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https://www.readbyqxmd.com/read/28806553/thiacloprid-adsorption-and-leaching-in-soil-effect-of-the-composition-of-irrigation-solutions
#1
José Antonio Rodríguez-Liébana, M Dolores Mingorance, Aránzazu Peña
Pressure on groundwater resources has increased during the last decades due to the growing demand, especially in arid and semiarid regions, such as the Mediterranean basin, with frequent drought periods. In order to partially remediate this environmental problem of world concern, irrigation of agricultural lands with adequately treated wastewaters (TWW) is becoming a common management practice. The complex composition of these low-quality waters may influence the behavior of organic contaminants in soils. A calcareous soil with low organic carbon content was selected for the assessment of the adsorption and leaching of the neonicotinoid insecticide thiacloprid (THC)...
August 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28806549/liming-impacts-on-soils-crops-and-biodiversity-in-the-uk-a-review
#2
REVIEW
J E Holland, A E Bennett, A C Newton, P J White, B M McKenzie, T S George, R J Pakeman, J S Bailey, D A Fornara, R C Hayes
Fertile soil is fundamental to our ability to achieve food security, but problems with soil degradation (such as acidification) are exacerbated by poor management. Consequently, there is a need to better understand management approaches that deliver multiple ecosystem services from agricultural land. There is global interest in sustainable soil management including the re-evaluation of existing management practices. Liming is a long established practice to ameliorate acidic soils and many liming-induced changes are well understood...
August 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28806545/improvement-of-the-drought-indicators-system-in-the-j%C3%A3%C2%BAcar-river-basin-spain
#3
Tatiana Ortega-Gómez, Miguel A Pérez-Martín, Teodoro Estrela
Droughts are one of the gravest natural threats currently existing in the world and their occurrence and intensity might be exacerbated in the coming years due to climate change. The severe impacts that droughts cause to inland water resources and to the associated socio-economic activities justify the continuous monitoring of the drought. The case study presented shows a practical application of a distributed drought monitoring system implemented in a real river basin district, the Júcar River Basin District (43,000km(2)), where drought periods of marked intensity have occurred historically and the climate ranges from humid in the north to semiarid in the south...
August 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28805737/effects-of-short-term-set-aside-management-practices-on-soil-microorganism-and-enzyme-activity-in-china
#4
Guangyu Li, Cifang Wu
Set-aside farmland can effectively improve the self-rehabilitation of arable soil. Long-term set-asides however cannot satisfy provisionment, therefore the use of short-term set-asides to restore cultivated soil is a better option. Few studies have compared short-term set-aside patterns, and the effects of set-asides on soil microbial community and enzyme enzymes. We analyzed the bacterial structure, microbial biomass carbon/nitrogen and enzyme activity of farmland soil under different set-aside regimes in the Yellow River Delta of China...
August 14, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28805707/integrating-soil-silicon-amendment-into-management-programs-for-insect-pests-of-drill-seeded-rice
#5
James M Villegas, Michael O Way, Rebecca A Pearson, Michael J Stout
Silicon soil amendment has been shown to enhance plant defenses against insect pests. Rice is a silicon-accumulating graminaceous plant. In the southern United States, the rice water weevil and stem borers are important pests of rice. Current management tactics for these pests rely heavily on the use of insecticides. This study evaluated the effects of silicon amendment when combined with current management tactics for these rice insect pests in the field. Field experiments were conducted from 2013 to 2015...
August 13, 2017: Plants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28804490/a-vision-for-incorporating-environmental-effects-into-nitrogen-management-decision-support-tools-for-u-s-maize-production
#6
Kamaljit Banger, Mingwei Yuan, Junming Wang, Emerson D Nafziger, Cameron M Pittelkow
Meeting crop nitrogen (N) demand while minimizing N losses to the environment has proven difficult despite significant field research and modeling efforts. To improve N management, several real-time N management tools have been developed with a primary focus on enhancing crop production. However, no coordinated effort exists to simultaneously address sustainability concerns related to N losses at field- and regional-scales. In this perspective, we highlight the opportunity for incorporating environmental effects into N management decision support tools for United States maize production systems by integrating publicly available crop models with grower-entered management information and gridded soil and climate data in a geospatial framework specifically designed to quantify environmental and crop production tradeoffs...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28803424/nitrate-pollution-in-the-warta-river-poland-between-1958-and-2016-trends-and-causes
#7
Józef Górski, Krzysztof Dragon, Piotr Michał Jan Kaczmarek
The article presents analyses of long-term water quality data from the Warta River between 1958 and 2016. A clear increasing trend in nitrate concentrations was observed from 1958 to the early 1990s. This trend was mainly related to the increasing use of fertilizers in Poland in this period. Then, after the early 1990s, a slow decreasing trend related to improvements in water and sewage management and more rational fertilizer use was observed after political and economic changes in Poland. The influence of long-term hydrological droughts on nitrate concentrations was also investigated...
August 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28802128/sorption-potential-of-alkaline-treated-straw-and-a-soil-for-sulfonylurea-herbicide-removal-from-aqueous-solutions-an-environmental-management-strategy
#8
Irina-Gabriela Cara, Bogdan-George Rusu, Lucian Raus, Gerard Jitareanu
The adsorption potential of alkaline treated straw (wheat and corn) in mixture with soil, has been investigated for the removal of sulfonylurea molecules from an aqueous solutions. The surface characteristics were investigated by scanning electron microscopy and Fourier Transform Infrared - FTIR, while the adsorbent capacity was evaluated using batch sorption tests and liquid chromatography coupled with mass spectrometry. Surface analysis of alkaline treated straw samples by scanning electron microscopy - SEM showed the increasing of the surface roughness improving their functional surface activity...
July 31, 2017: Chemosphere
https://www.readbyqxmd.com/read/28801851/vertical-distribution-of-soil-extractable-organic-c-and-n-contents-and-total-c-and-n-stocks-in-78-year-old-tree-plantations-in-subtropical-australia
#9
Xiaoqi Zhou, Haibo Dong, Zhongming Lan, Gary Bacon, Yanbin Hao, Chengrong Chen
Few studies have focused on the effects of long-term forest plantations on the soil profile of carbon (C) and nitrogen (N) stocks. In this study, we selected 78-year-old tree plantations that included three coniferous tree species (i.e., slash pine, hoop pine and kauri pine) and a Eucalyptus species in subtropical Australia. We measured soil extractable organic C (EOC) and N (EON) contents and total C and N stocks under different tree species on the forest floor and along a soil profile to 100 cm depth. The results showed that Eucalyptus had significantly higher soil EOC contents (3...
August 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28801749/cancer-risk-assessment-of-polycyclic-aromatic-hydrocarbons-in-the-soils-and-sediments-of-india-a-meta-analysis
#10
Abhrajyoti Tarafdar, Alok Sinha
A carcinogenic risk assessment of polycyclic aromatic hydrocarbons in soils and sediments was conducted using the probabilistic approach from a national perspective. Published monitoring data of polycyclic aromatic hydrocarbons present in soils and sediments at different study points across India were collected and converted to their corresponding BaP equivalent concentrations. These BaP equivalent concentrations were used to evaluate comprehensive cancer risk for two different age groups. Monte Carlo simulation and sensitivity analysis were applied to quantify uncertainties of risk estimation...
August 11, 2017: Environmental Management
https://www.readbyqxmd.com/read/28800978/modelling-landscape-dynamics-with-lst-in-protected-areas-of-western-ghats-karnataka
#11
T V Ramachandra, Setturu Bharath, Nimish Gupta
Forest ecosystems sustain biota on the earth as they are habitat to diverse biotic species, arrests soil erosion, play a crucial role in water cycle, sequester carbon, and helps in mitigating the impacts of global warming. Large scale land use land cover (LULC) change leading to deforestation is one of the drivers of global climate changes and alteration of biogeochemical cycles with significant consequences in ecosystem services and biodiversity. This has necessitated the investigation of LULC by mapping, monitoring and modelling spatio-temporal patterns and evaluating these in the context of human-environment interactions...
August 8, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28800695/long-term-impact-of-manuring-and-fertilization-on-enrichment-stability-and-quality-of-organic-carbon-in-inceptisol-under-two-potato-based-cropping-systems
#12
R K Yadav, T J Purakayastha, M A Khan, S C Kaushik
Soil organic matter (SOM) stability is a prerequisite for long-term C sequestration. The long-term effect of manuring and fertilization on stability of SOM in rice-potato-wheat (R-P-W) and maize-potato-onion (M-P-O) cropping systems was studied in an Inceptisol of semi-arid subtropical India. Soil samples were collected (0-15 and 15-30cm soil depths) from the following treatments: control, 100% NPK-Fertilizer, 100% N-Vermicompost (VC), 50% NPK-Fertilizer+50%N-Vermicompost (VC), 100%NPK-Fertilizer+crop residue (CR), 100% N-VC+CR...
August 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28799926/daily-runoff-prediction-using-the-linear-and-non-linear-models
#13
Alireza Sharifi, Yagob Dinpashoh, Rasoul Mirabbasi
Runoff prediction, as a nonlinear and complex process, is essential for designing canals, water management and planning, flood control and predicting soil erosion. There are a number of techniques for runoff prediction based on the hydro-meteorological and geomorphological variables. In recent years, several soft computing techniques have been developed to predict runoff. There are some challenging issues in runoff modeling including the selection of appropriate inputs and determination of the optimum length of training and testing data sets...
August 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28798755/pearl-millet-genetic-traits-shape-rhizobacterial-diversity-and-modulate-rhizosphere-aggregation
#14
Papa M S Ndour, Mariama Gueye, Mohamed Barakat, Philippe Ortet, Marie Bertrand-Huleux, Anne-Laure Pablo, Damien Dezette, Lydie Chapuis-Lardy, Komi Assigbetsé, Ndjido Ardo Kane, Yves Vigouroux, Wafa Achouak, Ibrahima Ndoye, Thierry Heulin, Laurent Cournac
Root exudation contributes to soil carbon allocation and also to microbial C and energy supply, which subsequently impacts soil aggregation around roots. Biologically-driven soil structural formation is an important driver of soil fertility. Plant genetic determinants of exudation and more generally of factors promoting rhizosphere soil aggregation are largely unknown. Here, we characterized rhizosphere aggregation in a panel of 86 pearl millet inbred lines using a ratio of root-adhering soil dry mass per root tissue dry mass (RAS/RT)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28797944/siderophore-mediated-iron-removal-from-chrysotile-implications-for-asbestos-toxicity-reduction-and-bioremediation
#15
Sanjay K Mohanty, Cedric Gonneau, Ashkan Salamatipour, Ralph A Pietrofesa, Brenda Casper, Melpo Christofidou-Solomidou, Jane K Willenbring
Asbestos fibers are highly toxic (Group 1 carcinogen) due to their high aspect ratio, durability, and the presence of iron. In nature, plants, fungi, and microorganisms release exudates, which can alter the physical and chemical properties of soil minerals including asbestos minerals. We examined whether exudates from bacteria and fungi at environmentally relevant concentrations can alter chrysotile, the most widely used asbestos mineral, and lower its toxicity. We monitored the release of iron from chrysotile in the presence of organic acid ligands and iron-specific siderophores derived from bacteria and fungi and measured any change in fiber toxicity toward peritoneal macrophages harvested from mice...
July 22, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28797062/why-organic-resources-and-current-fertilizer-formulations-in-southern-africa-cannot-sustain-maize-productivity-evidence-from-a-long-term-experiment-in-zimbabwe
#16
Tongai J Mtangadura, Florence Mtambanengwe, Hatirarami Nezomba, Jairos Rurinda, Paul Mapfumo
Sustainability of maize-based cropping systems is a major challenge for southern Africa, yet the demand for maize as staple food and animal feed in the region continues to increase. A study was conducted on a sandy clay loam (220 g clay kg-1 soil) at Domboshawa in Zimbabwe to investigate the long-term effects of organic resource quality and application rate, and nitrogen (N) fertilization on soil chemical properties and maize (Zea mays L.) productivity. Crotalaria juncea (high quality), Calliandra calothyrsus (medium quality), cattle manure (variable quality), maize stover and Pinus patula sawdust (both low quality) were incorporated into soil at 4...
2017: PloS One
https://www.readbyqxmd.com/read/28796821/legacy-of-historic-ozone-exposure-on-plant-community-and-food-web-structure
#17
M Alejandra Martínez-Ghersa, Analía I Menéndez, Pedro E Gundel, Ana M Folcia, Ana M Romero, Jennifer B Landesmann, Laura Ventura, Claudio M Ghersa
Information on whole community responses is needed to predict direction and magnitude of changes in plant and animal abundance under global changes. This study quantifies the effect of past ozone exposure on a weed community structure and arthropod colonization. We used the soil seed bank resulting from a long-term ozone exposure to reestablish the plant community under a new low-pollution environment. Two separate experiments using the same original soil seed bank were conducted. Plant and arthropod richness and species abundance was assessed during two years...
2017: PloS One
https://www.readbyqxmd.com/read/28794453/varying-sensitivity-of-mountainous-streamwater-base-flow-formula-see-text-concentrations-to-n-deposition-in-the-northern-suburbs-of-tokyo
#18
Kazuya Nishina, Mirai Watanabe, Masami K Koshikawa, Takejiro Takamatsu, Yu Morino, Tatsuya Nagashima, Kunika Soma, Seiji Hayashi
Ecosystems of suburban landscapes (i.e., forest, inland water ecosystem) are threatened by high nitrogen (N) loadings derived from urban air pollutants. Forest ecosystems under high chronic N loadings tend to leach more N via streams. In the northern suburbs of Tokyo, N deposition loading on terrestrial ecosystems has increased over the past 30 years. In this region, we investigated nitrate concentrations in 608 independent small forested catchment water samples from northeastern suburbs of Tokyo. The nitrate concentrations varied from 0...
August 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28794217/pollination-benefits-are-maximized-at-intermediate-nutrient-levels
#19
Giovanni Tamburini, Francesco Lami, Lorenzo Marini
Yield production in flowering crops depends on both nutrient availability and pollination, but their relative roles and potential interactions are poorly understood. We measured pollination benefits to yield in sunflower, combining a gradient in insect pollination (0, 25, 50, 100%) with a continuous gradient in nitrogen (N) fertilization (from 0 to 150 kg N ha(-1)) in an experiment under realistic soil field conditions. We found that pollination benefits to yield were maximized at intermediate levels of N availability, bolstering yield by approximately 25% compared with complete pollinator exclusion...
August 16, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28791504/the-effects-of-grazing-intensity-on-soil-processes-in-a-mediterranean-protected-area
#20
Evaggelia Panayiotou, Maria Dimou, Nikolaos Monokrousos
We investigated the temporal and among-site differentiation of soil functionality properties in fields under different grazing intensities (heavy and light) and compared them to those found in their adjacent hedgerows, consisting either of wooden shrubs (Rubus canescens) or of high trees (Populus sp.), during the cold and humid seasons of the year. We hypothesized that greater intensity of grazing would result in higher degradation of the soil system. The grazing factor had a significant effect on soil organic C and N, microbial biomass C, microbial biomass N, microbial activity, and β-glucosidase, while acid phosphatase and urease activity were not found to differ significantly among the management systems...
August 8, 2017: Environmental Monitoring and Assessment
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