Forestry and Plant Sciences

Dalbergia (such as Dalbergia sissoo) is highly valued for its timber and is generally considered a premium wood rather than a bad firewood. However, in the context of specific biology curricula, it is often cited as poor fuel compared to others due to its high value as timber.

The products which are obtained from the forests include the wood, gum, resins, tannins, sealing wax, etc. The plywood is the sheet of the wood which is used for furniture and house construction. The sealing wax is obtained from the bugs which live on trees. The gum is obtained from the secretions of the trees. The kerosene is not a forest product which is obtained from the distillation of the fuel from the ground. 

Energy plantation means growing selected species  of  trees and shrubs which are  harvestable in a comparably  shorter time and are  specifically meant for fuel. The fuel wood may be used either directly in wood burning stoves and boilers or processed into methanol, ethanol and producer gas. These plantations help provide wood either for cooking in homes or for industrial use, so as to satisfy local  energy  needs in a decentralized manner.

Dalbergia latifolia is an economically important timber species native to low elevation tropical monsoon forests of eastern India. Some common names in English are blackwood, bombay blackwood. Wood from Dalbergia latifolia tree is used in premium furniture making and cabinetry, as veneer, as plywood, for outdoor furniture.

Dalbergia sissoo is a highly valued hardwood timber species, providing an additional income source in agroforestry systems, mostly in India and Pakistan. The establishment of D. sissoo plantations for wood production can be an attractive proposition in economic terms. Most plantations are managed primarily for timber, with fuelwood as a secondary product. For fuelwood production in short rotations, several other species may give higher financial returns.

Guayule is a desert plant indigenous to the southwest United States and northern Mexico. The species (Parthenium argentatum) is a new industrial crop and the only species other than Hevea (the Brazilian rubber tree, Hevea brasiliensis) that has been used for rubber production on a commercial scale. Guayule needs low inputs of water, nutrients and pesticides less than many other crops and can be grown under arid and semi-arid climatic conditions. Thus, the correct answer is option C.

Leucaena leucocephala (Subabul) is a quick-growing
the small leguminous plant included in social
forestation.

Sal (Shorea robusta) timber is known for being strong, durable, heavy, and taking a good polish.

(c).  Lakhs of trees are planted by people in the month of July every year. The occasion is called Van Mahotsav.

Substances which contain organic matter can undergo carbonization. Minerals do not contain any organic matter and cannot undergo carbonization.

Cutting is a technique where the vegetative parts which are meristematic in nature is used for propagation so it can easily grow into a new plant. The best time for the growth of cutting is summer because cuttings are very delicate and are prone to fungal growth. In summers the chances of fungal growth are rare as there is least humidity.

Decomposers are organisms that break down dead organic material. Earthworms, mushrooms (fungi), and many snails act as decomposers in forest ecosystems.

Producers are organisms that create their own energy, typically through photosynthesis. An oak tree is a plant and thus a producer, whereas ants, birds, and squirrels are consumers.

Through photosynthesis, trees capture carbon dioxide from the air and convert it into biomass (wood and leaves). While water is necessary, the majority of a tree's dry mass comes from the carbon pulled from the air.

Ecosystems are interconnected; if plants die due to drought, the herbivores that eat those plants will decrease, which in turn reduces the food supply for the carnivorous eagles.