keyword
MENU ▼
Read by QxMD icon Read
search

soil management

keyword
https://www.readbyqxmd.com/read/28087696/genetic-and-biochemical-characterization-of-a-gene-operon-for-trans-aconitic-acid-a-novel-nematicide-from-bacillus-thuringiensis
#1
Cuiying Du, Shiyun Cao, Xiangyu Shi, Xiangtao Nie, Jinshui Zheng, Yun Deng, Lifang Ruan, Donghai Peng, Ming Sun
Trans-aconitic acid (TAA) is an isomer of cis-aconitic acid (CAA), an intermediate of the tricarboxylic acid (TCA) cycle that is synthesized by aconitase. Although TAA production has been detected in bacteria and plants for many years and is known to be a potent inhibitor of aconitase, its biosynthetic origins and the physiological relevance of its activity have remained unclear. We have serendipitously uncovered key information relevant to both of these questions. Specifically, in a search for novel nematicidal factors from Bacillus thuringiensis, a significant nematode pathogen harboring many protein virulence factors, we discovered a high-yielding component that showed activity against the plant-parasitic nematode Meloidogyne incognita and surprisingly identified it as TAA...
January 13, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28081161/factors-related-with-ch4-and-n2o-emissions-from-a-paddy-field-clues-for-management-implications
#2
Chun Wang, Derrick Y F Lai, Jordi Sardans, Weiqi Wang, Congsheng Zeng, Josep Peñuelas
Paddy fields are major sources of global atmospheric greenhouse gases, including methane (CH4) and nitrous oxide (N2O). The different phases previous to emission (production, transport, diffusion, dissolution in pore water and ebullition) despite well-established have rarely been measured in field conditions. We examined them and their relationships with temperature, soil traits and plant biomass in a paddy field in Fujian, southeastern China. CH4 emission was positively correlated with CH4 production, plant-mediated transport, ebullition, diffusion, and concentration of dissolved CH4 in porewater and negatively correlated with sulfate concentration, suggesting the potential use of sulfate fertilizers to mitigate CH4 release...
2017: PloS One
https://www.readbyqxmd.com/read/28080215/laparoscopy-assisted-duhamel-z-anastomosis-for-total-colonic-aganglionosis-outcome-assessed-by-fecal-continence-evaluation
#3
Go Miyano, Hiroki Nakamura, Shogo Seo, Ryo Sueyoshi, Manabu Okawada, Takashi Doi, Hiroyuki Koga, Geoffrey J Lane, Tadaharu Okazaki, Atsuyuki Yamataka
BACKGROUND: A Z-shaped colorectal side-to-side anastomosis was introduced to improve the Duhamel procedure by eliminating the rectal blind pouch. We retrospectively reviewed all total colonic aganglionosis patients treated by laparoscopy-assisted Duhamel-Z (LapDZ) between 2009 and 2014 focusing on annual fecal continence evaluation scores (CES) as an indicator of outcome. METHODS: LapDZ was performed conventionally. Postoperatively, defecation was regulated with medications and enemas according to our standard protocol...
January 12, 2017: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/28079647/using-public-health-data-for-soil-pb-hazard-management-in-ohio
#4
John F Obrycki, Tyler Serafini, Darryl B Hood, Chris Alexander, Pam Blais, Nicholas T Basta
OBJECTIVES: To evaluate how frequently elevated soil lead (Pb) hazards (≥400 ppm Pb) were identified in existing blood Pb site investigations in Ohio. DESIGN: This study evaluated 3050 site investigations from the Ohio Department of Health for children with blood Pb levels at or above 10 μg dL that contained bare soil Pb data. SETTING: Data were collected from existing databases maintained by the Ohio Department of Health. PARTICIPANTS: All data were de-identified prior to analysis...
January 11, 2017: Journal of Public Health Management and Practice: JPHMP
https://www.readbyqxmd.com/read/28078983/cutaneous-larva-migrans
#5
Alexander K C Leung, Benjamin Barankin, Kam Lun Hon
BACKGROUND: Cutaneous larva migrans is one of the most common skin diseases reported in travelers returning from tropical regions. Western physicians, however, are often not familiar of this condition. OBJECTIVE: To review in depth the epidemiology, pathophysiology, clinical manifestations, complications, and treatment of cutaneous larva migrans. METHODS: A PubMed search was completed in Clinical Queries using the key term "cutaneous larva migrans"...
January 10, 2017: Recent Patents on Inflammation & Allergy Drug Discovery
https://www.readbyqxmd.com/read/28076772/impact-of-dairy-manure-pre-application-treatment-on-manure-composition-soil-dynamics-of-antibiotic-resistance-genes-and-abundance-of-antibiotic-resistance-genes-on-vegetables-at-harvest
#6
Yuan-Ching Tien, Bing Li, Tong Zhang, Andrew Scott, Roger Murray, Lyne Sabourin, Romain Marti, Edward Topp
Manuring ground used for crop production is an important agricultural practice. Should antibiotic-resistant enteric bacteria carried in the manure be transferred to crops that are consumed raw, their consumption by humans or animals will represent a route of exposure to antibiotic resistance genes. Treatment of manures prior to land application is a potential management option to reduce the abundance of antibiotic resistance genes entrained with manure application. In this study, dairy manure that was untreated, anaerobically digested, mechanically dewatered or composted was applied to field plots that were then cropped to lettuce, carrots and radishes...
January 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28074366/improved-slant-drilling-well-for-in-situ-remediation-of-groundwater-and-soil-at-contaminated-sites
#7
Yasuhide Furukawa, Kazuhiro Mukai, Keisuke Ohmura, Takeshi Kobayashi
Soil contamination has become a crucial issue in urban redevelopment. Japan has many contaminated sites on which manufacturing has been conducted over several decades. Site holders are now under pressure to manage chemical contamination; however, the use of heavy machinery is difficult in remedial operations on restricted sites, especially where there are still working factories. The slant well is a potentially useful technique in such settings, but its use is technically challenging because of the need for high drilling accuracy and the difficulty in sealing the slanted bores...
January 10, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28073496/the-re-eutrophication-of-lake-erie-harmful-algal-blooms-and-hypoxia
#8
REVIEW
Susan B Watson, Carol Miller, George Arhonditsis, Gregory L Boyer, Wayne Carmichael, Murray N Charlton, Remegio Confesor, David C Depew, Tomas O Höök, Stuart A Ludsin, Gerald Matisoff, Shawn P McElmurry, Michael W Murray, R Peter Richards, Yerubandi R Rao, Morgan M Steffen, Steven W Wilhelm
Lake Erie supplies drinking water to more than 11 million consumers, processes millions of gallons of wastewater, provides important species habitat and supports a substantial industrial sector, with >$50 billion annual income to tourism, recreational boating, shipping, fisheries, and other industries. These and other key ecosystem services are currently threatened by an excess supply of nutrients, manifested in particular by increases in the magnitude and extent of harmful planktonic and benthic algal blooms (HABs) and hypoxia...
June 2016: Harmful Algae
https://www.readbyqxmd.com/read/28070285/the-contribution-of-nitrogen-deposition-to-the-eutrophication-signal-in-understorey-plant-communities-of-european-forests
#9
Han F van Dobben, Wim de Vries
We evaluated effects of atmospheric deposition of nitrogen on the composition of forest understorey vegetation both in space and time, using repeated data from the European wide monitoring program ICP-Forests, which focuses on normally managed forest. Our aim was to assess whether both spatial and temporal effects of deposition can be detected by a multiple regression approach using data from managed forests over a relatively short time interval, in which changes in the tree layer are limited. To characterize the vegetation, we used indicators derived from cover percentages per species using multivariate statistics and indicators derived from the presence/absence, that is, species numbers and Ellenberg's indicator values...
January 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28070271/heterogeneous-microcommunities-and-ecosystem-multifunctionality-in-seminatural-grasslands-under-three-management-modes
#10
Jingpeng Li, Zhirong Zheng, Hongtao Xie, Nianxi Zhao, Yubao Gao
Increasing attention has been paid to the relationship between biodiversity and ecosystem functioning (BEF) because of the rapid increase in species loss. However, over the past 20 years, most BEF studies only focused on the effect of species diversity on one or a few ecosystem functions, and only a few studies focused on ecosystem multifunctionality (i.e., the simultaneous provision of several ecosystem functions). Grassland ecosystems have important economic, environmental, and esthetic value; thus, this study focused on the heterogeneous microcommunities in grasslands under three management modes...
January 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28069301/future-water-availability-in-the-largest-freshwater-mediterranean-lake-is-at-great-risk-as-evidenced-from-simulations-with-the-swat-model
#11
Tuba Bucak, Dennis Trolle, Hans Estrup Andersen, Hans Thodsen, Şeyda Erdoğan, Eti E Levi, Nur Filiz, Erik Jeppesen, Meryem Beklioğlu
Inter- and intra-annual water level fluctuations and changes in water flow regime are intrinsic characteristics of Mediterranean lakes. Additionally, considering climate change projections for the water-limited Mediterranean region, increased air temperatures and decreased precipitation are anticipated, leading to dramatic declines in lake water levels as well as severe water scarcity problems. The study site, Lake Beyşehir, the largest freshwater lake in the Mediterranean basin, is - like other Mediterranean lakes - threatened by climatic changes and over-abstraction of water for irrigated crop farming...
January 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28067861/phylis-a-low-cost-portable-visible-range-spectrometer-for-soil-and-plants
#12
Matt J Aitkenhead, Graham J Gaskin, Noemie Lafouge, Cathy Hawes
Monitoring soil and crop condition is vital for the sustainable management of agricultural systems. Often, land management decision-making requires rapid assessment of conditions, which is difficult if samples need to be taken and sent elsewhere for analysis. In recent years, advances in field-based spectroscopy have led to improvements in real-time monitoring; however, the cost of equipment and user training still makes it inaccessible for most land managers. At the James Hutton Institute, we have developed a low-cost visible wavelength hyperspectral device intended to provide rapid field-based assessment of soil and plant conditions...
January 7, 2017: Sensors
https://www.readbyqxmd.com/read/28065545/geochemical-isotopic-composition-in-the-loess-plateau-and-corresponding-source-analyses-a-case-study-of-china-s-yangjuangou-catchment
#13
Yafeng Wang, Liding Chen, Yang Gao, Shibo Chen, Weiliang Chen, Zhuo Hao, Junjie Jia, Ning Han
Isotopic fractionation technology is widely used in identifying sources and the speciation of geochemical isotopic elements. With the increase in human activity, geochemical element transport by soil erosion has become the most critical environmental problem in the Loess Plateau, so tracing the geochemical element source would help in the identification and management of local soil erosion. In this study, we investigated the spatial distribution of carbon (C), nitrogen (N), oxygen (O), and hydrogen (H) isotopes in water and then further analyzed (13)C and (15)N in soil and vegetation to better understand the C and N sources and their biogeochemical cycling function in the Loess Plateau...
January 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28065542/arsenic-bio-accessibility-and-bioaccumulation-in-aged-pesticide-contaminated-soils-a-multiline-investigation-to-understand-environmental-risk
#14
M S Rahman, A J Reichelt-Brushet, M W Clark, T Farzana, L H Yee
Bio-accessibility and bioavailability of arsenic (As) in historically As-contaminated soils (cattle tick pesticide), and pristine soils were assessed using 3 different approaches. These approaches included human bio-accessibility using an extraction test replicating gastric conditions (in vitro physiologically-based extraction test); an operationally defined bioaccessibility extraction test - 1.0M HCl extraction; and a live organism bioaccumulation test using earthworms. A sequential extraction procedure revealed the soil As-pool that controls bio-accessibility and bioaccumulation of As...
January 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28063656/effect-of-cyclic-redox-oscillations-on-water-quality-in-freshwater-acid-sulfate-soil-wetlands
#15
Niloofar Karimian, Scott G Johnston, Edward D Burton
Restoration of acid sulfate soil (ASS) wetlands by freshwater re-flooding can lead to the reformation of various Fe(II) and reduced inorganic sulfur (RIS) species in surface soil layers. However, in many locations, wetland water levels undergo large seasonal fluctuations that drive extreme redox oscillations. Newly formed RIS species [e.g. greigite, mackinawite, nano-pyrite and S(0)] and Fe(II) are vulnerable to rapid oxidation during dry periods and may generate substantial acidity. Rainfall following a dry period may then mobilise acidity and metal cations in surface waters prior to eventual recovery in pH by re-establishment of reducing conditions...
January 4, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28062103/effects-of-soil-salinity-on-the-content-composition-and-ion-binding-capacity-of-glomalin-related-soil-protein-grsp
#16
Zhonghua Zhang, Qiong Wang, Hua Wang, Siming Nie, Zhengwei Liang
Soil aggregation, an ecosystem function correlated with the concentration of glomalin-related soil protein (GRSP), is highly disturbed in saline soil. However, few studies have focused on differences in amount, composition, and ion binding capacity of GRSP in typical sodic-saline soils. In this study, a field study was performed in Songnen Plain. Combined indicators of soil salinity (Q value) were significant negatively correlated with GRSP concentration by Principal Component Analysis. Multiple linear regression models showed that soil salinity might account for 46%, 25% and 44% variation in total GRSP (T-GRSP), easily-extractable GRSP (EE-GRSP) and difficultly-extractable GRSP (DE-GRSP), respectively...
January 4, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28060497/solid-phase-speciation-and-solubility-of-phosphorus-in-an-acid-sulfate-paddy-soil-during-soil-reduction-and-reoxidation-as-affected-by-oil-palm-ash-and-biochar
#17
Worachart Wisawapipat, Kamolchanok Charoensri, Jirawat Runglerttrakoolchai
Understanding phosphorus (P) speciation and how redox conditions control P solubility in acid sulfate paddy soils with limited P availability is crucial for improving soil P availability. We examined P speciation and extractability in an acid sulfate paddy soil incorporated with oil palm ash (OPA) and biochar (OPB) during soil reduction and subsequent oxidation. Phosphorus K-edge X-ray absorption near edge structure (XANES) spectra of the soil samples revealed that P in the soil mainly occurred as P adsorbed to ferrihydrite and P adsorbed to gibbsite...
January 6, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28057341/the-impact-of-agricultural-management-on-selected-soil-properties-in-citrus-orchards-in-eastern-spain-a-comparison-between-conventional-and-organic-citrus-orchards-with-drip-and-flood-irrigation
#18
M A Hondebrink, L H Cammeraat, A Cerdà
The agricultural management of citrus orchards is changing from flood irrigated managed orchards to drip irrigated organic managed orchards. Eastern Spain is the oldest and largest European producer of citrus, and is representative of the environmental changes triggered by innovations in orchard management. In order to determine the impact of land management on different soil quality parameters, twelve citrus orchards sites were selected with different land and irrigation management techniques. Soil samples were taken at two depths, 0-2cm and 5-10cm for studying soil quality parameters under the different treatments...
January 3, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28056450/current-status-and-associated-human-health-risk-of-vanadium-in-soil-in-china
#19
Jie Yang, Yanguo Teng, Jin Wu, Haiyang Chen, Guoqiang Wang, Liuting Song, Weifeng Yue, Rui Zuo, Yuanzheng Zhai
A detailed assessment of vanadium contamination characteristics in China was conducted based on the first national soil pollution survey. The map overlay analysis was used to evaluate the contamination level of vanadium and the non-carcinogenic risk assessment model was calculated to quantify the vanadium exposure risks to human health. The results showed that, due to the drastically increased mining and smelting activities, 26.49% of soils were contaminated by vanadium scattered in southwest of China. According to Canadian soil quality guidelines, about 8...
December 13, 2016: Chemosphere
https://www.readbyqxmd.com/read/28053585/comparative-efficacy-of-different-approaches-to-managing-meloidogyne-incognita-on-green-bean
#20
Ahmad S Al-Hazmi, Ahmed A M Dawabah, Saleh N Al-Nadhari, Fahad A Al-Yahya
A greenhouse study was conducted to compare the relative efficacy of different approaches to managing Meloidogyne incognita on green bean. These approaches included chemical (fumigant, non-fumigant, seed dressing, and seed dip), biological (the egg-parasitic fungus, Paecilomyces lilacinus and the mycorrhizal fungus Glomus sp.), physical (soil solarization), and cultural (chicken litter and urea) methods. Accordingly, nine different control materials and application methods plus nematode-infected and non-infected controls were compared...
January 2017: Saudi Journal of Biological Sciences
keyword
keyword
104649
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"