ASRB NET and ARS — Forestry and Agroforestry disciplines · India · Agricultural Scientists Recruitment Board (ICAR)
Original practice questions written to the published syllabus · not past papersMaking agroforestry work: tree-crop interactions above and below ground, management of trees on farms, productivity, and the economics of agroforestry systems.
In the exams: ICAR AICE-JRF 59 Unit 6 and Unit 9 (economic evaluation of agroforestry, land equivalent ratio) and Unit 12 (carbon sequestration)
How our questions for ASRB NET and ARS spread across the units of Agroforestry Management, Interactions & Economics. Difficulty: 0 easy, 13 medium, 8 hard.
| Tree-crop interactions: complementarity, supplementarity, competition | 4 | |
| Nutrient cycling and soil improvement by trees | 3 | |
| Productivity and land equivalent ratio | 3 | |
| Economic evaluation: cost-benefit analysis of agroforestry | 3 | |
| Light, water and nutrient competition | 2 | |
| Carbon sequestration in agroforestry | 2 | |
| Adoption of agroforestry by farmers | 2 | |
| Allelopathy and its management | 1 | |
| Tree management on farms: pruning, pollarding, root pruning | 1 |
Choose an answer, then open the working. Each explanation says why the right answer is right and why the others are not.
On a production possibility curve for trees and crops, a downward-sloping section indicates:
C. Competition
More of one means less of the other.
Measuring crop yield at increasing distances from a tree row is called a:
C. Transect or line-source study
Yield gradients quantify interaction zones.
The Nelder fan design is used in agroforestry research mainly to study:
D. Effects of tree spacing in one plot
Systematic design varying density continuously.
Root pruning reduces competition with crops but must often be repeated because:
D. Roots regrow within a few years
Regrowth restores competition.
Carbon stored in short-rotation pulpwood from agroforestry is released relatively quickly because:
A. Paper and fuel are short-lived products
Plywood and furniture store carbon longer.
An NPV of 100,000 over 6 years at 10% corresponds to an equivalent annual value of about:
D. 22,960
EAV = 100,000 x 0.1 / (1 - 1.1^-6) = 22,960. 16,670 just divides by 6.
Statistical models commonly used to identify factors in adoption surveys are:
A. Logit and probit models
Binary choice models.
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