Iron deficiency in soils and plants
Iron deficiency is a problem in calcerous soils, in arid soils, and in soils cropped to high iron-demand plants (shrubs, fruits, corn, soybean, sorghum, etc.). Broadleaved plants that are iron deficient Show the typical interveinal chlorosis-light-coloured areas between the darker veins on young leaves.
You can determine iron levels in leaves by spectrophometric methods or by atomic absorption methods.
There are many methods developed to determine levels of iron in plants, stems, soil, etc.
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