9 results for group: minerals


Carbonate precipitation in artificial soils as a sink for atmospheric carbon dioxide

Turnover of C in soils is the dominant flux in the global C cycle and is responsible for transporting 20 times the quantity of anthropogenic emissions each year. This paper investigates the potential for soils to be modified with Ca-rich materials (e.g. demolition waste or basic slag) to capture some of the transferred C as geologically stable CaCO3. To test this principal, artificial soil known to contain Ca-rich minerals (Ca silicates and portlandite) was analysed from two sites across NE England, UK. The results demonstrate an average C content of 30 ± 15.3 Kg C m−2 stored as CaCO3, which is three times the expected organic C ...

How will minerals feed the world in 2050?

By 2050, the world’s population will have reached 9 billion. To feed that many people, soil fertility will have to be maintained artificially. All fertiliser materials depend on a geological resource: nitrogen (N) fertilizer production needs fossil fuels, and both phosphate (P) and potassium (K) are derived by mining. Irrespective of new biological techniques in plant breeding and genetic modification, soils still need to supply the mineral nutrients that plants require, and these are exported from soil with every harvest. Studies of global offtake of N, P and K from soils through crop production show that although N and P are roughly in ...

Possibilities for Development of the Wood and Forestry Economy in Germany that Include Remineralization

Schwalm-Eder County in North Hesse is especially noteworthy for forestry research because of the potential for developing reforestation on a large scale, especially for the transformation of agricultural land into forests. There is so much overproduction in the agricultural Common Market that about 70% of the agricultural budget of $25 billion is used for the storage of overproduction or for the destruction of it. This has to lead at some point to less intensive agricultural production. The Common market now covers only 40% of its wood requirement; and aside from Japan, the Common Market countries import the most tropical wood, especially from West ...

Applications of Diabase Rock Dust in Brixlegg Forest

Foresters are applying lime in the Austrian forests against acid rain. They know that lime is too alkaline and destroys the humus because it destroys the acid-alkaline balance. Lime destroys the nitrogen compounds in the humus and it leaches nitrogen into the water which is a pollutant. Measurements show that with acid rain comes about 40, 50, 60 kilos of nitrogen per hectare.

The Weathering Properties of Silicate Rock Dust Under Laboratory Conditions

The ion exchange of the primary minerals is one of the central topics from the perspective of geological and soil scientific studies as well as papers concerning plant nutrition. The latter has been given great importance in the last years and decades as can be seen from the numerous publications addressing this theme. Today primary broadspectrum minerals hardly play a role as a carrier of nutrients in conventional agriculture

Pot Test Trial II of Basalt, Serpentine, Bentonite, Feldspar, and Kaolin

This is a report on the second set of pot test trials run by Dr. Gernot Graefe at the Gartnerhof in Ganserndorf Sud near Vienna.

Compensational Fertilization with Silicate Rock Dust For Buffering Damaged Forest Soils: First Experential Report

The fertilization of forest areas has increased substantially in recent years. In all, since 1982 over 500,000 hectares of forest were fertilized which is more than 7% of the forest area (in Germany). On about 95% of the areas fertilized in 1988, magnesium-containing lime (various types such as dolomite, limestone, etc.) was applied. On about 15% of the area, additional fertilization with several minerals, containing potassium and phosphorus were applied, in addition to the limestone.

Effect of Silicate Rock Dust in Forests: Result of the Experiments in the Forest of Arenberg-Schleiden after Five Years

The advantage of rock dust is that it is a natural, raw material, and carrier of numerous minerals and trace elements with long term effect. The nutrients are released slowly and gently during the process of natural weathering in the forest ecosystem (without fertilization shock). In the following, we report the latest results of the experiments in the forest of Arenberg-Schleiden.

A Technique Called N-Viro Soil Remineralization Using Sewage Sludge Mixed with Cement Kiln Dust

Roughly 140 billion pounds of sewage sludge are produced annually in the U.S. in an attempt to separate our human wastes from the waters we mix them with. This number has steadily increased over the last two decades as more stringent waste water treatment regulations have been put into effect. Standard methods for dealing with sludge have included incineration, ocean dumping, landfilling, land application on farms and composting.