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Geotechnical Properties Of Ajali Sandstone In A...
39,90 € *
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Twelve soil samples were collected at different interval from 0.1 meter deep in Onyeama Mine in Enugu State from the Ajali Sandstone. These were subjected to geotechnical analysis to determine their suitability for the location of some engineering structures. Test carried out on these sample include moisture content, sieve analysis and Atterberg's Limits. Results of these analysis show that the soil are cohesive at shallow depths (1.8m - 1.0m) and cohesionless and sandy fraction at greater depths (0.8m - 0.0m). The moisture content ranges between 9.44% to 11.86% averaging 10.65% (from depth 1.8m - 1.1m). It ranges from 8.83% - 12.71%, depth 1.0m - 0.6m, it ranges from 8.17% - 14.60%, and depth 0.5m - 0.3m ranges from 7.88% - 13.10%. These show low values. For the Atterberg limit, liquid limit and plastic limit, plasticity indices of the cohesive portion ranges between 26.9% - 18.3% and 3.5% - 10.6% respectively. AASHTO classification and a plasticity chart part of these results show that the top soils at shollow depths (1.8m - 1.0m) are inorganic clays. Thus, it is important that the top inorganic layer be stabilized or excavated and back filled with more stable material.

Anbieter: buecher
Stand: 22.02.2020
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Geotechnical Properties Of Ajali Sandstone In A...
41,10 € *
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Twelve soil samples were collected at different interval from 0.1 meter deep in Onyeama Mine in Enugu State from the Ajali Sandstone. These were subjected to geotechnical analysis to determine their suitability for the location of some engineering structures. Test carried out on these sample include moisture content, sieve analysis and Atterberg's Limits. Results of these analysis show that the soil are cohesive at shallow depths (1.8m - 1.0m) and cohesionless and sandy fraction at greater depths (0.8m - 0.0m). The moisture content ranges between 9.44% to 11.86% averaging 10.65% (from depth 1.8m - 1.1m). It ranges from 8.83% - 12.71%, depth 1.0m - 0.6m, it ranges from 8.17% - 14.60%, and depth 0.5m - 0.3m ranges from 7.88% - 13.10%. These show low values. For the Atterberg limit, liquid limit and plastic limit, plasticity indices of the cohesive portion ranges between 26.9% - 18.3% and 3.5% - 10.6% respectively. AASHTO classification and a plasticity chart part of these results show that the top soils at shollow depths (1.8m - 1.0m) are inorganic clays. Thus, it is important that the top inorganic layer be stabilized or excavated and back filled with more stable material.

Anbieter: buecher
Stand: 22.02.2020
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Horny for the Ranch Hand: A Cowgirl Anal Sex Th...
9,95 € *
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Two sexy cowgirls make one cowboy very, very happy, and they use every hole to do it! Sandy and Tory have their eyes on Gavin, the new stable worker. He has a way with horses, but the cowgirls are much more interested in what other talents he might have. When the opportunity arises, life on the ranch heats up. In fact, the whole place is about to explode into a cowgirl threesome complete with hot anal sex action! Warning: This audiobook contains very graphic depictions of sexual activity during a threesome with two cowgirls and one cowboy. It includes oral sex, lesbian sex, mmf sex, and anal sex. It is intended for mature readers who will not be offended by explicit descriptions of sex acts between consenting adults. 1. Language: English. Narrator: Sapphire Rose. Audio sample: http://samples.audible.de/bk/acx0/013823/bk_acx0_013823_sample.mp3. Digital audiobook in aax.

Anbieter: Audible
Stand: 22.02.2020
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Our Earth, Our Species, Our Selves: How to Thri...
9,95 € *
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Winner of the 2018 Green Book Festival Award for General Nonfiction, the 2018 New York Book Festival Award for General Nonfiction, and the 12th Annual National Indie Excellence Award for Environment.  Our current environmental crises - most notably, climate change - call on us to upgrade to a new way of life that will sustain us and our world far into the future. When you listen to this timely, accessible, and thought-provoking book, you will discover: We already have the capacities and tools to create a health and environmental revolutionSpecific actions you and I can take now that will help us and our world prosper - not just in the future, but immediatelyHow the strategies shared in this book can uplift our society and democracyWhy creating a high-tech and high-nature way of life could spark an economic boom  Our scarcest resource is time. With determination and action, we can implement solutions rather than sit on the sidelines suffering harmful impacts. We deserve, and can have, better health and a cleaner environment, a stable climate, healthy ecosystems, sustainable use of resources, and less need for damage control. We have so much to gain. Through science and stories, Our Earth, Our Species, Our Selves makes the case for hope, optimism, and practical solutions we can take individually and collectively to green our technology, green our economy, strengthen our democracy, and create social equality. Our Earth, Our Species, Our Selves will empower you to know we can meet our challenges and inspire you to take effective actions you'll want to take.  1. Language: English. Narrator: Sandy Vernon. Audio sample: http://samples.audible.de/bk/acx0/084734/bk_acx0_084734_sample.mp3. Digital audiobook in aax.

Anbieter: Audible
Stand: 22.02.2020
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Learning from the Impacts of Superstorm Sandy
76,50 € *
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Learning from the Impacts of Superstorm Sandy summarizes first results from studies of Superstorm Sandy, including: tide gauge measurements of storm surge, stable isotope variation in precipitation, analysis of the effect of beach nourishment among other factors on structural damage, and comparison with past storms through sediment analysis. This book gives a multi-dimensional treatment of scientific results of studies of Superstorm Sandy, and it is a valuable reference for oceanographers, coastal geologists, climatologists, dynamic meteorologists, paleotempostologists, sedimentary geologists, geomorphologists and emergency managers who need to better understand the storm and its effects in order to be prepared for similar events in the future.Summarizes first results from studies of Superstorm SandyGives a multi-dimensional treatment of scientific results of studies of Superstorm Sandy

Anbieter: Dodax
Stand: 22.02.2020
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CARBON AND NITROGEN REDISTRIBUTION ACROSS THE L...
30,98 € *
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As a result of demographic pressure, governmental policies and improved market access, agricultural practices were intensified in the tropical mountainous areas of Southeast Asia. Side effects are water erosion and landslides on steep slopes creating tremendous sediment fluxes in these mountainous headwater systems. The construction of reservoirs allowed storing rainfall and runoff water in order to feed irrigation systems, supporting a second rice crop outside of the rainy season. In the rainy season these systems act as a sediment conveyor transporting and re-allocating nutrients in the lowland. The goal of this thesis which was to: (i) trace and quantify sediment associated organic carbon and total nitrogen fluxes in irrigation water, (ii) assess whether sediment deposition enhances soil spatial variation and crop performance along toposequences of paddy rice terraces and (iii) to understand the influence of flooding events on farmers’ perception in relation to agricultural practices and adaptation of mitigation strategies.The study showed the importance of irrigation management on nutrient reallocation in the lowland and estimated that the reservoir accounted for more ten 93% of these C and N loads. Paddies close to the irrigation channel received less nutrient rich sediment, which resulted in a decrease of SOC and Total N content and an increase in sand fraction. Grain yield measurements followed the same pattern as the soil spatial variation found in the rice fields. However, sediment delivery via flooding (or direct runoff, in the case of rainfed paddies) strongly decreased soil fertility and crop productivity as these were nutrient poor - sandy sediments. Individual farmers’ willingness to adopt mitigation strategies was influenced by the economic impact of flooding at household level, external factors (e.g. climatic factors, water management failures) and a lack of understanding of the linkage between upland and lowland agricultural practices. Successful implementation of soil conservation techniques therefore will depend highly on local policy makers as they need to invest in raising farmers’ awareness regarding upland-lowland linkages and providing appropriate incentives. As the understanding of nutrient redistribution processes is not straight forward and has a high spatio-temporal character, this work showed that the combination of stable isotope techniques, field measurements and mixed models helped in understanding the linkage between upland erosion and lowland sedimentation and moreover on crop productivity at toposequence level. The assessment of nutrient enrichment and depletion regions within the lowland can be used in designing site-specific fertilizer and water management practices. Furthermore, the identification of the processes behind nutrient redistribution allows modelers and policy makers to better assess the impact of land use change on ecosystems.

Anbieter: Dodax
Stand: 22.02.2020
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Influence of potassium and zinc on wheat crop a...
71,90 € *
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Wheat is an important stable foodgrain crop and being the main source of calories it has immense importance in Indian diet. Sandy soils of Rajasthan are excessively permeable, poor in organic matter and prone to be deficient in potassium and zinc availability. An intensive cropping lead to depletion of potassium from the soil due to it's released from fixed forms. Besides, a greater emphasis on nitrogen fertilization corresponding to potassium is influence soil fertility, crop yields and sustainability of agriculture. Already a fall in productivity in the absence of potassium has been proven from long-term experiments. Like potassium, more attention is also necessary on the management of micro-nutrients especially zinc. Zinc is an important micro-nutrient reported deficient in Indian soils and cause poor yield in rice-wheat growing soils of North-western India. When potassium and zinc are applied to soil they undergo transformation to various chemical pools, the nature of which differs across soils. Looking to the role played by potassium and zinc in boosting up the productivity and quality of wheat and soil health the present study was undertaken.

Anbieter: Dodax
Stand: 22.02.2020
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Nitrogen Fixing bacteria in soil
51,90 € *
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Recently, a great attention is paid for desert soil reclamation and cultivation . New structure of reclaimed soil is made by exo-polysaccharides, which produced by some rhizobacterial cells to keep water retention and nutrient . Nitrogen fixing bacteria can substitute some of the mineral nitrogen to reduce the loose of mineral nitrogen and its worse impact on the environment. Some of nitrogen fixing bacteria produce extracellular polysaccharides (EPS) ,the presence of exo-polysaccharides are likely to be attractive to plant roots and colonized the root in the rhizosphere area . Also , these exo-polysaccharides play role in improve the texture of sandy soil by cement particles .This book has different goal which is evaluate the potential of bacterial isolates which produces exopolysaccharides (EPS) and studied characterization of these exo-polysaccharides , this characteristic is responsible for stable aggregates in soil . In addition to evaluate the effect of biofertilization on the growth of wheat and faba bean plants . Therefore This book , should be especially useful to professionals in agricultural field ,farmer's , big farmers and research fertilizers company , or anyone.

Anbieter: Dodax
Stand: 22.02.2020
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Estimation of Evapotranspiration Rates in Irrig...
36,24 € *
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Agriculture in Uzbekistan critically depends on water resources availability, therefore crop production, especially of cotton and winter wheat, is restricted mainly to irrigated areas. As a result of water shortage under climate change, land degradation issues in the region worsened and water use efficiency has considerably decreased over the decades. Hence, it is essential to investigate water balance parameters in irrigated lands.Environmental isotopes have been widely applied in hydrological investigations, particularly estimation of evapotranspiration rate, one of the main components of the water balance in irrigated lands.This study aims to estimate evapotranspiration rates in cotton fields by applying water stable isotopes (2H and 18O). The study is based on the field experiments conducted during the vegetation periods 2010 and 2011 in the Fergana Region of Uzbekistan. Soil for isotope analysis were sampled in a sandy field, sandy loam #1 field (rich with gypsum) and sandy loam #2 field (without gypsum). The soil water from the samples was extracted by the cryogenic extraction method. δ2H and δ18O ratios of extracted water were determined using the laser spectroscopy method. Evapotranspiration rates were estimated with the isotope mass balance model. Besides evapotranspiration estimation, this study examines the variability and characteristics of stable isotope signatures of different water sources in the study region and analyzes water extraction processes from different soil types and temporal changes of isotope signatures through the depth in irrigated cotton fields.

Anbieter: Dodax
Stand: 22.02.2020
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