An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
soilpH, etc ; agricultural soils; carcinogenicity; food chain; food security; human health; lead; pollutants; risk; soil quality; wastes; wheat; Show all 12 Subjects
Abstract:
... Heavy metals (HMs) from smelters pose severe challenges to the environmental soil quality of surrounding farmlands, and threaten human health through the food chain. This study explored the environmental effects of smelting activities on farmland soil, and additionally assessed the enrichment, transfer and health risk of HMs in soil-wheat systems. Multiple characterization results were combined to ...
soilpH, etc ; adsorption; clay fraction; energy content; glucose; meta-analysis; microbial carbon; nitrogen; soil ecology; soil organic carbon; Show all 10 Subjects
Abstract:
... Soil organic matter (SOM) decomposition and stabilisation are largely affected by microbial carbon use efficiency (CUE), which is defined as the proportion of substrate carbon (C) uptake that microbes use for growth. Microbial CUE varies due to substrate quality and availability differences, but this may also depend on soil properties, such as pH, soil organic C (SOC) and clay content. We conducte ...
... Soil carbon (C) storage affects many ecosystem properties and, consequently, is an important measure of reclamation success in sites where soil develops de novo. In this study, we have used the chronosequence of unreclaimed heaped post-mining sites (16–56 years old) after open cast coal mining near Sokolov (Czechia) in order to study C stock on the floor and the topsoil layers (0–5 and 5–10 cm) of ...
soilpH, etc ; cattle; ecosystems; environment; equations; fire suppression; land use; lignin; organic matter; plant litter; prescribed burning; water content; wetland plants; wetlands; Florida; Show all 15 Subjects
Abstract:
... Litter decomposition is a fundamental process underpinning multiple ecosystem services. Despite a long history of research on decomposition, direct and indirect effects of multiple interactive land management on wetland decomposition yet remain less well understood. Here, we used a long-term whole-ecosystem wetland experiment in south-central Florida to investigate interactive effects of land-use ...
soilpH, etc ; agricultural soils; corn; data collection; food safety; human health; irrigation; models; pollution; prediction; risk; risk assessment; sewage; toxicity; wheat; China; Yellow River; Show all 17 Subjects
Abstract:
... Cadmium (Cd) pollution of agricultural soil is of public concern due to its high potential toxicity and mobility. This study aimed to reveal the risk of Cd accumulation in soil and wheat/maize systems, with a specific focus on the source-specific ecological risk, human health risk and Cd enrichment model. For this we investigated more than 6100 paired soil and grain samples with 216 datasets inclu ...
soilpH, etc ; bioavailability; environment; freeze-thaw cycles; health effects assessments; heavy metals; human health; humans; intestines; particle size; permafrost; risk assessment; surface area; uncertainty; China; Show all 15 Subjects
Abstract:
... As global warming intensifies, there will be increased uncertainty as to the environmental behavior and risks from heavy metals in industrial/legacy contaminated sites in permafrost regions. Bioavailability has been increasingly used for human health risk assessment of heavy metals in contaminated soils. Soil heavy metal bioavailability depends on soil physicochemical properties, and freeze-thaw a ...
... Despite recent advances in the ecology of lichens from a community perspective, much remains unknown at the species level particularly in arid regions. In this context, the current study investigated the differential effects of five lichen species dominating South Mediterranean arid ecosystem (Diploschistes diacapsis (Ach.) Lumbsch, Squamarina cartilaginea (With.) P. James, Fulgensia bracteata (Ho ...
soilpH, etc ; Bothriochloa ischaemum; Stipa bungeana; climate; cropland; ecological restoration; enzymes; field capacity; microbial carbon; phosphorus; rhizosphere; secondary succession; soil enzymes; soil nutrients; structural equation modeling; total nitrogen; total phosphorus; water stress; China; Show all 19 Subjects
Abstract:
... Plant–plant interactions are dynamic and complicated processes that strongly influence soil nutrient cycling in ecosystems. Climate warming-induced drought stress and the duration of plant interactions may reshape or complicate this ecological process. However, little is known about how plant–plant interaction time (co-growth duration) combined with drought stress affect soil chemical properties a ...
soilpH, etc ; Landsat; models; prediction; regression analysis; China; Show all 6 Subjects
Abstract:
... Mapping the distribution and quantity of soil properties is important for black soil protection, management, and restoration in northeastern China. The objective of this study was to evaluate the effect of the spatial resolution on soil pH mapping using satellite images of the black soil region in northeastern China. A high spatial resolution Gaofen (GF)-2 high-definition image and multispectral i ...
soilpH, etc ; acetylene; ammonia; genes; nitrification; nitrogen content; Show all 6 Subjects
Abstract:
... Although autotrophic ammonia oxidizing archaea (AOA) and bacteria (AOB) and comammox coexist in soils, their abundances and contributions to nitrification are not well addressed, especially in arable black soils. In this study, using the nitrification inhibitors acetylene and octyne, the contributions to nitrification potential provided by different ammonia oxidizers and heterotrophic nitrifiers i ...
soilpH, etc ; bioavailability; bioremediation; calcium; calcium carbonate; soil solution; Show all 6 Subjects
Abstract:
... Bioremediation based on microbial induced carbonate precipitation (MICP) was conducted in Cd-contaminated seleniferous soils with objective to investigate effects of MICP on the fates of Cd and Se in soils. Results showed that soil indigenous microorganisms could induce MICP process to stabilize Cd and mobilize Se without inputting exogenous urease-producing strain. After remediation, soluble Cd ( ...
soilpH, etc ; Archaea; ammonia; community structure; genes; phylogeny; China; Show all 7 Subjects
Abstract:
... Archaeal ammonia oxidizers (AOA) are important in converting ammonia into nitrates in soils. While many aspects of their community structure have been studied, the relative importance of stochastic versus deterministic processes has been poorly understood. We compared AOA communities across the North China Plain, targeting the amoA gene. A phylogenetic null modelling approach was used to calculate ...
soilpH, etc ; brown rice; limestone; paddies; remediation; risk; sepiolite; China; Show all 8 Subjects
Abstract:
... The scientific application of stabilized materials has been considered an effective method for the in situ remediation of Cd-contaminated soil. This study aimed to investigate the persistence of the effect of a combined amendment of limestone and sepiolite (LS) on soil Cd availability and accumulation in rice grown in a mildly Cd-contaminated paddy field (0.45 mg/kg of Cd) over three consecutive r ...
soilpH, etc ; Camellia; absorbance; agronomy; karsts; nutrient uptake; soil fertility; Show all 7 Subjects
Abstract:
... Golden Camellia species are highly specific to certain soil environments. Most species are only native to calcareous soils in karst regions, except for a few that grow only in acidic soils. Our aim is to elucidate the adaptation mechanisms of the species of calcareous-soil golden Camellia (CSC) and acidic-soil golden Camellia (ASC) to habitat soils through plant–soil nutrient characteristics and t ...
soilpH, etc ; calcium carbonate; cation exchange capacity; phosphates; phosphorus; sorption; Show all 6 Subjects
Abstract:
... The effect of reaction between soil and phosphate on pH has not previously been explored or explained. We incubated samples of a soil with calcium carbonate to give a range of pHCaCl2 from 4.2 to 7.2, and then measured the change in pH when these samples were reacted with phosphate solutions. These solutions were at the same pH as the soil to which they were added. We also measured exchangeable ca ...
soilpH, etc ; Melastomataceae; calyx; color; geographical distribution; sand; temperature; Brazil; Show all 8 Subjects
Abstract:
... Microlicia cataphracta (DC.) (Versiane & R.Romero) is one of the most widely distributed and polymorphic taxa of Lavoisiereae (Melastomataceae). This species has been described as an ochlospecies with 20 described taxonomic entities. This circumscription includes a wide continuum of morphological variation exhibited by the species throughout its geographic range. This study attempts to verify whic ...
soilpH, etc ; Rhizobium; Trifolium repens; Trifolium subterraneum; bioassays; mannitol; yeasts; Show all 7 Subjects
Abstract:
... The purpose of developing this high throughput assay was to determine whether there was evidence of pH adaptation in strains of rhizobia which nodulate subterranean clover (SC) and white clover (WC), and whether this was related to the pH of the soil of origin. pH is a first-order factor influencing the niche preferences of soil microorganisms and has been convincingly shown to be a key driver of ...
soilpH, etc ; cadmium; environmental quality; land management; rice; risk; China; Show all 7 Subjects
Abstract:
... Because of unusually high cadmium concentrations in the soil, the risk screening values of soil Cd in the existing standard is not applicable to the Cd high geological background areas. The aim of our study is to explore recommended risk screening values applicable for Cd high geological background areas of Guangxi, China, to help locals with land management and guarantee the quality and safety of ...
soilpH, etc ; Anaeromyxobacter; RNA; glucose; organic carbon; paddies; paddy soils; Show all 7 Subjects
Abstract:
... Anaeromyxobacter spp. are prevalent and can make important contribution to microbial Fe(III) reduction in flooded paddy soils, which could be greatly regulated by exogenous organic C input. In this study, dynamics in the abundance and structure of metabolically active Anaeromyxobacter community based on RNA level were investigated by a 40‐d anaerobic incubation of paddy soils amended with glucose ...
soilpH, etc ; Fusarium wilt; Musa; bananas; greenhouse experimentation; nitrogen; phytomass; Show all 7 Subjects
Abstract:
... AIMS: This study looks whether the response of soil management (liming and nitrogen fertilization) on the incidence of Fusarium wilt (Foc Race 1) in Gros Michel banana (Musa AAA) varies with different soil properties. METHODS: The effect of inoculation with Foc Race 1 was studied in a factorial greenhouse trial with soil samples from eight representative soil types from the Costa Rican banana regi ...