Question
Explain the mechanism of compost formation.
✓
Answer
Mechanism of compost formation:
- A trench of dimension of 4 to 5m long, 1.5 to 1.8m broad and 1.0 to 1.8m deep is dug.
- A layer of well mixed refuse of about 30cm thickness is spread in the trench.
- The refuse layer is well moistened by slurry of cow dung, earth and water.
- Now, a second layer of well mixed refuse is spread in trench till the heap rises to a height of 45 to 60cm above the ground level.
- The top of the heap is covered with a thin layer of moist earth.
- After three months, the material is taken out of the trench and placed in the form of conical heap. The conical heap, if required, be suitably moistened and should be covered with earth.
- Conical heap is left undisturbed for about one to two months. After this period, compost can be used in crop fields.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Figure X showa a trace of a sound wave produced by a particular tuning fork:
- On the graph paper given in Figure Y, draw a trace of the sound wave which has higher frequency than that shown in Figure X.
- On the graph paper shoen in Figure Z, draw a trace of the sound wave which has a larger amplitude than that shown in Figure X.
Give two examples each of longitudinal waves and transverse waves.
Describe structure and functions of bone.
Describe structure of a chromosome.
What is crystallisation? How can this technique be used to purify impure copper sulphate?
How will you separate the components of a mixture containing two miscible liquids? Give experimental details.
If $1$ gram of sulphur dioxide contains $x$ molecules, how many molecules will be present in $1$ gram of oxygen$?$
$(S = 32u; O = 16u)$
→$(S = 32u; O = 16u)$
A girl of mass $50\ kg$ jumps out of a rowing boat of mass $300\ kg$ on to the bank, with a horizontal velocity of $3\ m/s.$ With what velocity does the boat begin to move backwards?
→The following data was obtained for a body of mass $1\ kg$ dropped from a height of $5$ metres:
Show by calculations that the above data verifies the law of conservation of energy $($Neglect air resistance$).$ $(g = 10\ m/s^2).$
→|
Distance above ground
|
Velocity
|
|
| $i.$ | $5m$ | $0m/s$ |
| $ii.$ | $3.2m$ | $6m/s$ |
| $iii.$ | $0m$ | $10m/s$ |
How will you separate a mixture of common salt, sulphur powder and sand?