Scientific Officer -Agronomy-Practice-6

Practice questions

1. The process by which exposure to low temperature promotes flowering in certain plants is called:
   • Stratification
   • Vernalization
   • Scarification
   • Etiolation
2. A crop that produces a second harvest from the regrowth of stubble after the first harvest is known as:
   • A catch crop
   • A cover crop
   • A ratoon crop
   • A trap crop
3. In rice cultivation, puddling is mainly used to:
   • Increase deep percolation
   • Reduce soil permeability and water loss
   • Increase soil aeration during flooding
   • Eliminate the need for land levelling
4. The term “etiolation” refers to plant growth under:
   • Excessively high soil salinity
   • Complete nutrient sufficiency
   • Prolonged waterlogging
   • Insufficient light
5. The upward bending or rolling of leaf margins in some crops during water stress is commonly associated with:
   • Reduced plant water status
   • Excessive seed viability
   • Increased soil organic matter
   • Improved root aeration
6. Which plant structure is primarily responsible for absorbing water and dissolved mineral nutrients from the soil?
   • Flower petals
   • Root hairs
   • Pollen grains
   • Fruit walls
7. Which of the following is a common fungal disease of wheat?
   • Citrus canker
   • Bacterial blight of rice
   • Wheat rust
   • Cotton leaf curl disease
8. The primary purpose of seed treatment with an appropriate fungicide before sowing is to:
   • Increase the genetic purity of a variety
   • Change the crop's maturity group
   • Guarantee resistance to every disease
   • Protect seeds and seedlings against certain seed-borne or soil-borne pathogens
9. In crop production, “bolting” generally means:
   • Premature elongation of the flowering stem
   • Formation of root nodules
   • Development of underground storage roots
   • Complete prevention of flowering
10. Which factor most directly determines whether a crop variety is genetically suitable for a particular production environment?
    • The colour of the seed bag
    • The brand of harvesting equipment
    • Its adaptation to local climate, soil, and growing-season conditions
    • The distance between the farm and the market alone
11. In crop production, mulching means:
    • Removing all crop residues from the field
    • Covering the soil surface with suitable material
    • Flooding the field continuously
    • Cutting all plant roots before sowing
12. Which statement best describes crop water-use efficiency?
    • The total number of seeds stored after harvest
    • The percentage of weeds removed by hand
    • The depth of soil disturbed by a plough
    • The amount of crop production obtained per unit of water used, under a defined measure
13. In plant nutrition, interveinal chlorosis is a symptom in which:
    • Tissue between leaf veins becomes yellow while veins remain greener
    • The entire root system turns into seed
    • Flowers develop without any leaves
    • All leaf veins become thicker than stems
14. A crop grown primarily to be incorporated into the soil to improve organic matter or supply nutrients is called:
    • A trap crop
    • A cash crop
    • A green-manure crop
    • A border crop
15. The main function of a combine harvester is to:
    • Apply fertilizer and irrigate simultaneously
    • Combine harvesting, threshing, and usually cleaning operations
    • Measure soil pH and electrical conductivity
    • Produce certified seed by genetic testing
16. Which condition most commonly favours the development of many fungal plant diseases?
    • Appropriate host, pathogen, and favourable environmental conditions occurring together
    • Absence of a susceptible host in every field
    • Complete absence of the disease-causing organism
    • Removal of every source of inoculum
17. Which practice is most directly associated with reducing wind erosion on exposed agricultural land?
    • Leaving the soil bare for long periods
    • Increasing unnecessary tillage passes
    • Removing all crop residues
    • Maintaining protective vegetation or crop-residue cover
18. Which measurement is commonly used to assess seedling emergence and early establishment potential in a seed lot beyond simple viability alone?
    • Soil colour
    • Field boundary length
    • Seed vigour
    • Grain market price
19. What is a major agronomic purpose of proper land levelling in irrigated fields?
    • To make every soil particle the same size
    • To promote more uniform water distribution across the field
    • To remove the crop's need for nutrients
    • To guarantee that no weeds can germinate
20. Which statement about integrated crop management is most accurate?
    • It combines appropriate agronomic practices to improve productivity and resource use
    • It requires using the same pesticide on every crop
    • It eliminates the need to monitor crops
    • It depends exclusively on increasing fertilizer rates