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Silver-white, very brittle heavy metal or element (Mn). In nature, it often occurs in combination with iron in many minerals. These are e.g. manganite, manganese dioxide, manganite and iron ore (picture left). For the vine, manganese is important as a nutrient in small quantities. It is involved in carbohydrate and protein metabolism, as well as in the formation of cell membranes and supports photosynthesis. There are close interrelationships between manganese and iron in the metabolism of plants. Alkaline soils with high pH values are most likely to be deficient in plant-available manganese. Similarly, high levels of calcium also inhibit uptake and transport in the plant. The picture on the left (cube) shows a 99.9% pure manganese, the picture on the right rhodochrosite (rose spar) a frequently occurring manganese carbonate.

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Thomas Götz
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The world's largest Lexicon of wine terms.

26,076 Keywords · 46,829 Synonyms · 5,324 Translations · 31,411 Pronunciations · 186,850 Cross-references
made with by our author Norbert F. J. Tischelmayer. About the Lexicon