Автор: Prahlad Maurya Название: Transport & Fate of Chemicals in Soils: Principles & Applications ISBN: 1681170191 ISBN-13(EAN): 9781681170190 Издательство: Gazelle Book Services Рейтинг: Цена: 257400.00 T Наличие на складе: Невозможна поставка. Описание: The weathering of the parent material by water determines, to a large extent, the chemical composition of the soil which has ultimately been produced. Some chemicals are leached into the lower soil layers where they accumulate. Other chemicals, more insoluble, are left in the upper layers of the soil. The most rapid removed chemicals are chlorides and sulphates, followed by calcium, sodium, magnesium and potassium. The silicates and oxides of iron and aluminium decompose very slowly and are rarely leached. When some of these products come into contact with the air in the soil, chemical reactions occur, such as oxidation in particular, which results in the formation of chemicals either more soluble or more fragile than the original ones. This results in an acceleration of the weathering processes, increased leaching* of chemicals, and further changes in the soil chemical composition. A freshwater acid sulphate soil may develop when the waterlogged soil containing iron sulphurs (pyrites) is exposed to the air, for example, when constructing ponds.
Автор: Martin Hertz Название: Unsaturated Soils: Behavior, Mechanics and Conditions ISBN: 1536159859 ISBN-13(EAN): 9781536159851 Издательство: Nova Science Рейтинг: Цена: 89750.00 T Наличие на складе: Невозможна поставка. Описание: This compilation opens with an exploration of the vadose, or unsaturated zone, which is of utmost importance as the nexus between surface water and groundwater. It is the link between what happens on the surface and what happens below, inside the aquifers. As such, understanding this underground natural environment is essential for the sustainable development of society. Due to the complexities involved in considering the hysteretic response of the Soil Water Characteristic Curve and its dependency on volume changes, these two features are often ignored in numerical studies of unsaturated soils. To facilitate their use in numerical modeling, a model for the Soil Water Characteristic Curve equation based on the bounding surface concept is proposed. The authors go on to focus on the temperature distribution and water migration in unsaturated soil, which is of significant importance because these factors are related to the thermal-physical properties of soil. The changes in these properties may cause disastrous engineering problems such as the cracking of pavement, damage of structure foundation and fracture of pipelines. Lastly, the book addresses the measurement and expression of the mass chemical potential in the presence of superficial layers induced by a complex structure. By definition, the mass chemical potential of a constituent in a soil represents the variation of the internal energy of the medium when a unit mass of the constituent is transferred to a reference state with the entropy, volume and mass of the other constituents remaining constant.
Автор: Sanjay Sawant Название: Nature, Properties and Management of Saline and Alkali Soils ISBN: 1681170809 ISBN-13(EAN): 9781681170800 Издательство: Gazelle Book Services Рейтинг: Цена: 230210.00 T Наличие на складе: Невозможна поставка. Описание: There is a great variety in their physical, chemical and biological properties, but they can be made to yield a good crop by adopting proper management practices and soil and water conservation measures, applying organic manures and chemical fertilizers and supplementing monsoon rain with irrigation water. But there are some extreme soil conditions which do not provide a suitable medium for the growth of plants and desirable microorganisms. Such soils are either too acidic or alkaline and special measures have to be adopted to bring them in proper condition before any crop can be raised on them satisfactory and economically. In high rainfall areas, acidic soils are formed due to leaching of bases or salts. In arid regions where rainfall is low and temperature high, soils become saline or alkaline due to alkaline due to accumulation of salts in the surface soil. Micro-organisms decompose organic matter in the soil and organic acids are continuously being formed. If these acids are not neutralized by free lime or bases to make the soil acidic.
Автор: Soils United States Bureau of Название: Soil Survey ISBN: 1318676975 ISBN-13(EAN): 9781318676972 Издательство: Неизвестно Цена: 8230.00 T Наличие на складе: Невозможна поставка.
Автор: Pushpika Freitas Название: Heavy Metals in Soils and Plants ISBN: 1681170698 ISBN-13(EAN): 9781681170695 Издательство: Gazelle Book Services Рейтинг: Цена: 257400.00 T Наличие на складе: Невозможна поставка. Описание: Soil, one of the most important natural resources, is becoming degraded due to anthropogenic activities such as mining, agricultural activities, sewage sludge, fossil fuel combustion, metallurgical and chemical industries and electronics. Soil is a crucial component of rural and urban environments, and in both places land management is the key to soil quality. This series of technical notes examines the urban activities that cause soil degradation, and the management practices that protect the functions urban societies demand from soil. This technical note focuses on heavy metal soil contamination. Mining, manufacturing, and the use of synthetic products e.g. pesticides, paints, batteries, industrial waste, and land application of industrial or domestic sludge can result in heavy metal contamination of urban and agricultural soils. Heavy metals also occur naturally, but rarely at toxic levels.
Автор: Dmytruk Yuriy, Dent David Название: Soils Under Stress: More Work for Soil Science in Ukraine ISBN: 3030683931 ISBN-13(EAN): 9783030683931 Издательство: Springer Цена: 93160.00 T Наличие на складе: Есть у поставщика Поставка под заказ. Описание: As a sequel to Soil Science Working for a Living: Applications of soil science to present-day problems, we consider issues of policy as well as soil genesis, attributes and functions in various environments, natural and man-made.
Автор: Soi Martha Название: Widowhood: My Journey ISBN: 1973696061 ISBN-13(EAN): 9781973696063 Издательство: Неизвестно Рейтинг: Цена: 18170.00 T Наличие на складе: Есть у поставщика Поставка под заказ. Описание:
When the foundation of your world is shaken, what can one do?
Experience a journey of a woman widowed at a young age in a patrilineal society, an environment that limits choices about her future. Through sheer handwork, determination and faith in God, she is able to balance societal, Christian and personal values and stand for not only herself but for her children too.
Автор: R E Hester, R M Harrison Название: Soils and Food Security ISBN: 1849734267 ISBN-13(EAN): 9781849734264 Издательство: ORCA BOOK SERVICES Рейтинг: Цена: 92950.00 T Наличие на складе: Есть у поставщика Поставка под заказ. Описание: This book, the 35th volume of Issues in Environmental Science and Technology, examines the current status of soils across the globe and their potential for food production to meet the needs of the World`s population in the 21st Century.
Автор: Alexander Earl B. Название: Soils in Natural Landscapes ISBN: 1466594357 ISBN-13(EAN): 9781466594357 Издательство: Taylor&Francis Рейтинг: Цена: 132710.00 T Наличие на складе: Есть у поставщика Поставка под заказ. Описание:
In any complete investigation of terrestrial ecosystems, rocks and soils must be considered. Soils are essential resources, providing water and nutrients for vascular plants, and mitigating the flow of water from the land. In addition, soil diversity is critical for biotic diversity. While there are many references on the agricultural perspective of soils, there is a need for a basic soils book for those concerned with natural landscapes and ecosystems. Soils in Natural Landscapes fills this niche, providing a thorough introduction to the physics, chemistry, and biology of soils and their roles in local to global systems.
The book begins by describing the field of soils and the major roles of soils in natural landscapes. The chapters that follow cover a range of topics:
Soil parent material
Architecture of soils
Temperature and soils
Water, air, and climate
Classification of soils
Soil landscapes
Plant nutrition
Soil organisms
Organic matter in soils
The author also discusses global issues such as water and carbon cycles, global warming, and acid rain. He addresses land management for different uses, soil quality, and soil degradation. Using an interdisciplinary approach, this book provides practical insights for the evaluation of soils in natural environments and their non-intensive management.
