Agronomy MCQs – Set 08 (Irrigation & Water Management)
Agronomy MCQs – Set 08 (Irrigation & Water Management)
Q1. Irrigation is defined as:
A) Natural supply of water to crops
B) Artificial application of water to crops
C) Rainfall during crop growth
D) Drainage of excess water
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Correct Answer: Artificial application of water to crops
Q2. The main objective of irrigation is to:
A) Increase soil erosion
B) Meet crop water requirement
C) Reduce soil fertility
D) Increase salinity
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Correct Answer: Meet crop water requirement
Q3. Which stage of crop growth is most sensitive to water stress?
A) Germination stage
B) Vegetative stage
C) Flowering stage
D) Maturity stage
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Correct Answer: Flowering stage
Q4. Consumptive use of water refers to:
A) Total rainfall received
B) Water used for evapotranspiration
C) Water stored in soil
D) Water lost through runoff
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Correct Answer: Water used for evapotranspiration
Q5. Field capacity is the:
A) Maximum water soil can hold after drainage
B) Minimum soil moisture content
C) Water at permanent wilting point
D) Saturation point of soil
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Correct Answer: Maximum water soil can hold after drainage
Q6. Permanent wilting point indicates:
A) Excess soil moisture
B) Point at which plants permanently wilt
C) Saturated soil condition
D) Optimum moisture level
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Correct Answer: Point at which plants permanently wilt
Q7. Available water for plants lies between:
A) Saturation and field capacity
B) Field capacity and permanent wilting point
C) Saturation and wilting point
D) Hygroscopic coefficient and saturation
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Correct Answer: Field capacity and permanent wilting point
Q8. Which irrigation method is most efficient in water use?
A) Flood irrigation
B) Furrow irrigation
C) Sprinkler irrigation
D) Drip irrigation
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Correct Answer: Drip irrigation
Q9. Flood irrigation is also known as:
A) Check basin irrigation
B) Surface irrigation
C) Drip irrigation
D) Sprinkler irrigation
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Correct Answer: Surface irrigation
Q10. Sprinkler irrigation is most suitable for:
A) Clay soils only
B) Undulating lands
C) Paddy fields
D) Heavy soils with low infiltration
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Correct Answer: Undulating lands
Q11. Drip irrigation supplies water directly to:
A) Entire field surface
B) Root zone of plants
C) Leaves of plants
D) Soil surface only
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Correct Answer: Root zone of plants
Q12. Irrigation water requirement depends mainly on:
A) Crop, soil and climate
B) Market demand
C) Fertilizer dose
D) Labour availability
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Correct Answer: Crop, soil and climate
Q13. Excess irrigation leads to:
A) Improved aeration
B) Nutrient leaching
C) Better root growth
D) Reduced salinity
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Correct Answer: Nutrient leaching
Q14. Which crop requires standing water?
A) Wheat
B) Maize
C) Rice
D) Mustard
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Correct Answer: Rice
Q15. Critical stages of irrigation are those stages:
A) When crop growth is slow
B) When water stress causes maximum yield reduction
C) At harvest stage
D) During dormancy
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Correct Answer: When water stress causes maximum yield reduction
Q16. Which irrigation scheduling method is based on soil moisture?
A) IW/CPE ratio
B) Fixed interval method
C) Soil moisture depletion method
D) Calendar method
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Correct Answer: Soil moisture depletion method
Q17. IW/CPE ratio method is based on:
A) Soil texture
B) Pan evaporation
C) Rainfall intensity
D) Crop variety
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Correct Answer: Pan evaporation
Q18. Which soil requires frequent irrigation?
A) Clay soil
B) Loam soil
C) Sandy soil
D) Silty clay loam
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Correct Answer: Sandy soil
Q19. Water use efficiency is defined as:
A) Yield per unit land
B) Yield per unit water used
C) Water applied per hectare
D) Total irrigation water applied
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Correct Answer: Yield per unit water used
Q20. Proper water management aims to:
A) Apply maximum irrigation
B) Save water and increase yield
C) Reduce crop duration
D) Increase salinity
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Correct Answer: Save water and increase yield
