Forestry Marathon — Full Revision + Important MCQs | UPCATET + MCAER 2026 | Agri Coaching Chandigarh

Summary

The session is a forestry revision class built around exam-style multiple-choice questions. The instructor describes forestry as a relatively compact, high-scoring subject and cautions candidates not to underestimate its exam weight. She estimates about 10 questions in UPCATET and roughly four to five in recent Maharashtra exams. The questions are described as similar to previous-year questions, with explanations of the underlying concepts.

1. Bamboo

• Bamboo is highlighted as a frequently tested topic, especially its scientific name, family, uses, and harvesting cycle.
• The lecture gives an optimum felling cycle of three to four years and advises against harvesting before two years.
• Dendrocalamus strictus is identified as solid or male bamboo. Its family is given as Poaceae.
• Bamboo is described as versatile, renewable, and environmentally friendly. Uses mentioned include handicrafts, furniture, bottles, stationery, fibre or “bamboo rayon,” edible shoots, and pulp or paper.
• For cutting, the lecture advises leaving a stump about 15 cm above ground and avoiding cuts that split the hollow culm. It also mentions 5 × 5 m spacing.

2. Agroforestry Systems and Terminology

The lecture offers a basic word-part approach to identifying agroforestry combinations:

• Agri-/agro- = agricultural or field crops
• Silvi-/silvo- = forest trees or multipurpose trees
• Pasture = grasses, grazing land, and often livestock
• Horti- = horticultural crops, especially fruit trees

Using these components:

• Agrisilviculture combines agricultural crops and trees.
• Silvopasture combines trees with pasture, grasses, and livestock.
• Agrihorticulture combines agricultural crops and fruit trees.
• Hortisilviculture combines horticultural crops and trees.
• Other combinations can include apiculture (bees) and pisciculture (fish) alongside crops, trees, or pasture.

The lecture also explains:

• Homestead agroforestry: Small-scale combinations of trees and other activities near the home, mainly to meet a household’s needs.
• Tongya cultivation: Crops are grown temporarily among young trees on forest land. Crop cultivation stops as trees grow and their shade becomes too heavy. The lecture says Dietrich Brandis introduced the system in India in 1890, that the term comes from Burmese, and that it is also called Kumari in South India.
• Alley cropping, also called hedgerow intercropping: Crops are planted in the spaces between rows of trees or shrubs. The lecture notes nitrogen-fixing trees, an east–west row orientation, and spacing guidelines as points to remember.
• Shelterbelts and windbreaks: These protect crops from strong winds. Shelterbelts are generally wider and contain multiple rows, while a windbreak may consist of a single row. The lecture says shelterbelts reduce wind speed and help moderate the local microclimate, limiting moisture loss through evaporation and transpiration.

3. Forest Legislation, Policy, and Categories

• The lecture distinguishes the first Indian Forest Act, drafted in 1865, from the later acts of 1878 and 1927.
• The Indian Forest Act of 1927 is presented as the principal act in force in the lecture’s account, replacing earlier legislation. The instructor links it to forest classification and restrictions on activities such as hunting and smuggling.
• Three forest categories are reviewed:
  • Reserved forest: The strictest controls; entry and use are highly restricted.
  • Protected forest: Restrictions apply, but the lecture describes them as less strict than those for reserved forests.
  • Village forest: Forest land entrusted to a village for local use, with an emphasis on sustainable management.
• The lecture lists the National Forest Policy of 1988 and gives a forest-cover target of 60% in its revision discussion.
• Other legislation and dates listed include the Wildlife Protection Act (1972), Prevention of Cruelty to Animals Act (1960), Environment Protection Act (1986), and Forest Conservation Rules (2022).

4. Forest Measurement and Forestry Branches

• DBH means diameter at breast height: the diameter of a tree trunk measured at a standard height.
• The lecture gives India’s standard as 1.37 m (about 4.5 feet), contrasting it with 1.30 m used in some other countries.
• A Christen’s hypsometer is identified as an instrument for estimating tree height using similar-triangle principles.
• Newton’s formula is presented as a method for estimating log volume using measurements at both ends and the middle.
• A Pressler’s increment borer is used to extract a core sample from a tree, including to examine age and growth.

Forestry branches covered include:

• Silviculture: Establishment, care, development, regeneration, and production of forest stands.
• Forest mensuration: Measurement of tree dimensions, volume, age, and increment.
• Forest utilization: Harvesting, conversion, processing, and use of forest products.
• Forest management: Applying scientific, technical, and economic principles to forests.
• Dendrology: Identification and systematic study or classification of trees.
• Silvics: The life history and general characteristics of forest trees.
• Agroforestry: Integrating trees with agriculture or other land uses.

5. Forest Types, Structure, and Silvicultural Terms

• A coppice is the regrowth of shoots from a tree or shrub after cutting; the related practice is called coppicing.
• A high forest is described as a forest regenerated from seed.
• A virgin forest is one that has grown naturally without significant human interference.
• A pure forest is described as having one tree species—roughly 80% or more of the stand—while a mixed forest contains multiple species without one necessarily dominating.
• Even-aged or regular forest refers to trees of similar age.
• Protective forests are discussed in terms of protection from natural hazards, particularly in hilly areas. Recreational forests are described as serving public recreation rather than timber production.
• The lecture gives these canopy-density ranges:
  • Very dense forest: 70–100%
  • Moderately dense forest: 40–70%
  • Open forest: 10–40%
  • Scrub: Less than 10%
• A map-colour question identifies cobalt blue with tropical moist deciduous forest.
• Girdling means cutting a complete ring through the bark and cambium around a standing tree. The lecture explains that this disrupts transport between roots and leaves and can kill the tree without felling it. Uses mentioned include thinning and removing invasive species while retaining habitat structure.
• The instructor distinguishes pollarding (cutting branches or foliage at a height to encourage regrowth) and lopping (removing young shoots or foliage, including for fodder) from girdling.

6. Species, Wood Uses, and Forestry Facts

The class reviews several species-based exam associations, including:

• Ailanthus excelsa: Match industry.
• Tectona grandis (teak): Wood uses and the compound tectol.
• Shorea robusta (sal): Scientific name and railway-sleeper use.
• Salix alba: Suitable for cricket bats.
• Butea monosperma: “Flame of the forest.”
• Acacia nilotica: Indian gum Arabic tree.
• Leucaena leucocephala (subabul): Mimosine and use in protein banks; also called a “miracle tree” in a later MCQ.
• Ginkgo biloba: “Living fossil” tree.
• Diospyros melanoxylon: Associated with bidi leaves.

The lecture also reviews wood uses for aircraft, agricultural implements, railway sleepers, boats, musical instruments, pencils, sports goods, fishing rods, and plywood. The instructor recommends memorising these associations through repeated review of tables and charts.

7. Mangroves and Environmental Concepts

• Mangroves are associated with estuaries, where rivers and seawater meet, and with coastal areas.
• They are described as salt-tolerant halophytes.
• Vivipary is explained as seed germination while the seed remains attached to the parent tree; Rhizophora is mentioned as an example.
• Pneumatophores, or aerial roots, project above waterlogged soil to help meet the plant’s oxygen needs. Prop or stilt roots provide support.
• Several mangrove species and families are listed in the lecture, including Rhizophora, Avicennia, Laguncularia, Sonneratia, and Nypa.
• Shifting cultivation is explained as clearing and burning vegetation, cultivating a plot for a period, then moving when fertility declines. According to the lecture, the fallow period has shortened as population pressure has increased.
• Local names reviewed include Jhum in the Northeast and Podu in Andhra Pradesh and Odisha; slash-and-burn is given as a general synonym.

Environmental terms are distinguished as follows:

• Bioremediation: The broad use of living organisms to remove or reduce pollutants.
• Biostimulation: Adding nutrients or oxygen to stimulate native microbes.
• Bioaugmentation: Introducing cultured microorganisms to accelerate pollutant breakdown.
• Biotransformation: Converting a contaminant into a less harmful form.
• Biodrainage: Using trees, such as eucalyptus, to remove excess water through transpiration.
• Phytoremediation: Using plants to absorb, stabilise, degrade, or release contaminants. The lecture also defines phytoextraction, phytostabilisation, phytodegradation, and phytovolatilisation.

8. Social and Extension Forestry, Institutions, and Dates

• Social forestry is presented as tree planting and forest development involving local communities and public participation, including on village or wasteland areas.
• Extension forestry is described as expanding tree cover by planting trees in new, non-traditional areas.
• The lecture identifies J. C. Westoby with coining the term “social forestry,” Dietrich Brandis as the father of forestry, and P. K. Ramachandran Nair as the father of agroforestry.

Institutions and locations reviewed include:

• Forest Research Institute: Dehradun
• Indian Grassland and Fodder Research Institute: Jhansi
• Central Arid Zone Research Institute: Jodhpur

• Indian Institute of Forest Management: Bhopal

• Madhya Pradesh is given as the Indian state with the largest forest-cover area. For wasteland area, the lecture distinguishes Rajasthan when asking for a state from Jammu and Kashmir when states and Union Territories are considered together.

• Dates noted:
  • World Wildlife Day: 3 March
  • World Forestry Day: 21 March
  • World Environment Day: 5 June
  • World Bamboo Day: 18 September

Speakers and Sources Featured

• Janvi Vajpayee: The session’s instructor and primary speaker.
• Deepak Sir: Mentioned as having previously covered Agronomy MCQs; he is not a speaker in this session.
• Agri Coaching Chandigarh: The channel hosting the class. No other identifiable speaker is featured in the subtitles.