Generally, manganese on the ground is found under insoluble pH forms and high redox potentials. Between 200 and 300 ppm is the total average content that can be had in it. The manganese that we can find in the soil is caused by the decomposition of ferromagnesian rocks. This toxicity can occur with foliar levels greater than 1000 ppm of Mn. If given the presence, it coincides in crops with acidic soils and one of its symptoms is the appearance of brown spots on the leaves. This is because it is not a very mobile element in the plant, just like iron (Fe.)Īs for its excess, its presence is rare. It usually develops initially in young leaves in the form of chlorosis between the midribs. Manganese deficiency in the plant begins critically when it is placed at about 15 to 25 ppm on dry foliar weight. This content is lower in the rest of the plant, such as stems, fruits and roots. The content in leaves ranges from 30 to 500 ppm over dry weight. It can be absorbed by root and foliar route. The manganese in the plant is absorbed under the form Mn+2 and as a cheate. Regarding plants as well, occupying an important role in oxygen photosynthesis and therefore many of the fertilizers contain manganese in their formulation. Manganese is identified as trace element and therefore an essential chemical element for all life forms.Īt biological level, it is well known that in humans it is vital for the normal functioning of the immune system, the regulation of blood sugar and cellular energy, bone growth, etc. This element is found as a free element in nature, often in combination with iron in addition to many other minerals. Manganese is symbolized as Mn and as a chemical element has atomic number 25, being located in group 7 of the periodic table of the elements. One of the trace elements used in plant nutrition is agricultural manganese.
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