keyword
MENU ▼
Read by QxMD icon Read
search

soil compaction

keyword
https://www.readbyqxmd.com/read/28437777/testing-decontaminated-sediments-as-a-substrate-for-ornamentals-in-field-nursery-plantations
#1
Francesca Ugolini, Costanza Calzolari, Giuseppe Mario Lanini, Luciano Massetti, Stefania Pollaki, Antonio Raschi, Francesco Sabatini, Giacomo Tagliaferri, Fabrizio Ungaro, Daniele Massa, Maurizio Antonetti, Carlos Garcia Izquierdo, Cristina Macci, Grazia Masciandaro
When canals and harbours are dredged, huge amount of polluted sediments has to be stocked and transported to the landfill with incredibly high costs of management. Among the remediation techniques for the reclamation of polluted sediments and soils, phytoremediation represents a sustainable and effective technique though still not fully promoted or commercialized. In this study we have tested the suitability for plant nursing of a substrate resulting from sediments dredged from a canal and treated with phytoremediation...
April 21, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28424726/size-mediated-interaction-between-a-cushion-species-and-other-non-cushion-species-at-high-elevations-of-the-hengduan-mountains-sw-china
#2
Yang Yang, Jian-Guo Chen, Christian Schöb, Hang Sun
Arenaria polytrichoides (Caryophyllaceae) is a common cushion plant occurring at high elevations in the Himalaya-Hengduan Mountains, SW China. It frequently has other non-cushion species growing within its canopy, forming a contrast with the surrounding areas because it creates patches of higher diversity and greater biomass. In this study, we examined the relationship between the cushions and associated non-cushion species along a gradient of cushion size. A total of 200 A. polytrichoides individuals were selected to fit four size classes...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28400783/genetic-diversity-under-soil-compaction-in-wheat-root-number-as-a-promising-trait-for-early-plant-vigor
#3
Tino Colombi, Achim Walter
Soil compaction of arable land, caused by heavy machinery constitutes a major threat to agricultural soils in industrialized countries. The degradation of soil structure due to compaction leads to decreased (macro-) porosity resulting in increased mechanical impedance, which adversely affects root growth and crop productivity. New crop cultivars, with root systems that are adapted to conditions of increased soil strength, are needed to overcome the limiting effects of soil compaction on plant growth. This study aimed (i) to quantify the genetic diversity of early root system development in wheat and to relate this to shoot development under different soil bulk densities and (ii) to test whether root numbers are suitable traits to assess the genotypic tolerance to soil compaction...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28393122/effect-of-class-f-fly-ash-on-fine-sand-compaction-through-soil-stabilization
#4
Siavash Mahvash, Susana López-Querol, Ali Bahadori-Jahromi
This paper presents the results of an experimental investigation carried out to evaluate the effect of fly ash (FA) on fine sand compaction and its suitability as a material for embankments. The literature review demonstrates the lack of research on stabilization of sandy material using FA. The study is concerned with the role of FA content in stabilized soil physical characteristics. The main aim of this paper is to determine the optimum quantity of FA content for stabilization of this type of soil. This is achieved through particle size distribution and compaction (standard proctor) tests...
March 2017: Heliyon
https://www.readbyqxmd.com/read/28391460/estimation-of-heavy-metal-contaminated-soils-mechanical-characteristics-using-electrical-resistivity
#5
Ya Chu, Songyu Liu, Fei Wang, Guojun Cai, Hanliang Bian
Under the process of urbanization in China, more and more attention has been paid to the reuse of heavy metal-contaminated sites. The shear characteristics of heavy metal-contaminated soils are investigated by electrical detection in this paper. Three metal ions (Zn(2+), Cd(2+), and Pb(2+)) were used, the metal concentrations of which are 50, 166.67, 500, 1666.67, and 5000 mg/kg, respectively. Direct shear tests were used to investigate the influence of heavy metal ions on the shear characters of soil samples...
April 8, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28348395/the-role-of-local-instabilities-in-fluid-invasion-into-permeable-media
#6
Kamaljit Singh, Hagen Scholl, Martin Brinkmann, Marco Di Michiel, Mario Scheel, Stephan Herminghaus, Ralf Seemann
Wettability is an important factor which controls the displacement of immiscible fluids in permeable media, with far reaching implications for storage of CO2 in deep saline aquifers, fuel cells, oil recovery, and for the remediation of oil contaminated soils. Considering the paradigmatic case of random piles of spherical beads, fluid front morphologies emerging during slow immiscible displacement are investigated in real time by X-ray micro-tomography and quantitatively compared with model predictions. Controlled by the wettability of the bead matrix two distinct displacement patterns are found...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28334122/a-laboratory-evaluation-of-chemigation-to-manage-stink-bugs-hemiptera-pentatomidae
#7
Xing Wei, Phillip M Roberts, Wesley M Porter, Calvin D Perry, Michael D Toews
Application of insecticides for stink bug management through overhead irrigation, also called chemigation, could reduce application costs, soil compaction, and applicator exposure, while enabling growers to treat multiple fields simultaneously. The objective of these laboratory experiments was to compare knockdown, survival, and efficacy of insecticides when appropriately diluted for ground sprayer and chemigation applications. Treatments included water, bifenthrin [0.11 kg (AI)/ha] and dicrotophos [0.56 kg (AI)/ha] diluted for a ground sprayer (93...
April 1, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28203533/modification-of-extraction-method-for-community-dna-isolation-from-salt-affected-compact-wasteland-soil-samples
#8
Purvi Zaveri, Rushika Patel, Meghavi Patel, Devki Sarodia, Nasreen S Munshi
To overcome the issue of interferences by salt and compactness in release of bacterial cell required for lysis, method described by Yeates et al. (1998), was optimized for isolation of genomic material (Deoxyribo Nucleic Acid, DNA) from soil microbial community by addition of Al(NH4)SO4. Very low total viable count was observed in the samples tested and hence use of higher amount of soil is required primarily for DNA isolation from wasteland soils. The method proves itself efficient where commercially available bead beating and enzymatic lysis methods could not give isolation of any amount of community genomic DNA due to compact nature and salt concentrations present in soil...
2017: MethodsX
https://www.readbyqxmd.com/read/28188986/effects-of-biochar-and-wood-pellets-amendments-added-to-landfill-cover-soil-on-microbial-methane-oxidation-a-laboratory-column-study
#9
Erin N Yargicoglu, Krishna R Reddy
Alternate landfill covers designed to enhance microbial methane (CH4) oxidation and reduce the negative impacts of landfill gas emissions on global climate have recently been proposed and investigated. In this study, the use of biochar as a soil amendment is examined in order to assess the feasibility and effectiveness for enhanced CH4 removal in landfill covers when incorporated under high compaction conditions and relatively low soil moisture. Four different cover configurations were tested in large soil columns for ∼510 days and potential CH4 oxidation rates were determined following long-term incubation in small batch assays...
May 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28149182/characterization-of-spatial-variability-of-soil-physicochemical-properties-and-its-impact-on-rhodes-grass-productivity
#10
E Tola, K A Al-Gaadi, R Madugundu, A M Zeyada, A G Kayad, C M Biradar
Characterization of soil properties is a key step in understanding the source of spatial variability in the productivity across agricultural fields. A study on a 16 ha field located in the eastern region of Saudi Arabia was undertaken to investigate the spatial variability of selected soil properties, such as soil compaction 'SC', electrical conductivity 'EC', pH (acidity or alkalinity of soil) and soil texture and its impact on the productivity of Rhodes grass (Chloris gayana L.). The productivity of Rhodes grass was investigated using the Cumulative Normalized Difference Vegetation Index (CNDVI), which was determined from Landsat-8 (OLI) images...
February 2017: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/28144874/tailoring-a-non-path-dependent-model-for-environmental-risk-management-and-polycentric-urban-land-use-planning
#11
Yousef Sakieh, Abdolrassoul Salmanmahiny, Seyed Hamed Mirkarimi
This study attempts to develop a non-path-dependent model for environmental risk management and polycentric urban land-use planning in Gorgan Township area, Iran. Applying three suitability layers of environmental risk (soil erosion, flood risk, fire risk, and land susceptibility), urbanization potential, and integrated surface (environmental risk plus urbanization potential layers), a non-path-dependent Cellular Automata-Markov Chain (CA-MC) model was configured to execute three scenarios of polycentric urban growth allocation...
February 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28108925/soil-compaction-effects-on-soil-health-and-cropproductivity-an-overview
#12
Adnan Noor Shah, Mohsin Tanveer, Babar Shahzad, Guozheng Yang, Shah Fahad, Saif Ali, Muhammad Adnan Bukhari, Shahbaz Atta Tung, Abdul Hafeez, Biangkham Souliyanonh
Soil compaction causes substantial reduction in agriculture productivity and has always been of great distress for farmers. Intensive agriculture seems to be more crucial in causing compaction. High mechanical load, less crop diversification, intensive grazing, and irrigation methods lead to soil compaction. It is further exasperated when these factors are accompanied with low organic matter, animal trampling, engine vibrations, and tillage at high moisture contents. Soil compaction increases soil bulk density and soil strength, while decreases porosity, aggregate stability index, soil hydraulic conductivity, and nutrient availability, thus reduces soil health...
January 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28104330/evaluation-of-individual-and-combined-management-practices-to-reduce-the-off-site-transport-of-pesticides-from-golf-course-turf
#13
Pamela J Rice, Brian P Horgan, Jennifer L Hamlin
The detection of pesticides, associated with turfgrass management, in storm runoff and surface waters of urban watersheds has raised concerns regarding their source, potential environmental effects and a need for strategies to reduce their inputs. In previous research we discovered that hollow tine core cultivation (HTCC) was more effective than other management practices for reducing the off-site transport of pesticides with runoff from creeping bentgrass turf managed as a golf course fairway. This was primarily the result of enhanced infiltration and reduced runoff volumes associated with turf managed with hollow tines...
January 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28099774/drivers-of-soil-and-tree-carbon-dynamics-in-urban-residential-lawns-a-modeling-approach
#14
T L E Trammell, R V Pouyat, M M Carreiro, I Yesilonis
Soils constitute the largest sink of terrestrial carbon (C), and urban soils have the potential to provide significant soil C storage. Soils in urbanized landscapes experience a multitude of human alterations, such as compaction and management subsidies, that impact soil C dynamics. While field studies may provide data on urban soil C storage, modeling soil C dynamics under various human impact scenarios will provide a basis for identifying drivers of urban soil C dynamics and for predicting the potential for these highly altered soils to store C over time intervals not typically amenable to empirical validation...
April 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28088548/soil-carbon-dioxide-emissions-from-a-rubber-plantation-on-tropical-peat
#15
Nur Wakhid, Takashi Hirano, Yosuke Okimoto, Siti Nurzakiah, Dedi Nursyamsi
Land-use change in tropical peatland potentially results in a large amount of carbon dioxide (CO2) emissions owing to drainage, which lowers groundwater level (GWL) and consequently enhances oxidative peat decomposition. However, field information on carbon balance is lacking for rubber plantations, which are expanding into Indonesia's peatlands. To assess soil CO2 emissions from an eight-year-old rubber plantation established on peat after compaction, soil CO2 efflux was measured monthly using a closed chamber system from December 2014 to December 2015, in which a strong El Niño event occurred, and consequently GWL lowered deeply...
January 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/27987049/inter-and-intraannual-growth-patterns-of-urban-small-leaved-lime-tilia-cordata-mill-at-two-public-squares-with-contrasting-microclimatic-conditions
#16
Astrid Moser, Mohammad A Rahman, Hans Pretzsch, Stephan Pauleit, Thomas Rötzer
The effects of urban conditions on tree growth have been investigated in an increasing number of studies over the last decades, emphasizing the harsh environment of cities. Urban trees often grow in highly paved, compacted sites with consequently less soil moisture, higher soil temperatures, and greater vapor pressure deficits. However, there is still a knowledge gap regarding the impact of harsh paved environments on urban tree growth during drought years on the growth patterns of urban trees. The present study investigated the structure and growth of the common urban tree species small-leaved lime (Tilia cordata) at a highly paved public square (CPS) compared with a contrasting more open, greener square (OGS)...
December 16, 2016: International Journal of Biometeorology
https://www.readbyqxmd.com/read/27959897/impact-of-amendments-on-the-physical-properties-of-soil-under-tropical-long-term-no-till-conditions
#17
Antonio C A Carmeis Filho, Carlos A C Crusciol, Tiara M Guimarães, Juliano C Calonego, Sacha J Mooney
Tropical regions have been considered the world's primary agricultural frontier; however, some physico-chemical deficiencies, such as low soil organic matter content, poor soil structure, high erodibility, soil acidity, and aluminum toxicity, have affected their productive capacity. Lime and gypsum are commonly used to improve soil chemical fertility, but no information exists about the long-term effects of these products on the physical attributes and C protection mechanisms of highly weathered Oxisols. A field trial was conducted in a sandy clay loam (kaolinitic, thermic Typic Haplorthox) under a no-tillage system for 12 years...
2016: PloS One
https://www.readbyqxmd.com/read/27956014/oil-permeability-variations-on-lagoon-sand-beaches-in-the-patos-gua%C3%A3-ba-system-in-rio-grande-do-sul-brazil
#18
Elaine Baroni Oliveira, João Luiz Nicolodi
Permeability is the ability of a sediment deposit to allow fluids to pass through it. It depends on the local types of sediments. When the fluid is oil, high permeability implies greater interaction with the site and more extensive damage, which makes recovery most difficult. Knowledge of permeability oscillations is necessary to understand oil behavior and improve cleanup techniques. The goal is to determine oil permeability variations on lagoon sand beaches. Oil permeability tests were performed at the beach face, using a Modified Phillip Dunne Permeameter and parameters were sampled...
December 9, 2016: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/27934905/contributions-of-rational-soil-tillage-to-compaction-stress-in-main-peanut-producing-areas-of-china
#19
Pu Shen, Zhengfeng Wu, Chunxiao Wang, Sheng Luo, Yongmei Zheng, Tianyi Yu, Xuewu Sun, Xiushan Sun, Caibin Wang, Xinhua He
Tillage intensities largely affect soil compaction dynamics in agro-ecosystems. However, the contribution of tillage intensities on compaction changes in underground peanut (Arachis hypogaea) fields has not been quantified. We thus aimed to better understand the role of soil tillage intensities in mitigation of compaction stress for peanuts. Using three field tillage experiments in major Chinese peanut producing areas, we quantified the effects of (1) no tillage, (2) shallow (20 cm) plowing, (3) deep (30 cm) plowing and (4) deep (30 cm) loosening on changes in soil bulk density at 0-10 cm, 10-20 cm and 20-30 cm depths, roots and pods growth, and nutrient accumulation...
December 9, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27864371/applicability-of-recycled-aggregates-in-concrete-piles-for-soft-soil-improvement
#20
Ronaldo A Medeiros-Junior, Carlos Et Balestra, Maryangela G Lima
The expressive generation of construction and demolition waste is stimulating several studies for reusing this material. The improvement of soft soils by concrete compaction piles has been widely applied for 40 years in some Brazilian cities. This technique is used to improve the bearing capacity of soft soils, allowing executing shallow foundations instead of deep foundations. The compaction piles use a high volume of material. This article explored the possibility of using recycled aggregates from construction waste to replace the natural aggregates in order to improve the bearing capacity of the soft soil, regarding its compressive strength...
November 17, 2016: Waste Management & Research
keyword
keyword
61463
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"