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Question
How many of the following statements are true about humus?
I. It is highly susceptible to microbial action
II. It is dark and amorphous in nature
III. It serves as a reservoir of nutrients
IV. It decomposes very slowly
How many of the following statements are true about humus?
I. It is highly susceptible to microbial action
II. It is dark and amorphous in nature
III. It serves as a reservoir of nutrients
IV. It decomposes very slowly
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Solution
The correct option is C 3
The process of decomposition is the breakdown of complex organic materials present in dead remains of plants and animals into simple inorganic compounds. It is a major function of every ecosystem.
Detritus is the raw material for decomposition. The dead plant remains such as leaves, bark, flowers and dead remains of animals, including faecal matter, constitute detritus
Due to the enzymatic activity of fungi and bacteria upon detritus, there is accumulation of a dark amorphous substance called humus. This process is called humification.
Humus is a nutrient-rich dark coloured, amorphous substance. Humus is a huge reservoir of nutrients. Being highly resistant to microbial action, humus decomposes very slowly.
The humus is further degraded by some microbes and release of inorganic nutrients occurs by the process known as mineralisation.
Three statements (II, III and IV) are correct.
The process of decomposition is the breakdown of complex organic materials present in dead remains of plants and animals into simple inorganic compounds. It is a major function of every ecosystem.
Detritus is the raw material for decomposition. The dead plant remains such as leaves, bark, flowers and dead remains of animals, including faecal matter, constitute detritus
Due to the enzymatic activity of fungi and bacteria upon detritus, there is accumulation of a dark amorphous substance called humus. This process is called humification.
Humus is a nutrient-rich dark coloured, amorphous substance. Humus is a huge reservoir of nutrients. Being highly resistant to microbial action, humus decomposes very slowly.
The humus is further degraded by some microbes and release of inorganic nutrients occurs by the process known as mineralisation.
Three statements (II, III and IV) are correct.
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