ICAR AIEEA-PG — Physical Science group (sub-subject 3.6 Environmental Science) · India · National Testing Agency for ICAR
Original practice questions written to the published syllabus · not past papersThe whole farm as a system: crop-livestock-fish-tree integration, rainfed and smallholder systems, sustainable intensification and how farm sustainability is measured. Builds on the agriculture library subject Farming Systems & Sustainable Agriculture and goes into assessment.
In the exams: ICAR AIEEA-PG Agronomy and Physical Science groups; ICAR AICE Agronomy (farming systems)
ICAR AIEEA-PG Physical Science group (Environmental Science 3.6) and agronomy-related papers
Cropping system definitions and indices (cropping intensity, land use efficiency, rice equivalent yield, production efficiency), integrated farming system components, dryland classifications and moisture conservation, nutrient use efficiency indices and energy budgeting terms.
How our questions for ICAR AIEEA-PG spread across the units of Sustainable & Integrated Farming Systems. Difficulty: 12 easy, 11 medium, 5 hard.
| Cropping systems: rotations, intercropping, relay cropping | 9 | |
| Rainfed and dryland farming systems | 4 | |
| Resource-use efficiency and input-output analysis | 4 | |
| Natural farming and low-input systems: evidence review | 4 | |
| Integrated crop-livestock-fish systems | 3 | |
| Energy budgeting of farming systems | 3 | |
| Systems thinking applied to farms | 1 |
Choose an answer, then open the working. Each explanation says why the right answer is right and why the others are not.
The ICAR institute that leads farming systems research in India is located at:
D. Modipuram
The ICAR-Indian Institute of Farming Systems Research is at Modipuram, Meerut. CRIDA (dryland agriculture) is at Hyderabad.
A farm has a net sown area of 120 ha and a gross cropped area of 180 ha. Its cropping intensity is:
A. 150 percent
Cropping intensity = gross cropped area / net sown area x 100 = 180/120 x 100 = 150 percent. 67 percent inverts the ratio; 300 adds the areas; 60 is their difference.
Rice (120 days) and wheat (140 days) occupy a field in one year. Land use efficiency is about:
C. 71 percent
Land use efficiency = (120 + 140)/365 x 100 = 71 percent. 260 is the total crop-days; 29 percent is the idle share of the year.
Rice yields 5 t/ha and wheat 4 t/ha in a rice-wheat system. Rice sells at 20 per kg and wheat at 22 per kg. The rice equivalent yield of the system is:
D. 9.4 t/ha
REY = 5 + 4 x 22/20 = 5 + 4.4 = 9.4 t/ha. 9.0 adds raw yields; 8.6 uses 20/22 instead of 22/20; 10.4 doubles the price adjustment.
A system produces 9,000 kg/ha of grain from crops occupying the field for 260 days. Production efficiency is about:
A. 34.6 kg/ha/day
Production efficiency = 9,000/260 = 34.6 kg/ha/day. 24.7 divides by 365 instead of crop-days; 2.9 is a decimal slip.
Growing a second crop from the regrowth of the stubble of the first, as in sugarcane, is called:
B. Ratoon cropping
Ratoon crops regrow from stubble after harvest.
The main principle of an integrated farming system is that:
C. By-products of one enterprise become inputs for another
Integration links enterprises through by-product flows such as manure, residues and pond silt.
Which Indian research institute specialises in dryland agriculture?
D. CRIDA, Hyderabad
The Central Research Institute for Dryland Agriculture is at Hyderabad. CSSRI deals with salinity; NDRI with dairying.
Which practice is an example of in-situ moisture conservation?
C. Ridges and furrows or bunds that hold rain where it falls
In-situ methods keep rain on the field; wells and reservoirs are ex-situ supplies.
With 120 kg N/ha, yield is 4,500 kg/ha; without N it is 2,700 kg/ha. Agronomic efficiency of N is:
A. 15 kg grain per kg N
AE = (4,500 - 2,700)/120 = 15. 37.5 is PFP; 22.5 divides the unfertilised yield by N; 1,800 is the yield gain itself.
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