![]() Plants uptake essential elements from the soil through their roots and from the air (consisting of mainly nitrogen and oxygen) through their leaves. ![]() There are 16 essential plant soil nutrients, besides the three major elemental nutrients carbon and oxygen that are obtained by photosynthetic plants from carbon dioxide in the air, and hydrogen, which is obtained from water. However, this principle does not account for the so-called beneficial elements, whose presence, while not required, has clear positive effects on plant growth.Ī nutrient that can limit plant growth according to Liebig's law of the minimum is considered an essential plant nutrient if the plant cannot complete its full life cycle without it. Some elements are directly involved in plant metabolism. ![]() There are several principles that apply to plant nutrition. Plant nutrition is the study of the chemical elements that are necessary for plant growth.
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