

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3

Dalal, RC, and RJ Mayer. "Long term trends in fertility of soils under continuous cultivation and cereal cropping in southern Queensland .VI. Loss of total nitrogen from different particle size and density fractions." Soil Research 25, no. 1 (1987): 83. http://dx.doi.org/10.1071/sr9870083.

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The dynamics of total N in particle-size and density fractions of six major soils which have been used for cereal cropping for 20-70 years were studied in order to identify the labile organic matter fractions in soil. For virgin soils, no single particle-size was consistently enriched in N as compared with the whole soil. The clay fraction contained the largest proportion (53% overall) of total N. Silt-size and sand-size N fractions accounted for 26% and 21% of total N, respectively. Upon cultivation, the sand-size fraction lost most of its N (as much as 89% in Langlands-Logie soil). However,

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4

Roscoe, R., P. Buurman, B. van Lagen, and E. Velthorst. "Transformations in occluded light fraction organic matter in a clayey oxisol: evidence from 13C-CPMAS-NMR and delta13C Signature." Revista Brasileira de Ciência do Solo 28, no. 5 (2004): 811–18. http://dx.doi.org/10.1590/s0100-06832004000500003.

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We hypothesised that, during occlusion inside granular aggregates of oxide-rich soils, the light fraction organic matter would undergo a strong process of decomposition, either due to the slow process of aggregate formation and stabilisation or due to digestion in the macro- and meso-fauna guts. This process would favour the accumulation of recalcitrant materials inside aggregates. The aim of this study was to compare the dynamics and the chemical composition of free and occluded light fraction organic matter in a natural cerrado vegetation (woodland savannah) and a nearby pasture (Brachiaria

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5

Gregorich, E. G., C. M. Monreal, and B. H. Ellert. "Turnover of soil organic matter and storage of corn residue carbon estimated from natural 13C abundance." Canadian Journal of Soil Science 75, no. 2 (1995): 161–67. http://dx.doi.org/10.4141/cjss95-023.

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Total organic C and natural C abundance were measured in a forest soil and a soil under corn (Zea mays L.) to assess management-induced changes in the quantity and initial source of organic matter. The total mass of organic C in the cultivated soil was 19% lower than in the forest soil. It was estimated that after 25 yr of continuous corn, 100 Mg C ha−1 was returned to the soil as residues, of which only 23 Mg ha−1 remained in the soil; 88% of the remaining corn-derived C (C4-derived C) was in the plow layer. About 30% of the soil organic C in the plow layer (0–27 cm) was derived from corn. As

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6

Bremer, E., H. H. Janzen, and A. M. Johnston. "Sensitivity of total, light fraction and mineralizable organic matter to management practices in a Lethbridge soil." Canadian Journal of Soil Science 74, no. 2 (1994): 131–38. http://dx.doi.org/10.4141/cjss94-020.

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Crop management influences the quantity and quality of organic matter in agricultural soils. A crop rotation study established at Lethbridge, Alberta in 1951 was sampled in September 1992 to determine the effect of crop management on total, light fraction and mineralizable (10-wk) organic matter contents. Spring wheat was the dominant cropping system; treatments examined include fallow frequency, forage hay production in rotation, manure amendment, N fertilizer application, and native grass. The two latter treatments were introduced in 1985. Total and light fraction organic matter did not vary

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7

PRADO, MARCELO RIBEIRO VILELA, FABRICIO TOMAZ RAMOS, OSCARLINA LÚCIA DOS SANTOS WEBER, and CAIO BATISTA MÜLLER. "ORGANIC CARBON AND TOTAL NITROGEN IN THE DENSIMETRIC FRACTIONS OF ORGANIC MATTER UNDER DIFFERENT SOIL MANAGEMENT." Revista Caatinga 29, no. 2 (2016): 263–73. http://dx.doi.org/10.1590/1983-21252016v29n201rc.

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ABSTRACT: The evaluation of land use and management by the measurement of soil organic matter and its fractions has gained attention since it helps in the understanding of the dynamics of their contribution to soil productivity, especially in tropical environments. This study was conducted in the municipality of Colorado do Oeste, state of Rondônia, Brazil and its aim was to determinethe quantity of organic carbon and total nitrogen in the light and heavy fractions of organic matter in the surface layers of a typic hapludalf under different land use systems: Native Forest: open evergreen fores

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8

Oladoye, Abiodun Olusegun, Noah Alabi Oyebamiji, and Smith-Sonubi Adedoyin. "Effects of Leafy Biomass of Some Agroforestry Tree Species on Light Fraction Organic Matter Content of Soil." Nigerian Journal of Technological Research 16, no. 2 (2021): 18–22. http://dx.doi.org/10.4314/njtr.v16i2.4.

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A study on light fraction organic matter was carried out on soil where leafy biomass of Enterolobium cyclocarpum (ENCY), Treculia africana (TRAF), Anogeissus leiocarpus (ANLE), Gliricidia sepium (GLSE), Leuceana leucocephala (LELE) were used as mulch. Soil samples were collected in each plot at two auger points 0-15 cm and 15-30 cm and then homogenized for laboratory analysis. ANLE was observed to have significant higher values (6.37, and 6.52) on soil pH, and at day 28 on soil pH respectively. Light fraction organic carbon (LFC) also experienced significant higher value (3.48 g/kg) at day 28

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Gregorich, E. G., B. C. Liang, C. F. Drury, and B. H. Ellert. "Fertilization Effects on Physically Protected Light Fraction Organic Matter." Soil Science Society of America Journal 61, no. 2 (1997): 482. http://dx.doi.org/10.2136/sssaj1997.03615995006100020016x.

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10

Staszel, Karolina, Jarosław Lasota, and Ewa Błońska. "Soil Organic Matter Fractions in Relation to Root Characteristics of Different Tree Species in Altitude Gradient of Temperate Forest in Carpathian Mountains." Forests 13, no. 10 (2022): 1656. http://dx.doi.org/10.3390/f13101656.

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The roots are a key functional component of belowground systems and one of the main factors influencing the quality and quantity of soil organic matter. Our research aimed to determine the fractional composition of the soil organic matter (SOM) in soils under various tree species on an altitude gradient. In our research, we related the SOM fractions with the root characteristics. There is a lack of information on the relationship between the SOM fractions and the root properties. We assessed labile and heavy fractions of SOM content in forest mountain soils with a climosequence approach. The s

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Papuga, Krzysztof, Jarosław Kaszubkiewicz, Dorota Kawałko, and Maria Kreimeyer. "Effect of Organic Matter Removal by Hydrogen Peroxide on the Determination of Soil Particle Size Distribution Using the Dynamometer Method." Agriculture 12, no. 2 (2022): 226. http://dx.doi.org/10.3390/agriculture12020226.

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The dynamometer method of determining particle size distribution was developed several years ago. The principles of sample preparation for this method are based on those used in other sedimentation methods. With improvements in these procedures, an investigation of the effect on obtained particle size distribution results by removing organic matter using hydrogen peroxide was proposed. For this purpose, the particle size distributions were determined in 50 soil samples with varying organic matter content, before and after organic matter removal. A comparative analysis of the results, including

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12

Carter, M. R., D. A. Angers, E. G. Gregorich, and M. A. Bolinder. "Characterizing organic matter retention for surface soils in eastern Canada using density and particle size fractions." Canadian Journal of Soil Science 83, no. 1 (2003): 11–23. http://dx.doi.org/10.4141/s01-087.

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Interest in the storage of organic matter in terrestrial ecosystems has identified a need to better understand the accumulation and retention of organic C and N in soil. The proportions of C and N associated with clay and silt particles (i.e., “capacity level”), water-stable macro-aggregates (WSA) (>250 µm), particulate (POM) (>53 µm), and light fraction (LF) organic matter, for the 0- to 10-cm soil depth, were assessed at 14 agricultural experimental sites established on Gleysolic, Podzolic, Luvisolic , and Brunisolic soils in the cool, humid region of eastern Canada. Organic C and N in

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13

Akinde, Bamikole Peter, Durodoluwa Joseph Oyedele, Fatai Oladapo Tijani, and Rotimi George Ibitoye. "Soil organic matter fractions under different agricultural land-use in Ile-Ife, Nigeria." Tropical Agriculture 97, no. 3 (2020): 149–63. https://doi.org/10.5281/zenodo.4706970.

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The study investigated the impact of long-term agricultural land-use on the distribution of density and particulate fractions of soil organic matter and examined the potential of soil aggregate size fractions to stabilize soil organic matter. Soil samples were collected at 0-15 and 15-30 cm soil depths from paddock, undisturbed secondary forest, continuously cropped land, teak, oil palm, and cacao plantations at the Teaching and Research Farm, Obafemi Awolowo University, Nigeria. The soil samples were air-dried, and segregated into three different aggregate-size classes (0.063-0.25, 0.25-1 and

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14

Moreira, Rodrigo Santos, Marcio Koiti Chiba, Isabella Clerici De Maria, Caio César Zito Siqueira, Aildson Pereira Duarte, and Debora Marcondes Bastos Pereira Milori. "Role of Crop Rotations in the Dynamic of Soil Organic Matter Pools." Journal of Agricultural Science 10, no. 8 (2018): 341. http://dx.doi.org/10.5539/jas.v10n8p341.

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Soil organic matter is considered a key attribute for a sustainable agricultural production and is influenced by the quantity and quality of the crop residue deposited on the soil surface. Therefore, different crop rotations could change the soil organic matter pools. The objectives of this study were to evaluate the soil carbon pools obtained by chemical and physical fractionation methods and the humification index under different crop rotations in a no-till system. We test the following hypothesis: a) the distribution of C and N among the soil organic matter fractions depends on plant specie

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15

Römkens, Paul F. A. M., Jan Hassink, and Johannes Van der Plicht. "Soil Organic 14C Dynamics: Effects of Pasture Installation on Arable Land." Radiocarbon 40, no. 2 (1997): 1023–31. http://dx.doi.org/10.1017/s0033822200018993.

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In a study addressing composition and recovery of soil carbon following pasture installation on arable land, radiocarbon isotope ratios were measured in size- and density-separated soil organic matter (SOM) fractions in a pasture and maize plot. The average soil carbon age increased with depth from 444 yr in the 0–30-cm layer to 2456 yr in the 60–80-cm layer in the pasture soils, and from 42 to 1625 yr in the maize-cultivated soil. Weight fractionation of the macro-organic matter (size >150 μm) in a light (density <1.17 g cm-3) intermediate (1.17 g cm-3 < density < 1.37 g cm-3), an

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16

N'dayegamiye, A., and D. A. Angers. "Organic matter characteristics and water-stable aggregation of a sandy loam soil after 9 years of wood-residue applications." Canadian Journal of Soil Science 73, no. 1 (1993): 115–22. http://dx.doi.org/10.4141/cjss93-011.

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The long-term effects of wood-residue applications on soil properties are not well documented. This study was undertaken to characterize the organic matter and aggregation of a sandy loam after 9 yr of biennial application of wood residues (tree clippings) at rates of 25, 50 and 100 Mg ha−1 with and without nitrogen fertilization. Carbon (C) and nitrogen (N) contents of the whole soil were determined as well as the C content of the density fractions and of the fractions soluble and insoluble to Na4P2O7. In comparison with the control, the whole-soil C content was 16–24% higher following applic

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17

Soon, Y. K. "Straw removal increases the light fraction and mineralizable C and N compared with moldboard ploughing." Canadian Journal of Soil Science 87, no. 1 (2007): 113–15. http://dx.doi.org/10.4141/s06-035.

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An earlier study indicated that cereal straw may be removed after harvest without affecting crop production, soil organic matter and microbial biomass. Further measurements of early indicators of changes in soil organic matter, viz., the light fraction and mineralizable C and N, confirm that straw removal is superior to straw incorporation with moldboard ploughing, and comparable to straw incorporation by disking, in C and N retention and turnover. Key words: Carbon, light fraction, mineralization, nitrogen, straw management

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18

Marques, Jean Dalmo de Oliveira, Flávio Jesus Luizão, Wenceslau Geraldes Teixeira, et al. "DISTRIBUTION OF ORGANIC CARBON IN DIFFERENT SOIL FRACTIONS IN ECOSYSTEMS OF CENTRAL AMAZONIA." Revista Brasileira de Ciência do Solo 39, no. 1 (2015): 232–42. http://dx.doi.org/10.1590/01000683rbcs20150142.

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Organic matter plays an important role in many soil properties, and for that reason it is necessary to identify management systems which maintain or increase its concentrations. The aim of the present study was to determine the quality and quantity of organic C in different compartments of the soil fraction in different Amazonian ecosystems. The soil organic matter (FSOM) was fractionated and soil C stocks were estimated in primary forest (PF), pasture (P), secondary succession (SS) and an agroforestry system (AFS). Samples were collected at the depths 0-5, 5-10, 10-20, 20-40, 40-60, 60-80, 80

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19

Maheswaran, J., and P. M. Attiwill. "Loss of organic matter, elements, and organic fractions in decomposing Eucalyptus microcarpa leaf litter." Canadian Journal of Botany 65, no. 12 (1987): 2601–6. http://dx.doi.org/10.1139/b87-350.

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The losses of organic matter, elements and organic fractions during the decomposition of Eucalyptus microcarpa Maiden leaf litter were measured in litterbags. The concentrations of nitrogen and phosphorus in litter increased for most of the decomposition period. At the end of 15 months the amounts of elements lost were in the order K > Na > Mg > P > N >Ca. A simple method to determine the different organic fractions according to the degree of decomposability and using a small quantity of litter (0.1 – 0.5 g) was developed. The mass loss during the initial 3 months was most close

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20

Brandani, Carolina B., Thalita F. Abbruzzini, Richard T. Conant, and Carlos Eduardo P. Cerri. "Soil organic and organomineral fractions as indicators of the effects of land management in conventional and organic sugar cane systems." Soil Research 55, no. 2 (2017): 145. http://dx.doi.org/10.1071/sr15322.

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Brazilian sugar cane production has undergone changes in residue management. To better understand the dynamics of soil C and N in soil organic matter (SOM) fractions resulting from sugar cane management practices, we determined: the effects of different sugar cane management on the C and N content of SOM fractions; the effects of crop management, soil texture, depth and different organic matter additions on changes in 13C/12C and 15N/14N isotope composition; and the amount of SOC derived from different sources. Physical fractionation of SOM was performed for soils cultivated under four sugar c

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21

Kopecký, Marek, Ladislav Kolář, Radka Váchalová, et al. "Black Carbon and Its Effect on Carbon Sequestration in Soil." Agronomy 11, no. 11 (2021): 2261. http://dx.doi.org/10.3390/agronomy11112261.

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The properties of black carbon (BC) are described very differently in the literature, even when determined by the same methodological procedure. To clarify this discrepancy, BC was investigated in the clay Cambisols of southern Bohemia, Czech Republic, in groups of soils with lower and higher deposition of its atmospheric fallout. The BC determination was performed according to a modified method of Kuhlbusch and Crutzen (1995). The amount of the free light fraction, the occluded light fraction of soil organic matter and its ratio, the amount of heavy soil fraction DF, and its soil organic matt

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22

Castanha, Cristina, Susan Trumbore, and Ronald Amundson. "Methods of Separating Soil Carbon Pools Affect the Chemistry and Turnover Time of Isolated Fractions." Radiocarbon 50, no. 1 (2008): 83–97. http://dx.doi.org/10.1017/s0033822200043381.

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A variety of physical and chemical techniques are used to fractionate soil organic matter, but detailed comparisons of the different approaches and tests of how separation methods influence the properties of isolated organic matter pools are lacking. In this case study based on A horizon samples of 2 California coniferous forests soils, we 1) evaluate the effects of root removal and ultrasonic dispersion on the properties of the <2 g cm-3 light fraction and 2) compare the properties of fractions obtained by sequential density separations of ultrasonically treated soil with those obtained by

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Entry, James A., and William H. Emmingham. "Influence of forest age on forms of carbon in Douglas-fir soils in the Oregon Coast Range." Canadian Journal of Forest Research 28, no. 3 (1998): 390–95. http://dx.doi.org/10.1139/x98-002.

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The amount and type of carbon (C) in a forest soil reflects the past balance between C accumulation and loss. In an old-growth forest soil, C is thought to be in dynamic equilibrium between accumulations and losses. Disturbance upsets this equilibrium by altering the microclimate, the amount and type of vegetation growing on a site, and properties that affect organic matter decomposition. We measured total C and forms of soil C in the L, F, and H layers and in the light fraction of soil organic matter in the 0-10 cm of mineral soil in old-, second-, and young-growth Douglas-fir (Pseudotsuga me

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Janzen, H. H., C. A. Campbell, S. A. Brandt, G. P. Lafond, and L. Townley-Smith. "Light-Fraction Organic Matter in Soils from Long-Term Crop Rotations." Soil Science Society of America Journal 56, no. 6 (1992): 1799–806. http://dx.doi.org/10.2136/sssaj1992.03615995005600060025x.

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Charles Paré, Maxime, and Angela Bedard-Haughn. "Optimum liquid density in separation of the physically uncomplexed organic matter in Arctic soils." Canadian Journal of Soil Science 91, no. 1 (2011): 65–68. http://dx.doi.org/10.4141/cjss10051.

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Paré, M. C. and Bedard-Haughn, A. 2011. Optimum liquid density in separation of the physically uncomplexed organic matter in Arctic soils. Can. J. Soil Sci. 91: 65–68. Using an appropriate density to separate the soil light fraction (LF) and heavy fraction (HF) is an important aspect of the density fractionation technique. The effect of liquid density when separating the physically uncomplexed Arctic soil organic matter (SOM) was tested on three Arctic sites: High-Arctic, Low-Arctic, and Sub-Arctic. Our results showed that selecting the right density to use for Arctic soils is not unequivocal.

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Conteh, A., and G. J. Blair. "The distribution and relative losses of soil organic carbon fractions in aggregate size fractions from cracking clay soils (Vertisols) under cotton production." Soil Research 36, no. 2 (1998): 257. http://dx.doi.org/10.1071/s97073.

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The distribution and losses of organic carbon fractions in various aggregate sizes from cracking clay soils were studied to understand some factors associated with losses of soil organic carbon under cultivation. Five pairs of samples from cropped and adjacent uncropped (reference) soils were collected from 5 of the main cotton-growing regions of Australia. Five aggregate sizes were separated from each of these soils (<50 µm, 50-150 µm, 150-250 µm, 250-450 µm, and 450-500 µm). On each of these aggregate fractions, measurements were made for total carbon (CT), labile carbon by ease of oxidat

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HUANG, Xiao-Juan, Qing-Ju HAO, and Yan WU. "Seasonal dynamics of soil light fraction organic matter in purple paddy soils." Chinese Journal of Eco-Agriculture 20, no. 12 (2013): 1579–85. http://dx.doi.org/10.3724/sp.j.1011.2012.01579.

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Barrios, E., R. J. Buresh, F. Kwesiga, and J. I. Sprent. "Light Fraction Soil Organic Matter and Available Nitrogen following Trees and Maize." Soil Science Society of America Journal 61, no. 3 (1997): 826–31. http://dx.doi.org/10.2136/sssaj1997.03615995006100030016x.

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29

Boone, Richard D. "Light-fraction soil organic matter: origin and contribution to net nitrogen mineralization." Soil Biology and Biochemistry 26, no. 11 (1994): 1459–68. http://dx.doi.org/10.1016/0038-0717(94)90085-x.

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They, Ng Haig, David Motta Marques, Rafael Siqueira Souza, and Lúcia Ribeiro Rodrigues. "Short-Term Photochemical and Biological Unreactivity of Macrophyte-Derived Dissolved Organic Matter in a Subtropical Shallow Lake." Journal of Ecosystems 2013 (July 30, 2013): 1–9. http://dx.doi.org/10.1155/2013/316709.

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Macrophytes have been associated with low bacterial metabolism in the littoral zones of lake Mangueira, but an explanation for this pattern is largely unknown. In this study, macrophyte-derived DOM was incubated in situ for the measurement of the effect of grazers, bacteria, and light on its degradation in three experiments. The water was separated in bulk, bacterial, and control (+ HgCl2) fractions and exposed to or hidden from sunlight for 120 h. Unchange in bacterial variables in the bulk fraction suggested a combined control of radiation and grazing on bacteria. Light treatment increased b

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Leal, Otávio dos Anjos, Rosa Maria Vargas Castilhos, Eloy Antonio Pauletto, et al. "Organic Matter Fractions and Quality of the Surface Layer of a Constructed and Vegetated Soil After Coal Mining. II - Physical Compartments and Carbon Management Index." Revista Brasileira de Ciência do Solo 39, no. 3 (2015): 895–902. http://dx.doi.org/10.1590/01000683rbcs20140784.

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Soils constructed after mining often have low carbon (C) stocks and low quality of organic matter (OM). Cover crops are decisive for the recovery process of these stocks, improving the quality of constructed soils. Therefore, the goal of this study was to evaluate the effect of cover crops on total organic C (TOC) stocks, C distribution in physical fractions of OM and the C management index (CMI) of a soil constructed after coal mining. The experiment was initiated in 2003 with six treatments: Hemarthria altissima (T1), Paspalum notatum (T2), Cynodon dactylon (T3), Urochloa brizantha (T4), bar

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Forestieri, Sara D., Gavin C. Cornwell, Taylor M. Helgestad, et al. "Linking variations in sea spray aerosol particle hygroscopicity to composition during two microcosm experiments." Atmospheric Chemistry and Physics 16, no. 14 (2016): 9003–18. http://dx.doi.org/10.5194/acp-16-9003-2016.

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Abstract. The extent to which water uptake influences the light scattering ability of marine sea spray aerosol (SSA) particles depends critically on SSA chemical composition. The organic fraction of SSA can increase during phytoplankton blooms, decreasing the salt content and therefore the hygroscopicity of the particles. In this study, subsaturated hygroscopic growth factors at 85 % relative humidity (GF(85 %)) of predominately submicron SSA particles were quantified during two induced phytoplankton blooms in marine aerosol reference tanks (MARTs). One MART was illuminated with fluorescent li

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Plante, A. F., C. E. Stewart, R. T. Conant, K. Paustian, and J. Six. "Soil management effects on organic carbon in isolated fractions of a Gray Luvisol." Canadian Journal of Soil Science 86, no. 1 (2006): 141–51. http://dx.doi.org/10.4141/s05-037.

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Agricultural management affects soil organic matter, which is important for sustainable crop production and as a greenhouse gas sink. Our objective was to determine how tillage, residue management and N fertilization affect organic C in unprotected, and physically, chemically and biochemically protected soil C pools. Samples from Breton, Alberta were fractionated and analysed for organic C content. As in previous reports, N fertilization had a positive effect, tillage had a minimal effect, and straw management had no effect on whole-soil organic C. Tillage and straw management did not alter or

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Angers, Denis A., Linnell M. Edwards, J. Brian Sanderson, and Nicole Bissonnette. "Soil organic matter quality and aggregate stability under eight potato cropping sequences in a fine sandy loam of Prince Edward Island." Canadian Journal of Soil Science 79, no. 3 (1999): 411–17. http://dx.doi.org/10.4141/s98-033.

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Soil degradation and soil organic matter (SOM) reduction have long been suspected to occur under intensive potato (Solanum tuberosum L.) production in Prince Edward Island. Thus, this study was conducted to evaluate the effect of eight potato cropping sequences involving barley (Hordeum vulgare L.), ryegrass (Lolium multiflorum L.), red clover (Trifolium pratense L.) and barley under-seeded with red clover on aggregate stability and SOM properties of a Charlottetown fine sandy loam (Orthic Humo-Ferric Podzol). Total C and N, light-fraction (density < 1.7 g cm−3) C (LF-C) and light-fraction

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Faria, Geraldo Erli, Nairam Félix de Barros, Roberto Ferreira Novais, and Ivo Ribeiro Silva. "Soil fertility, organic carbon and fractions of the organic matter at different distances from eucalyptus stumps." Revista Brasileira de Ciência do Solo 33, no. 3 (2009): 571–79. http://dx.doi.org/10.1590/s0100-06832009000300010.

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Knowledge on variations in vertical, horizontal and temporal characteristics of the soil chemical properties under eucalyptus stumps left in the soil is of fundamental importance for the management of subsequent crops. The objective of this work was to evaluate the effect of eucalyptus stumps (ES) left after cutting on the spatial variability of chemical characteristics in a dystrophic Yellow Argisol in the eastern coastal plain region of Brazil. For this purpose, ES left for 31 and 54 months were selected in two experimental areas with similar characteristics, to assess the decomposition effe

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Tu, Haoran, Jinlong Gao, Di Su, et al. "Differential Adsorption Behaviors of Light and Heavy SPM Fractions on Three Antibiotics: Implications for Lacustrine Antibiotic Migration." Water 17, no. 13 (2025): 1859. https://doi.org/10.3390/w17131859.

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Lakes are important sinks for antibiotics as suspended particulate matters (SPMs) in lakes have become significant carriers of antibiotic adsorption and migration. The light and heavy fractions of SPM are involved in the process of suspension and sedimentation in the aqueous environment. Combined with the adsorption behaviors of antibiotics onto SPM, a basis for the risk of antibiotic migration in lakes will be provided. In this study, SPM from Lake Taihu was collected and grouped according to density as light fraction (LF) and heavy fraction (HF), with heavy fraction including loosely bound h

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Quanrud, David M., Robert G. Arnold, Kevin E. Lansey, Carmen Begay, Wendell Ela, and A. Jay Gandolfi. "Fate of effluent organic matter during soil aquifer treatment: biodegradability, chlorine reactivity and genotoxicity." Journal of Water and Health 1, no. 1 (2003): 33–44. http://dx.doi.org/10.2166/wh.2003.0005.

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Hydrophobic acid (HPO-A) and transphilic acid (TPI-A) fractions of dissolved organic matter (DOM) were isolated from a domestic secondary wastewater effluent that was polished via soil aquifer treatment (SAT). Fractions were isolated using XAD resin adsorption chromatography from samples obtained along the vadose zone flowpath at a full-scale basin recharge facility in Tucson, Arizona. Changes in isolate character during SAT were established via biodegradability (batch test), specific ultraviolet light absorbance (SUVA), trihalomethane formation potential (THMFP), and Ames mutagenicity assays.

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Malhi, S. S., S. Brandt, and K. S. Gill. "Cultivation and grassland type effects on light fraction and total organic C and N in a Dark Brown Chernozemic soil." Canadian Journal of Soil Science 83, no. 2 (2003): 145–53. http://dx.doi.org/10.4141/s02-028.

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Light fraction of organic matter is a source of nutrients for plants and a substrate for microbes, while total organic matter is critical for optimum physical conditions and retention of nutrients and other chemicals in soil. The objective of this study was to evaluate the effects of cultivation and grassland type on light fraction and total C and N in a Dark Brown Chernozemic soil. Three paired-sets of soil samples, in five replications, were collected from three cultivated field areas under annual crops [mostly wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.)] and from three adja

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Wiatrowska, Katarzyna, and Jolanta Komisarek. "Role of the light fraction of soil organic matter in trace elements binding." PLOS ONE 14, no. 5 (2019): e0217077. http://dx.doi.org/10.1371/journal.pone.0217077.

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Wang, Shengrui, Wenli Yi, Suwen Yang, Xiangcan Jin, Guodong Wang, and Fengchang Wu. "Effects of light fraction organic matter removal on phosphate adsorption by lake sediments." Applied Geochemistry 26, no. 3 (2011): 286–92. http://dx.doi.org/10.1016/j.apgeochem.2010.12.001.

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Cardoso, José Alberto Ferreira, Augusto Miguel Nascimento Lima, Tony Jarbas Ferreira Cunha, et al. "ORGANIC MATTER FRACTIONS IN A QUARTZIPSAMMENT UNDER CULTIVATION OF IRRIGATED MANGO IN THE LOWER SÃO FRANCISCO VALLEY REGION, BRAZIL." Revista Brasileira de Ciência do Solo 39, no. 4 (2015): 1068–78. http://dx.doi.org/10.1590/01000683rbcs20140498.

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Improper land use has lead to deterioration and depletion of natural resources, as well as a significant decline in agricultural production, due to decreased soil quality. Removal of native vegetation to make way for agricultural crops, often managed inadequately, results in soil disruption, decreased nutrient availability, and decomposition of soil organic matter, making sustainable agricultural production unviable. Thus, the aim of the present study was to evaluate the impact of growing irrigated mango (over a 20 year period) on the organic carbon (OC) stocks and on the fractions of soil org

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Borisov, B. A., O. E. Efimov, O. V. Eliseeva, T. V. Tarazanova, and A. A. Prokhorov. "Organic matter of sod-podzolic soil after transition to a fallow state." IOP Conference Series: Earth and Environmental Science 937, no. 2 (2021): 022022. http://dx.doi.org/10.1088/1755-1315/937/2/022022.

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Abstract Soil plays a crucial role in carbon sequestration in terrestrial ecosystems. It is known that the strengthening of carbon sequestration processes occurs with a decrease in the intensity of soil treatments. The study of changes in organic matter and physical properties of sod-podzolic soil 16 years after the transition from arable soils to a fallow state against the background of weak water erosion was carried out. A significant increase in the content and reserves of total carbon in fallow soil compared to arable soil was found, mainly due to carbon of the light fraction. On arable so

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Yan, Shuangshuang, Haowen Jiang, Jinwang Li, et al. "Effect of Short-Term Organic Matter Returns on Soil Organic Carbon Fractions, Phosphorus Fractions and Microbial Community in Cold Region of China." Agronomy 13, no. 11 (2023): 2805. http://dx.doi.org/10.3390/agronomy13112805.

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To investigate the effect of different organic matter returns on soil organic carbon (SOC) fractions, phosphorus (P) fractions and microbial communities, a pot experiment was conducted in a cold region of China for three years. There were six treatments in this study, including no rice straw return (S0), rice straw return (SR), decomposed rice straw return (DS), rice-straw-burned return (BS), rice root return (RR) and decomposed cattle manure return (DM). The results indicated that the organic matter returns had no significant effect on the rice yield after three years. The SR, DS and DM treat

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Basler, A., M. Dippold, M. Helfrich, and J. Dyckmans. "Microbial carbon recycling: an underestimated process controlling soil carbon dynamics – Part 2: A C<sub>3</sub>-C<sub>4</sub> vegetation change field labelling experiment." Biogeosciences 12, no. 21 (2015): 6291–99. http://dx.doi.org/10.5194/bg-12-6291-2015.

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Abstract. The mean residence times (MRT) of different compound classes of soil organic matter (SOM) do not match their inherent recalcitrance to decomposition. One reason for this is the stabilization within the soil matrix, but recycling, i.e. the reuse of "old" organic material to form new biomass may also play a role as it uncouples the residence times of organic matter from the lifetime of discrete molecules in soil. We analysed soil sugar dynamics in a natural 30-year old labelling experiment after a wheat-maize vegetation change to determine the extent of recycling and stabilization by a

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Skjemstad, JO, RP Lefeuvre, and RE Prebble. "Turnover of soil organic matter under pasture as determined by 13C natural abundance." Soil Research 28, no. 2 (1990): 267. http://dx.doi.org/10.1071/sr9900267.

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The change in vegetation cover from rainforest with a C3 photosynthetic pathway to grasses with C4 pathways was used to follow input rates and turnover of organic matter in a krasnozem over an 83 year period. The measurement of 613c values on soils from three depths (0.0-7.5, 7.5-15.0, 60.0-80.0 cm) indicated that charcoal was a serious contaminant in the light fractions (<1.6 Mg mW3) of all samples and should be removed. Of the two grasses studied (Paspalum dilatatum and Pennisetum clandestinum), the latter gave more input of organic matter into the 7.5-15.0 cm horizon. In the other horizo

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Guareschi, Roni Fernandes, Marcos Gervasio Pereira, and Adriano Perin. "Densimetric fractionation of organic matter in an agricultural chronosequence in no-till areas in the Cerrado region, Brazil." Semina: Ciências Agrárias 37, no. 2 (2016): 595. http://dx.doi.org/10.5433/1679-0359.2016v37n2p595.

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Mineralization of organic residues deposited on the soil surface in a no-till system (NT) maintains a continuous flow of different forms of carbon (C), which might interfere with densimetric fractions of soil organic matter (SOM). Currently, there are few studies on variations in these fractions in NT areas with different deployment times in the Cerrado region. Thus, the objective of this study was to evaluate the total C, nitrogen (N), and 13C in the soil, as well as to quantify the mass and contents of C, N, and 13C in the light and heavy fractions of SOM extracted using different solutions

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Ren, Rongmin, Zhanqing Li, Peng Yan, et al. "Measurement report: The effect of aerosol chemical composition on light scattering due to the hygroscopic swelling effect." Atmospheric Chemistry and Physics 21, no. 13 (2021): 9977–94. http://dx.doi.org/10.5194/acp-21-9977-2021.

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Abstract. Liquid water in aerosol particles has a significant effect on their optical properties, especially on light scattering, whose dependence on chemical composition is investigated here using measurements made in southern Beijing in 2019. The effect is measured by the particle light scattering enhancement f(RH), where RH denotes the relative humidity, which is found to be positively and negatively impacted by the proportions of inorganic and organic matter, respectively. Black carbon is also negatively correlated. The positive impact is more robust when the inorganic matter mass fraction

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Zajusz-Zubek, Elwira, and Jan Konieczyński. "Coal Cleaning Versus the Reduction of Mercury and other Trace Elements’ Emissions from Coal Combustion Processes." Archives of Environmental Protection 40, no. 1 (2014): 115–27. http://dx.doi.org/10.2478/aep-2014-0012.

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Abstract Samples of steam coal used in heat and power plants as well as densimetric fractions obtained on a laboratory scale by dense organic liquid separation have been examined. The contents of ash, mercury, chromium, cadmium, copper, nickel and lead have been determined in coal, in the light and medium fraction as well as in the refuse. The degree of removal of mineral matter and the examined heavy metals as well as the coal combustible parts yield have been determined. Examination of 5 coals revealed that it is possible to remove 41% of mercury and more than 35% of other heavy metals bound

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Compton, Jana E., and Richard D. Boone. "Soil nitrogen transformations and the role of light fraction organic matter in forest soils." Soil Biology and Biochemistry 34, no. 7 (2002): 933–43. http://dx.doi.org/10.1016/s0038-0717(02)00025-1.

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Milczarek, M., E. Neczaj, and K. Parkitna. "Co-composting as an oxygen stabilization of an organic fraction of municipal solid waste and industrial sewage sludge." Water Science and Technology 68, no. 8 (2013): 1697–706. http://dx.doi.org/10.2166/wst.2013.402.

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The purpose of this work is to study the characteristics of the co-composting of municipal solid waste (MSW), sewage sludge, grass and sawdust. Differing proportions of biodegradable waste were investigated through changes of temperature, oxygen consumption, organic matters, moisture content, carbon, nitrogen, C/N ratio as well as heavy metals and pathogen microorganisms content. The present study has shown that addition of MSW above 10% had a negative impact on the composting process. The initial C/N of the mixtures with a higher MSW content was below 18. Lower losses of organic matter occurr

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