ICAR AIEEA-PG — Forestry/Agroforestry & Silviculture (Major Subject Group 09) · India · National Testing Agency for ICAR
Original practice questions written to the published syllabus · not past papersWeather and climate as they shape forest distribution, growth and hazards: radiation, temperature, moisture and wind, inside and above the canopy.
In the exams: Background to IFoS silviculture (site factors) and fire topics; ICAR AICE-JRF 59 Unit 2 (climatic site factors) and Unit 12
How our questions for ICAR AIEEA-PG spread across the units of Forest Meteorology & Climatology. Difficulty: 17 easy, 37 medium, 3 hard.
| Precipitation, interception and fog drip | 8 | |
| Humidity and evapotranspiration | 8 | |
| Temperature, frost and heat regimes | 7 | |
| Wind and windthrow | 7 | |
| Forest microclimate and edge effects | 7 | |
| Climate classification (Köppen, Holdridge life zones) | 6 | |
| Weather instruments and forest weather stations | 6 | |
| Atmosphere, radiation balance and energy budget | 5 | |
| Fire weather and fire danger indices | 3 |
Choose an answer, then open the working. Each explanation says why the right answer is right and why the others are not.
A well-watered tropical forest has a low Bowen ratio. This means:
A. Evapotranspiration uses most energy
β = H/LE; a low value (about 0.2–0.5) means latent heat dominates.
Further reading: See the manual sources: Oke; Monteith and Unsworth; Bonan; FAO-56; WMO-No. 8; Van Wagner 1987; Holdridge 1967
Worldwide, alpine and polar treelines occur where the mean growing-season temperature falls to roughly:
A. 6–7 °C
Körner and colleagues found treelines at a growing-season mean of about 6–7 °C; the 10 °C warmest-month isotherm is an older approximation.
Further reading: See the manual sources: Oke; Monteith and Unsworth; Bonan; FAO-56; WMO-No. 8; Van Wagner 1987; Holdridge 1967
A catchment receives 1200 mm of rain in a year and yields 450 mm of streamflow, with negligible storage change. What is annual evapotranspiration?
C. 750 mm
ET = P − Q − ΔS = 1200 − 450 = 750 mm.
Further reading: See the manual sources: Oke; Monteith and Unsworth; Bonan; FAO-56; WMO-No. 8; Van Wagner 1987; Holdridge 1967
Which method directly measures evapotranspiration above a forest canopy from turbulent fluctuations?
D. Eddy covariance on a flux tower
Eddy covariance correlates vertical wind and vapour fluctuations; the other methods estimate or measure other quantities.
Further reading: See the manual sources: Oke; Monteith and Unsworth; Bonan; FAO-56; WMO-No. 8; Van Wagner 1987; Holdridge 1967
By WMO convention, surface wind speed is measured at what height above open ground?
A. 10 m
10 m is standard for wind; 1.25–2 m is the height of temperature and humidity sensors.
Further reading: See the manual sources: Oke; Monteith and Unsworth; Bonan; FAO-56; WMO-No. 8; Van Wagner 1987; Holdridge 1967
In a mid-latitude northern hemisphere forest, the brightest part of a small canopy gap at ground level is usually:
A. Displaced towards the north side
Sunlight enters at an angle from the south, so the sunlit patch falls towards the gap's northern edge.
Further reading: See the manual sources: Oke; Monteith and Unsworth; Bonan; FAO-56; WMO-No. 8; Van Wagner 1987; Holdridge 1967
In a Walter–Lieth climate diagram, an arid period is shown where:
A. Rain line dips below temperature line
With 10 °C = 20 mm, precipitation below the temperature line indicates water deficit.
Further reading: See the manual sources: Oke; Monteith and Unsworth; Bonan; FAO-56; WMO-No. 8; Van Wagner 1987; Holdridge 1967
Which climate pattern is associated with severe fire seasons in Indonesia and Australia?
B. El Niño
El Niño brings drought to the Maritime Continent and eastern Australia.
Further reading: See the manual sources: Oke; Monteith and Unsworth; Bonan; FAO-56; WMO-No. 8; Van Wagner 1987; Holdridge 1967
A minimum thermometer uses alcohol with an index, while a maximum thermometer uses:
C. Mercury with a constriction
The constriction stops mercury returning to the bulb, holding the highest reading.
Further reading: See the manual sources: Oke; Monteith and Unsworth; Bonan; FAO-56; WMO-No. 8; Van Wagner 1987; Holdridge 1967
Which instrument measures photosynthetically active radiation for forest light studies?
A. Quantum sensor
Quantum sensors measure photon flux in the 400–700 nm band; pyrheliometers measure direct beam irradiance.
Further reading: See the manual sources: Oke; Monteith and Unsworth; Bonan; FAO-56; WMO-No. 8; Van Wagner 1987; Holdridge 1967
Ten here, 57 in the app. The Laisha app has every practice question we have written to ICAR AIEEA-PG in this subject, marked as you go, with timed papers, a jump-to-unanswered list and a certificate when you pass at 70 per cent.
Free for ten days, then one subscription of US$10 a month. We would rather say so here than have you find it later.
An AI operating system for agriculture: free guides, manuals and tools written for every country.