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You are here: Home / Science / How many different types of minerals and nutrients do Plants need to grow?

How many different types of minerals and nutrients do Plants need to grow?

February 18, 2020 by Karen Hill

Plants in general are made up almost entirely of compounds of carbon, hydrogen, and oxygen, compounds that chemists refer to as organic, with no relation to the word used to designate foods that conform to the USDA’s National Organic (Foods) Program.

Minerals, on the other hand, are the seventeen inorganic chemical elements that are essential nutrients for plants. Agricultural soils must contain all of them, either inherently or added as fertilizer.

Six of these seventeen elements, the so-called macronutrients, potassium, nitrogen, phosphorus, sulfur, magnesium, and calcium, are required by plants in rather large amounts. Without any one of them, plants would grow abnormally or not at all.

The other eleven essential elements, iron, manganese, zinc, copper, molybdenum, cobalt, nickel, sodium, boron, chlorine, and silicon, are called micronutrients because they are needed by plants in only trace amounts. The distribution of these elements around the Earth is more spotty, and that’s one way in which dissimilarities might arise among otherwise identical crops.

When we say that a certain element is present in the soil for a plant to absorb and utilize, that doesn’t mean that the element is present in its elemental form, that is, as free atoms, not combined into compounds with other elements. They are indeed present as compounds. The iron, for example, isn’t present as metal; it is present as compounds with oxygen and other elements (that is, in an oxidized form).

Nevertheless, and quite surprisingly, when you see “reduced iron” among the ingredients of a breakfast cereal, it is actually present as tiny particles of metallic iron.

Reduced is the chemical opposite of oxidized. You won’t have to stay away from magnets after breakfast, however, because the finely divided particles dissolve promptly in the hydrochloric acid in your stomach.

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Filed Under: Science

About Karen Hill

Karen Hill is a freelance writer, editor, and columnist. Born in New York, her work has appeared in the Examiner, Yahoo News, Buzzfeed, among others.

Previous Post: « How much Iron does Spinach contain and Is Spinach really a good source of Iron?
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