SULFUR CYCLE Sulfur is one of the most abundant elements on the earth. Sulfur is a yellow, brittle, tasteless, odourless non-metal. Sulfur is present in all kinds of Proteins. Plants directly absorb Sulfur-containing Amino acids such as Methionine, Cystine and Cysteine. Sulfur is released into the atmosphere by the (i) Burning of Fossil fuels; (ii) Volcanic activities and (iii) Decomposition of Organic molecules. On land, Sulphur is stored in underground rocks and minerals. It is released by Precipitation, Weathering of rocks and Geothermal vents. Photosynthetic and Chemosynthetic microorganisms contribute the environmental Sulfur cycle. STEPS INVOLVED IN SULFUR CYCLE The sulfur cycle describes the movement of Sulfur through the atmosphere, mineral forms, and through living things. Microbial transformations of Sulfur are even more complex than those of Nitrogen because (i) Large number of Oxidation states of Sulfur and (ii) Several transformations of Sulfur a...