India · Agricultural Scientists Recruitment Board (ICAR) · civil-service · unverified source
NET: objective discipline paper for lectureship eligibility in agricultural universities. ARS: preliminary, mains descriptive paper and interview for Scientist posts in ICAR institutes. Format varies by notification.
Environmental Science and Agricultural Meteorology have been listed ASRB disciplines; whether a given cycle includes them and the exact pattern must be checked in each notification. Built from general knowledge.
Official source: https://www.asrb.org.in/
Original questions written to this exam's published syllabus and pattern. Not past papers.
1. Which amendment is used to reclaim sodic (alkali) soils with high exchangeable sodium?
D. Gypsum, followed by leaching
Gypsum supplies calcium to replace exchangeable sodium, which is then leached. Lime corrects acidity; salt and urea worsen or do not treat sodicity.
Principles of Environmental Science · Land degradation and wastelands: extent and reclamation
2. Why do flooded rice paddies emit methane?
D. Methanogens act once other acceptors are used up
Prolonged anaerobic conditions follow the redox ladder to methanogenesis; drainage interrupts it.
Environmental Chemistry · Redox reactions, pe-pH diagrams and redox zonation
3. Which biofertiliser is especially used for sugarcane?
B. Gluconacetobacter diazotrophicus
G. diazotrophicus is an endophytic nitrogen fixer in sugarcane; Rhizobium nodulates legumes; Azolla is for rice; Frankia for some trees.
Environmental Microbiology · Plant-microbe and soil-microbe interactions
4. What are R.A. Fisher's three basic principles of experimental design?
A. Replication, randomisation and local control
Fisher's three principles are replication (to estimate error), randomisation (to make error estimates valid) and local control or blocking (to reduce error). Precision, accuracy and recovery are analytical-chemistry quality terms.
Mathematics & Statistics for Environmental Science · Experimental designs: CRD, RBD, Latin square, split plot
5. Peter Singer's Animal Liberation (1975) is a foundational text of which view?
C. Sentientism
Singer extended moral consideration to beings capable of suffering, with implications for livestock farming.
Sustainability Science: Concepts, History & Ethics · Environmental ethics: anthropocentric, biocentric, ecocentric
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