Biochemical Fractionation of Soil Organic Matter after Incorporation of Organic Residues

Parent, Léon‐Étienne; Parent, Léon E.

doi:10.4236/ojss.2015.56013

Cited by 6 publications

(3 citation statements)

References 36 publications

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“…ASVs, representing 9.5% and 20% of total sequence abundance in water and sediment samples, respectively). An adjacency matrix was computed using the function adjacency on the centred logratio transformed ASV sequence counts (clr function, package compositions; (Parent and Parent, 2015)) to ensure sub-compositional coherence. The function infers ASVs connectivity by calculating an ASV similarity matrix (based on Pearson correlation) and applying soft thresh-holding to empathize the strongest correlations.…”

Section: P 2)mentioning

confidence: 99%

Urbanization promotes specific bacteria in freshwater microbiomes including potential pathogens

Numberger

Zoccarato

Woodhouse

et al. 2022

Science of The Total Environment

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Section: P 2)mentioning

confidence: 99%

Urbanization promotes specific bacteria in freshwater microbiomes including potential pathogens

Numberger

Zoccarato

Woodhouse

et al. 2022

Science of The Total Environment

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“…High soil total porosity might be due to high soil OM content, whereas low total porosity corresponds to the high bulk density values of the soil of farm fields. According to Brady et al [19], Parent [55], suggestions, normal porosity ranges from 47-51% and 51-55% for clay loam and clay texture soils, respectively. The mean value of soil total porosity recorded for soils of farm fields of the study area could provide good aeration for crop production and microorganisms in the study area.…”

Section: Bulk Density and Total Porositymentioning

confidence: 99%

Assessment and Mapping of Soil Fertility Status of Migna Kura Kebele, Wayu Tuka District, East Wollega, Oromia, Ethiopia

Desalegn

2024

ASRJ

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Soil fertility decline is a significant obstacle to Ethiopia's increased food production, but information on current soil fertility status among the study areas is inadequate. Accurate soil fertility data is crucial for implementing effective strategies and developing targeted interventions to improve agricultural productivity and food security in Ethiopia. This study was initiated in this context with the aim of mapping the spatial distribution of specific soil parameters and assessing the status of soil fertility in Migna Kura Kebele, Wayu Tuka District, East Wollega, Ethiopia, providing crucial information for agrarian development. A total of 32 samples of surface soil were drawn at Stratifying random for laboratory analysis in 2019 G.C. Maps of soil fertility status were created using ArcGIS 10.4.1 and the common Kriging interpolation technique. Clay loam and clay are the two types of soil in the research study area. The bulk density of the soil ranged from 1.13 to 1.46 g/cm3, while the total porosity ranged from 42.57 to 55.15%. The pH of the soil can range from 6.7, which is slightly acidic, to 4.91, which is strongly acidic. The range of soil exchangeable acidity levels was 0 to 2.46 cmol (+) kg-1, while the range of OC values was medium (1.79% to 3.51%). Soil total N and available P values were between very low and low (0.19 to 1.11%) and 6.71 to 13.44 mg kg-1, respectively. Exchangeable Ca, Mg, K, and Na levels in the soil ranged from 6.93 to 51.15, 2.85 to 23.63, 0.21 to 1.76, and 0.05 to 0.71 cmol (+) kg-1, respectively, while a medium to very high degree of CEC (22.19 to 77.42 cmol (+) kg-1) was observed. A moderate to very high rating was assigned to soil PBS, which ranged from 42.13 to 98.30%. Micro nutrients; Fe, Mn, Cu, and Zn extractable from soil by DTPA ranged in value from 12.07 to 33.51 mg kg-1, 16.02 to 48.26 mg kg-1, 0.18 to 0.62 mg kg-1, and 0.19 to 0.62 mg kg-1, respectively. The soil fertility map was created for the following parameters: pH, OC, total N, available (P, S), CEC, PBS, Ca, Mg, Fe, and Mn; Cu, Zn, and B. According to the study's findings, the study area's soils were found to be deficient in six nutrients that limit yields: N, P, K, S, B, and Zn. he soil in the study area is affected by soil acidity; for sustainable crop production in the study area, soils should be amended with lime, organic matter, and fertilizers of N, P, S, K, B, and Zn.

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“…Soil and organic matter are fractal objects [10] [11] that interact with each other [12]. Organic matter is a mixture of objects of various sizes and biochemical compositions [6] [13]. In batch reactions, surface area of particles and substrate reactivity per unit surface are enhanced by shredding and grinding, and by agitating the mixture [7].…”

Section: Introductionmentioning

confidence: 99%

Fractal Kinetics Parameters Regulating Carbon Decomposition Rate under Contrasting Soil Management Systems

Parent¹

2017

OJSS

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Agricultural soils can sequester and release large amounts of carbon. Accessibility of soil carbon to microbial attacks depends on biological, chemical, and physical protection mechanisms such as organic matter composition and particle size, soil aggregation, and chemical protection through the silt-clayorganic matter complex. While soil and organic matter are fractal objects controlling exposure of reactive surfaces to the environment, soil aggregation and biomass production and quality are regulated by agricultural practices. Organic matter decomposition in soil is generally described by the classical first-order kinetics equations fitted to define distinct carbon pools. By comparison, fractal kinetics assigns a coefficient to adjust time-dependent decomposition rate of total soil carbon to protection mechanisms. Our objective was to relate fractal parameters of organic matter decomposition to soil management systems. Retrieving published data, the decomposition of organic matter was modeled in a silt loam soil maintained under pasture, annual cropping or bare fallow during 11 years. The classical first-order kinetics model returned quadratic relationships indicating that reactive carbon decreased with time. Fractal kinetics rectified the relationships successfully.Initial decomposition rate (k 1 at t = 1) was 7 × 10 −4 for pasture, 1 × 10 −4 for annual cropping, and 0.5 × 10 −4 for bare-soil fallow. Fractal coefficients h were 0.71, 0.45, and 0.25 for pasture, annual cropping and fallow, respectively. Due to aggregation, physical protection against microbial attacks was highest under pasture management, leading to higher carbon sequestration despite higher biomass production and "priming" effects. Parameters k 1 and h proved to be useful indicators for soil quality classification integrating the opposite effects of labile carbon decomposition and carbon protection mechanisms that regulate the decomposition rate of organic matter with time as driven by soil management practices.

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Biochemical Fractionation of Soil Organic Matter after Incorporation of Organic Residues

Cited by 6 publications

References 36 publications

Urbanization promotes specific bacteria in freshwater microbiomes including potential pathogens

Urbanization promotes specific bacteria in freshwater microbiomes including potential pathogens

Assessment and Mapping of Soil Fertility Status of Migna Kura Kebele, Wayu Tuka District, East Wollega, Oromia, Ethiopia

Fractal Kinetics Parameters Regulating Carbon Decomposition Rate under Contrasting Soil Management Systems

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