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Calcium is taken from the environment. In plant cells and tissues to be present in ionic form and the form of inorganic and organic combinations. Calcium cells fulfills a structural and functional role. Excess calcium green-sickness cause plant, due to the solubility and absorption of mineral compounds of iron, manganese.
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![]() ![]() One of the major mineral elements of plant nutrition. Nitrogen is found in soil so as combinations of organic and inorganic. Total nitrogen content can reach up to 0.5% of total dry substance of the soil, but more often this content oscillates around 0.1%. ![]() Sulfur is present in the soil as organic and mineral. Organic sulfur is the most important reserves of ground mineralization and progress to a more or less quickly depending on the activity of microorganisms. ![]() Iron must be present in the soil in a form assimilable otherwise occurs deficiency manifested by green-sickness. Iron deficiency is associated with a yellowing of leaves. ![]() It is found in soil. Magnesium absorption by plants is conditioned by three main factors: the amount of land accessible, magnesium interactions with other elements and requirements of the plant. Insufficient magnesium produces necrosis of leaves. Magnesium accumulate in seeds, formed with phosphoric acid, fitina. ![]() Phosphorus is found in soil as organic and inorganic compounds. Soil organic phosphorus comes from the decomposition of organic residues from crop residues or organic fertilizers. |
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