Decomposition rate is slow, if detritus is rich in

Nitrogen

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Humus

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Sugars

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Lignin and chitin

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Water soluble substances

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Solution

The correct option is E Lignin and chitin
Decomposition is the process of breaking down organic matter into simple inorganic matter. Under same environmental conditions, the rate of decomposition various due to change in composition of detritus. If detritus is rich in lignin and chitin, the decomposition rate is slow. If detritus is rich in nitrogen, the decomposition rate is relatively high.
Thus, the correct answer is 'Lignin and chitin.'

Suggest Corrections

Column A	Column B
I. Humification	a. Percolation of water soluble inorganic nutrients into the soil
II. Leaching	b. Organic matter formed at consumer level
III. Secondary productivity	c. Process of decomposition of detritus to form a nutrient-rich dark coloured, amorphous substance