How does the oxidation state of metal ion affect the colour of the soil? Explain the effect of oxidized and reduced forms of elements on crops.
Soil color is mainly produced by the minerals present and by the organic matter content. Yellow or red soil indicates the presence of oxidized ferric iron oxides. Dark brown or black color in soil indicates that the soil has a high organic matter content. Wet soil will appear darker than dry soil. However, the presence of water also affects soil color by affecting the oxidation rate. Soil that has a high water content will have less air in the soil, specifically less oxygen. In well drained (and therefore oxygen rich soils) red and brown colors caused by oxidation are more common, as opposed to in wet (low oxygen) soils where the soil usually appears grey or greenish due to the presence of reduced (ferrous) iron oxide. The presence of other minerals
_____ ______ ___ _____ ___ _____ ___ ______ ______ _______ _____.
_______ __________ ________ __________ _____.
__________ _____ ______ ___ ___ __________ _________ _________ __________.
___ ________ ________ _______ ___ __________ _______ ____ ________ __________ __________.
__________ ______ _____ ________ __________ ______ _____ ____ ___ ______.
______ _________ _____ _______ ________ ______ ___ _______ ________ ______ ___ _________.
______ _____ ________ _____ _______ ______ ________ _____.
_________ ______ _________ _______ ___ ____ __________ ______.
__________ ________ __________ _________ ______ __________.
_______ _______ __________ __________ ____ ______ ____ _____.
___ ________ ___ ________ ________ _________ _________ _________ _________ ____ ______ ______.
_________ ________ _____ ___ _________ ______.
___ ______ __________ _____ ______ ____.
_________ ____ _____ _______ ___ _________ _______ ______ _________.
_______ _________ ______ ____ ________ _________ _________ __________ ________ _______.
_________ _________ __________ ____ ________.
__________ _________ ____ _______ ___.
_____ ______ ________ _______ ___ ____ _________ _________ _________ _____ ___.
__________ ___ ___ _____ ________ _______.
________ ____ _______ ________ _____ ____ ______ ____ ___ _____.
________ _______ ________ ________ _________ __________ ________ ___ ____.
___ _______ __________ ____ ______.
___ _____ _____ _______ ___ _______ __________ _______ __________ _______ ________.
________ ______ ____ _____ ______.
________ ______ _________ _________ _________ _____ _____ ________ _______ _________.
_________ ______ ________ ____ _______.
___ ___ ________ _______ __________ _______ _____ ____.
_______ _________ ______ ______ _______.
________ __________ ____ ___ _______ __________.
- Solved Assignments
- Study Notes
- Guess Papers
- Question Papers
✓ Unlock up to 60% of the answer
✓ No payment required