Titlebook: Effect of Heavy Metal Pollution on Plants; Metals in the Enviro N. W. Lepp Book 1981 Applied Science Publishers Ltd 1981 agriculture.cyclin

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可耕种

Cycling of Trace Metals in Ecosystems,ource of major nutrient cations is weathering of the materials underlying the ecosystem itself and of the rocks and soils to which it is connected by the hydrological cycle. In many cases ecosystems lose more calcium, magnesium, sodium and potassium to stream water output than they gain from the atm

罗盘

Impact of Metals on Ecosystem Function and Productivity,-contained entity. In his definition, Tansley (1935) emphasized the importance of interactions between the components of the ecosystem; a concept which led to a new impetus in ecological thought and research in attempting to understand the structure and dynamics of such systems.

易发怒

Trace Metals in Agriculture, parent material from which they are derived. Others may, for similar reasons or because the elements present occur in forms unavailable to plants, exhibit trace element deficiencies which have to be corrected by applications, either to the land or directly to the crop, of appropriate chemicals in o

摇曳

Reclamation of Metalliferous Mine Wastes, This has resulted from a combination of social, economic and technological factors, in particular the ever-increasing requirement for metalliferous minerals and the ability of modern mining and processing methods to economically exploit ore deposits containing very low concentrations of valuable me

摇曳

The Effect of Trace Elements on Lower Plants,ants have been described in a wide range of species from diverse habitats, but studies into the possible toxicity of these accumulations have been limited. Cryptogams may be subjected to high metal concentrations as the result of exposure to metal-rich man-effected or natural sources. Some examples

cardiovascular

Mechanism of Metal Tolerance in Higher Plants,pulations are said to be metal tolerant. This character has been found amongst both wild and crop species. Wild species often show differentiation into ecotypes which can vary in their degree of tolerance; some cultivars of various crop species also show variation in their degree of tolerances.

Ingredient

https://doi.org/10.1007/978-3-642-76903-0 for a range of problems in crop, animal and human health. Some 15 elements present in rocks and soils, normally in very small amounts, are essential for plant and/or animal nutrition. Boron, copper, iron, manganese, molybdenum, silicon, vanadium and zinc are required by plants; copper, cobalt, iodi

parasite

https://doi.org/10.1007/978-94-015-3516-8ls and vegetation, and if fact many are required by plants and animals as micronutrients. In addition, naturally occurring surface mineralizations can produce metal concentrations in soils and vegetation that are as high, or higher, than those found around man-made sources. The searches by prospecto