National Postgraduate Entrance Exam (考研) — 0907 Forestry

China · Ministry of Education / CHSI and admitting universities · pg · unverified source

160practice questions written to this syllabus
13subjects

Format

Politics 100 + foreign language 100 + two specialised papers of 150 (general kaoyan structure, verified for Laisha's Agribusiness track). Forestry programmes use either the national agricultural unified papers or university-set papers.

Sections

Over the years

Unverified for forestry: which unified paper each forestry school uses was not checked. 0907 林学 is a first-level discipline; forestry engineering is a separate discipline.

Official source: https://yz.chsi.com.cn/

Subjects this exam draws on

Forest Botany & Plant Systematics8 questionsDendrology & Tree Identification10 questionsTree Physiology26 questionsForest Soils & Soil Conservation10 questionsForest Meteorology & Climatology17 questionsBiometry, Statistics & Computing for Forestry23 questionsForest Tree Seed Technology7 questionsVegetative Propagation & Forest Biotechnology30 questionsForest Nursery & Plantation Establishment6 questionsSilvicultural Systems2 questionsStand Tending, Thinning & Pruning4 questionsSilviculture of Important Tree Species14 questionsForest Inventory & Sampling Design3 questions

Five practice questions, worked

Original questions written to this exam's published syllabus and pattern. Not past papers.

1. Lignin in the secondary wall makes it:

  1. Soft and elastic
  2. Water-soluble
  3. Photosynthetic
  4. Rigid and decay-resistant
Answer and working

D. Rigid and decay-resistant

Lignin stiffens and protects walls; wood is mostly lignified secondary walls.

Forest Botany & Plant Systematics · Plant cell, tissues and secondary growth

2. Bengal kino, a red exudate, comes from:

  1. Acacia senegal
  2. Pinus roxburghii
  3. Ficus religiosa
  4. Butea monosperma
Answer and working

D. Butea monosperma

Butea yields Bengal kino; Acacia senegal gum arabic; chir pine resin; Ficus latex.

Dendrology & Tree Identification · Field characters: bark, blaze, leaf arrangement, stipules, exudates

3. A leaf cell has solute potential −1.2 MPa and pressure potential +0.5 MPa. Ignoring gravity and matric effects, what is its water potential?

  1. −1.7 MPa
  2. +0.7 MPa
  3. −0.7 MPa
  4. −0.6 MPa
Answer and working

C. −0.7 MPa

Ψ = Ψs + Ψp = −1.2 + 0.5 = −0.7 MPa. −1.7 subtracts the turgor; +0.7 reverses the sign.

Tree Physiology · Water relations: transpiration, cohesion-tension, xylem embolism

4. Why do forest soils that have never been ploughed commonly show sharper horizon boundaries than nearby farmed soils?

  1. Forest trees deposit a different mineral in each horizon
  2. Forest soils are always younger than farmed soils
  3. Ploughing mixes the upper horizons into a uniform layer
  4. Tree roots cement each horizon boundary with silica
Answer and working

C. Ploughing mixes the upper horizons into a uniform layer

Tillage homogenises the topsoil (forming an Ap horizon); unploughed forest soils keep O, A and E horizons distinct, although tree uprooting mixes soil locally.

Forest Soils & Soil Conservation · Soil-forming factors and processes under forest

5. A forest has net radiation 500 W m⁻², soil heat flux 20 W m⁻² and Bowen ratio 0.5. What is the latent heat flux?

  1. 320 W m⁻²
  2. 160 W m⁻²
  3. 240 W m⁻²
  4. 480 W m⁻²
Answer and working

A. 320 W m⁻²

H + LE = 500 − 20 = 480; β = H/LE = 0.5, so LE = 480/1.5 = 320 and H = 160. 240 splits the energy equally.

Forest Meteorology & Climatology · Atmosphere, radiation balance and energy budget

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