Question

What is used to line the canals, and why is this necessary? (2)
Why is the plantation being irrigated?
(iv) Why is the water level in the canal lower than the ground around it.
1.State two domestic uses of wood.
2.Explain how wood is used in industry and transport

1. What is sustainable forestry?
4.Why does Pakistan need to increase the area of irrigated
plantations?

(d) (i) Why is afforestation called 'a long-term investment?
[2]
(ii) What are the advantages and disadvantages of developing a
forest area for tourism?
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Answer 1

hi,

1-. Canal lining is the process hi of reducing seepage loss of irrigation water by adding an impermeable layer to the edges of the trench. ... Canal linings are also used to prevent weed growth, which can spread throughout an irrigation system and reduce water flow.

2. Irrigation is the process of providing plants

Answer 2

1. Concrete canal liner is frequently utilised because of its great structural durability. In order to keep costs down, non-reinforced concrete is frequently used to line canals.
2. For the purpose of producing fuelwood, posts, construction lumber, and fodder on a commercial scale, irrigated forest plantations can be constructed. The usage of more exacting fast-growing tree and shrub species is also made possible by irrigation procedures.
3. The water level in the canal lower than the ground around it because of excessive use and waste, as well as an increase in population that increases water demand.
4. Wood is utilised commercially in every country to build houses, make furniture, and create fencing. In the paper business, wood is also used to make paper. For building roads, wood is used. Wood is used as fuel in homes.
5. Additionally, wood is utilised in a number of manufacturing sectors to create items like toys, furniture, cabinetry, and equipment. The construction of walls, floors, subfloors, ceilings, and partitions in buses, cars, trucks, motorhomes, and railroad coaches is frequently done with wood.
6. The management of forests using sustainable development's guiding principles is known as sustainable forest management. Ecological, economic, and sociocultural balance are the three primary pillars that sustainable forest management must maintain.
7. Pakistan needs to increase the area of irrigated plantations because the irrigated plantations will be created, planted, and managed to provide wood, recover the land from salt and waterlogging, and give rural residents work.
8. Desertification can be prevented via reforestation, which improves soil quality and organic carbon levels. Additionally, afforestation slows global warming by increasing O₂ and decreasing CO₂ levels in the atmosphere. Thus, afforestation is called 'a long-term investment
9. The advantages include rising revenue, promoting cultural diffusion, and opening up job prospects. On the other hand, there are drawbacks including resource depletion, elevated crime rates, and environmental harm brought on by overpopulation.