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aggregatestability, etc ; air drying; labor; prediction; research; soil aggregates; soil water; tillage; Show all 8 Subjects
Abstract:
... Aggregate stability (AS) is an important parameter to evaluate soil resistance to erosion. The conventional determination methods to measure AS are time consuming, difficult and labour intensive. Visible (vis) and near infrared (NIR) spectroscopy could be a better alternative to the conventional determination methods of AS. This study explored the possibilities of estimating three AS indices, refl ...
aggregatestability, etc ; microaggregates; principal component analysis; soil organic matter; soil profiles; topsoil; China; Show all 7 Subjects
Abstract:
... Different aggregates vary in their ability to retain or adsorb metals in soil. Five soil profiles were sampled from different soil horizons and grouped, and the concentrations of Al, Mg, Ca, Fe, Mn, Cd, Cu and Pb were determined in six sizes of aggregates (> 2, 2-1, 1-0.6, 0.6-0.25, 0.25-0.053, < 0.053 mm). Significantly high (p < 0.05) structural stability indexes (SSI) and aggregate stability in ...
aggregatestability, etc ; drought; edaphic factors; farms; forests; nitrification; nutrient availability; soil aggregates; soil respiration; China; Show all 10 Subjects
Abstract:
... Wetting dry soil is well known for generating respiration and nutrient pulses (the “Birch effect”), but the effects of frequent drying-rewetting (DRW) cycles, especially the effects regarding nutrient availability, have not been well investigated. This study was designed to determine how DRW frequency influences soil respiration, aggregate stability and nutrient availability. Soil was collected fr ...
aggregatestability, etc ; alkalinity; bauxite; ecological restoration; organic carbon; pollution; remediation; soil formation; thermal stability; toxicology; Show all 10 Subjects
Abstract:
... Soil-formation process is critical to ecological rehabilitation on bauxite residue disposal areas. In this study, a soil column experiment was taken to assess the dynamic variations of soil-formation indicators in bauxite residue driven by the integration of waste solids and microorganisms. Results showed that the combination of waste solids and microorganisms significantly decreased the alkalinit ...
aggregatestability, etc ; cations; rain; rainfall simulation; research; salt concentration; soil aggregates; splash erosion; water conservation; Show all 9 Subjects
Abstract:
... Soil interparticle forces can pose important effects on soil aggregate stability and rainfall splash erosion. Meanwhile, these interparticle forces are strongly influenced by specific ion effects. In this study, we applied three monovalent cations (Li⁺, Na⁺, and K⁺) with various concentrations to investigate the influence of specific ion effects on aggregate stability and splash erosion via pipett ...
aggregatestability, etc ; dissolved organic carbon; heavy metals; hydrophobicity; lead; microplastics; phenanthrenes; polyacrylonitrile; polyethylene; polyethylene terephthalates; sorption; Show all 11 Subjects
Abstract:
... Microplastics (MPs) accumulation in soil ecosystems has become a worldwide issue. The influence of MPs on soil structures and contaminant transport has not been clearly unraveled. This study conducted soil column experiments covering four different treatments: soil without MPs (CK), soil with 0.5 wt% polyethylene (S+PE), soil with 0.5 wt% polyacrylonitrile (S+PAN), and soil with 0.5 wt% polyethyle ...
... Preservation of biochemically recalcitrant organic matter and protection within soil aggregates are two important mechanisms of soil organic carbon (SOC) preservation, but their relative importance remains unclear. In this study, we converted part of a mature secondary forest to two young plantation forests (Castanopsis carlesii and Chinese fir) and an assisted naturally regenerated (ANR) forest i ...
aggregatestability, etc ; Mollisols; agriculture; animal manures; corn; crop residues; crop rotation; mineral fertilizers; soil organic carbon; soybeans; Show all 10 Subjects
Abstract:
... Fertilization practices change soil organic carbon content and distribution, which is relevant to crop rotation and soil aggregates. However, how fertilization management under corn–soybean rotation affects soil organic carbon and aggregate stability at different soil depths in Mollisols is unclear. The effects of 6–yr fertilization under corn–soybean rotation on aggregate stability, soil organic ...
... Microplastics (MPs) have become a problematic pollutant in different environments. Dry soil aggregates may have a remarkable influence on the emissions of MPs from surface soil due to wind erosion. Here, we sampled surface soils and monitored wind erosion events to investigate the number of MPs distributed in different dry soil aggregate sizes and the implications for MP emissions induced by wind ...
... Small changes in soil aggregates-associated organic carbon (OC) can induce huge fluctuations in greenhouse gas emissions. However, there is a knowledge gap on the responses to nitrogen (N) fertilization under plastic film mulching, especially in long-term continuous rotation systems. This study assessed the impacts of plastic film mulching and N fertilization on the soil aggregate distribution and ...
... Changes in soil aggregation with biochar amendment have been investigated extensively, but how biochar affects the chemical composition of organic carbon (C) and biological binding agents in aggregates and their linkage with soil aggregate stability remains unclear. Soil samples were collected in a rice paddy treated with 0 (C0, control), 10 t ha⁻¹ (C10), 20 t ha⁻¹ (C20) and 40 t ha⁻¹ (C40) biocha ...
Amelie Baomalgré Bougma; Korodjouma Ouattara; Halidou Compaore; Hassan Bismarck Nacro; Caleb Melenya; Samuel Ayodele Mesele; Vincent Logah; Jamiu Oladipupo Azeez; Elmar Veenendaal; Jonathan Lloyd
aggregatestability, etc ; atmospheric precipitation; climate; forests; humans; land use; microaggregates; savannas; soil organic carbon; soil quality; Western Africa; Show all 11 Subjects
Abstract:
... PURPOSE: In the mesic savannas of West Africa, areas around villages of relatively tall and dense forest vegetation are often found. These ‘forest islands’ are presumably the direct outcome of human activity. To better understand these patches with relatively luxuriant vegetation, our study focused on how they influence soil aggregate stability- a key indicator of soil resilience to degradation th ...
aggregatestability, etc ; conventional tillage; corn; irrigation; land degradation; no-tillage; saturated hydraulic conductivity; seals; soil aggregates; soil organic carbon; Show all 10 Subjects
Abstract:
... The effect of no‐tillage (NT) (zero tillage) versus conventional tillage (CT) has been evaluated in rainfed conditions but has seldom been studied under irrigation, where soil sealing favours soil degradation. To contribute to this knowledge, this research analyses soil aggregate stability under disaggregation forces produced under irrigation (causing slaking and mechanical breakdown) and the susc ...
aggregatestability, etc ; afforestation; atmospheric precipitation; catenas; cropland; ecological restoration; nitrogen; phytomass; soil aggregates; soil organic carbon; total nitrogen; China; Show all 12 Subjects
Abstract:
... Vegetation restoration is an important factor affecting soil carbon (C) and nitrogen (N) sequestration. However, the effects of the type of vegetation restoration on soil C and N sequestration varies owing to different environmental conditions. Therefore, additional studies should explore the effects of vegetation restoration type on soil C and N sequestration, especially between natural restorati ...
aggregatestability, etc ; arable soils; biodiversity; grasslands; livestock; raindrop impact; sediments; soil compaction; soil erosion; vegetation cover; water quality; England; Show all 12 Subjects
Abstract:
... PURPOSE: Modern agricultural practices have increased the losses of fine sediment and associated pollutants to watercourses with associated off-site degradation of water quality and aquatic biodiversity. Despite significant investment into agri-environment initiatives which aim to reduce these losses, limited empirical mechanistic evidence exists for the efficacy of many on-farm interventions. As ...
aggregatestability, etc ; autoclaving; carbon nitrogen ratio; case studies; colorimetry; marshes; nitrogen content; organic nitrogen; soil carbon; soil organic matter; Show all 10 Subjects
Abstract:
... The fraction of soil protein extracted by autoclaving soil (AESP) has emerged as a potential indicator of available organic nitrogen (N), aggregate stability, and soil carbon (C) storage potential. Estimates of AESP are often based on colorimetric assays—primarily the Bradford assay—yet the results of these assays can be confounded by interference from polyphenolic contaminants of soil protein ext ...
... The progression of water erosion patterns from rill to gully erosion significantly affects the level of soil aggregate degradation, and thereby stimulates variations in the biochemical mechanisms controlling the OC mineralization ratio. These conditions can affect the exchange of carbon from biosphere to atmosphere. We examined the effect of erosion progression on the physical and biochemical soil ...
Luiz Alberto da Silva Rodrigues Pinto; Sandra Santana de Lima; Cristiane Figueira da Silva; Rafael Gomes da Mota Gonçalves; Igor de Sousa Morais; Robert Ferreira; Wanderson Farias da Silva Junior; José Luiz Rodrigues Torres; Marcos Gervasio Pereira
... Conventional and conservation tillage systems can alter soil aggregation and total and labile soil organic matter (SOM) contents. This study aimed to determine the degree of soil aggregation, quantify total carbon (TC), permanganate oxidizable carbon (POXC), light organic matter (LOM), and potentially mineralizable carbon (CO₂-C) contents in soils aggregates, and assess soil quality indexes at sit ...
... Plant virus elimination is commonly used to rejuvenate the plant, and improve yield and quality, but how it affects belowground growth and the soil environment remains unknown. Here, the root morphological and metabolic traits, soil physicochemical properties, and bacterial diversity and composition of the rhizosphere and surrounding bulk soil of virus-free (VF) and common virus- carrying (VC) Chr ...
... Orchards in insular, mountainous environments provide a range of Ecosystem Services (ES). However, research on the benefits of mixed orchards to ES remains very limited. We use Cyprus as a model to study the ES provided by 52 mixed orchards in Organic (Org) and Conventional (Con) farms. The orchards comprised different tree species including pome and stone fruits, nuts and other crops. A framework ...