Chapter 1: Irrigation Management in Vegetable Crops
MCQ
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What is the main reason vegetable crops require frequent irrigation?
a) They grow slowly
b) They contain 80–90% water
c) They do not absorb minerals from the soil
d) They do not require water -
Which type of vegetable crops require frequent irrigation?
a) Root vegetables
b) Leafy vegetables
c) Fruiting vegetables
d) Tubers -
What is the key to water management in vegetable crop production?
a) Using underground water
b) A well-organized water management plan and irrigation scheduling
c) Depending only on rainfall
d) Using only artificial irrigation -
What is the major limitation of rainfall as a water source?
a) It is unlimited
b) It is unpredictable
c) It is always pure
d) It is artificial -
What is irrigation?
a) Natural application of water
b) Artificial application of water to maintain soil moisture
c) The process of removing excess water
d) A method of storing water underground -
Which factor affects the irrigation requirement of a vegetable crop?
a) Type of crop
b) Climate
c) Soil type
d) All of the above -
Which type of soil requires frequent but light irrigation?
a) Clayey soil
b) Sandy soil
c) Loamy soil
d) Silt soil -
Which irrigation system requires regular watering?
a) Sprinkler irrigation
b) Surface irrigation
c) Sub-surface irrigation
d) Drip irrigation -
Why is irrigation important for vegetable crops?
a) It increases the yield
b) It ensures good quality vegetables
c) It reduces dependence on rainfall
d) All of the above -
What is a disadvantage of using poor-quality water for irrigation?
a) Increases soil health
b) Reduces soil permeability
c) Increases mineral uptake
d) Prevents weed growth -
What is the normal pH range for irrigation water?
a) 4.0–5.0
b) 6.5–8.5
c) 8.5–10.0
d) 3.5–4.5 -
What does SAR (Sodium Adsorption Ratio) indicate?
a) The presence of toxic metals in water
b) The relative proportion of sodium, calcium, and magnesium in water
c) The electrical conductivity of water
d) The total amount of boron in water -
What happens when irrigation water has high sodium content?
a) Improves soil health
b) Strengthens soil aggregates
c) Seals soil pores and weakens soil binding capacity
d) Increases plant growth -
What is the maximum acceptable boron content in irrigation water?
a) 0.5 ppm
b) 1.0 ppm
c) 2.0 ppm
d) 3.5 ppm -
Which measure can be taken to manage poor water quality?
a) Adding gypsum in low-calcium soil
b) Increasing the use of chloride fertilizers
c) Using only sprinkler irrigation
d) Avoiding irrigation altogether -
What does EC (Electrical Conductivity) measure?
a) The color of water
b) The total dissolved salts in water
c) The percentage of soil fertility
d) The amount of oxygen in water -
What is the ideal EC value for good quality irrigation water?
a) Below 500 micromhos/cm
b) Below 1000 micromhos/cm
c) Below 1500 micromhos/cm
d) Below 2500 micromhos/cm -
Which of the following is not a source of surface water?
a) Rivers
b) Lakes
c) Tube wells
d) Dams -
How does mulching help in irrigation management?
a) Increases soil erosion
b) Increases the irrigation interval by conserving moisture
c) Prevents plants from absorbing water
d) Reduces the number of crops grown per year -
What is the effect of poor-quality water on soil?
a) Improves mineral absorption
b) Helps in soil conservation
c) Deteriorates soil health
d) Makes the soil more fertile -
What happens if irrigation water has high levels of sodium?
a) It strengthens soil aggregates
b) It increases the soil’s water-holding capacity
c) It reduces soil permeability
d) It improves root growth -
What should be avoided when using high-sodium irrigation water?
a) Sprinkler irrigation
b) Using fertilisers containing chloride and boron
c) Frequent deep irrigation
d) Both a and b -
What is the primary use of a pH meter in irrigation management?
a) Measuring water temperature
b) Measuring the pH level of water
c) Measuring the soil moisture content
d) Measuring soil salinity -
What is one advantage of irrigation scheduling?
a) Increases water wastage
b) Reduces weed problems
c) Increases dependence on rainfall
d) Decreases crop yield -
Why is the electrical conductivity of water reported at 25°C?
a) Because it is the average temperature of irrigation water
b) To ensure consistency in readings
c) To make the water more conductive
d) To increase the salinity of the water -
How can boron in irrigation water be managed?
a) Adding calcium to water
b) Diluting high-boron water
c) Using boron-rich fertilizers
d) Increasing the amount of irrigation water -
What is the main cause of groundwater depletion in India?
a) Excessive use of fertilizers
b) Overuse of irrigation and poor conservation practices
c) High rainfall
d) Low soil fertility -
Which of the following is not a suitable method to improve irrigation water quality?
a) Adding sulphur and lime
b) Leaching excessive salts
c) Increasing SAR level
d) Using gypsum in low-calcium soils -
Which irrigation method should be avoided when using poor-quality water?
a) Drip irrigation
b) Sprinkler irrigation
c) Surface irrigation
d) Subsurface irrigation -
Which vegetable crops generally require more water?
a) Leafy vegetables
b) Fruiting vegetables
c) Root vegetables
d) Tuber vegetables
Answers
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b
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b
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b
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b
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b
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d
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b
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d
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d
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b
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b
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b
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c
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b
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a
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b
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c
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c
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b
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c
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c
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d
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b
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b
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b
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b
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b
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c
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b
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a
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