Soil Fertility and Nutrient management (1+1)

Micronutrients Cycle and their Transformations in soil

 
• Micro or trace elements in soil are derived from the parent materials and natural deposition from the atmosphere, organic manures and fertilizers. Trace elements are largely bound in mineral lattices, to be released by weathering. Iron, Cu, Mn, Zn, Co, Mo, Ni and Cr occur in ferromagnesian minerals common in ultrabasic and basic igneous rock.
  
• The total content of Fe, Mn, Zn, Cu, Co, Cl & B varies considerably in different soils. Except Zn, Cu and B, all other micronutrients (Fe, Mn, Cl, Mo) are present in Indian soils in sufficient amounts to sustain agricultural productivity. Zn and Boron deficiency is found in all the soils of agro ecological regions of the country. The availability of micronutrient cations in soil is highly affected by inorganic ions in soil solution, soil solid constituents like free oxides of Fe & Al, soil organic matter, fertilizers and amendments applied to soil.

Micronutrients Cycle