Agricultural Meteorology - 1

By Skumar

 

Agricultural Meteorology-1

Meaning, Scope, Earth’s Atmosphere & Weather Variables


1. Agricultural meteorology deals with:

A. Soil science
B. Weather–crop relationship
C. Plant breeding
D. Entomology

✅ Ans: B
📌 Studies interaction of weather and agriculture

2. Main objective of agricultural meteorology is to:

A. Increase rainfall
B. Minimize weather risk
C. Control pests
D. Improve soil texture

✅ Ans: B

3. Which factor is NOT studied in agrometeorology?

A. Temperature
B. Rainfall
C. Soil pH
D. Wind

✅ Ans: C

4. The atmosphere is held to earth by:

A. Rotation
B. Gravity
C. Pressure
D. Radiation

✅ Ans: B

5. Major gas in atmosphere:

A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Hydrogen

✅ Ans: B

6. Oxygen percentage in atmosphere is about:

A. 11%
B. 15%
C. 21%
D. 30%

✅ Ans: C

7. CO₂ is important for:

A. Respiration
B. Transpiration
C. Photosynthesis
D. Germination

✅ Ans: C

8. Variable component of atmosphere:

A. Nitrogen
B. Oxygen
C. Water vapour
D. Argon

✅ Ans: C

9. Weather phenomena occur mainly in:

A. Stratosphere
B. Mesosphere
C. Troposphere
D. Thermosphere

✅ Ans: C

10. Height of troposphere is maximum at:

A. Poles
B. Equator
C. Tropics only
D. Temperate region

✅ Ans: B

11. Ozone layer is found in:

A. Troposphere
B. Stratosphere
C. Mesosphere
D. Thermosphere

✅ Ans: B

12. The layer protecting earth from UV rays:

A. Troposphere
B. Mesosphere
C. Stratosphere
D. Exosphere

✅ Ans: C

13. Atmospheric pressure decreases with:

A. Depth
B. Altitude
C. Latitude
D. Longitude

✅ Ans: B

14. Which is NOT a weather variable?

A. Rainfall
B. Wind
C. Soil texture
D. Temperature

✅ Ans: C

15. Instrument to measure rainfall:

A. Barometer
B. Anemometer
C. Rain gauge
D. Hygrometer

✅ Ans: C

16. Relative humidity is measured by:

A. Barometer
B. Thermometer
C. Hygrometer
D. Pyranometer

✅ Ans: C

17. Wind speed is measured by:

A. Wind vane
B. Anemometer
C. Hygrometer
D. Thermometer

✅ Ans: B

18. Wind direction is measured by:

A. Anemometer
B. Barometer
C. Wind vane
D. Pyranometer

✅ Ans: C

19. Solar radiation affects:

A. Photosynthesis
B. Evaporation
C. Transpiration
D. All of these

✅ Ans: D

20. Sunshine hours are measured by:

A. Pyranometer
B. Sunshine recorder
C. Hygrometer
D. Barometer

✅ Ans: B

21. Weather refers to:

A. Long-term condition
B. Short-term condition
C. Seasonal condition
D. Permanent condition

✅ Ans: B

22. Climate refers to:

A. Daily weather
B. Weekly weather
C. Long-term weather
D. Hourly weather

✅ Ans: C

23. Agrometeorology helps in:

A. Crop planning
B. Pest forecasting
C. Irrigation scheduling
D. All of these

✅ Ans: D

24. Which variable affects evapotranspiration most?

A. Pressure
B. Temperature
C. Rainfall
D. Soil pH

✅ Ans: B

25. High humidity favors:

A. Transpiration
B. Evaporation
C. Disease incidence
D. Root growth

✅ Ans: C

26. Wind increases:

A. Photosynthesis
B. Evaporation
C. Soil fertility
D. Rainfall

✅ Ans: B

27. Frost occurs due to:

A. High temperature
B. Low temperature
C. High rainfall
D. Strong wind

✅ Ans: B

28. Drought is related to:

A. Excess rainfall
B. Low rainfall
C. High humidity
D. Cloud cover

✅ Ans: B

29. Agromet advisory services help farmers by:

A. Giving fertilizers
B. Providing weather-based advice
C. Supplying seeds
D. Loan distribution

✅ Ans: B

30. The study of atmosphere is called:

A. Ecology
B. Meteorology
C. Agronomy
D. Climatology

✅ Ans: B

31. The lowest layer of the atmosphere is:

A. Stratosphere
B. Mesosphere
C. Troposphere
D. Thermosphere

✅ Ans: C
📌 All weather and crop-related processes occur here

32. Increase in altitude causes:

A. Increase in temperature
B. Increase in pressure
C. Decrease in temperature
D. Increase in rainfall

✅ Ans: C

33. Which atmospheric layer contains maximum water vapour?

A. Stratosphere
B. Mesosphere
C. Troposphere
D. Thermosphere

✅ Ans: C

34. The instrument used to measure atmospheric pressure is:

A. Thermometer
B. Barometer
C. Anemometer
D. Hygrometer

✅ Ans: B

35. Diurnal temperature range means:

A. Monthly temperature difference
B. Annual temperature difference
C. Day and night temperature difference
D. Seasonal temperature difference

✅ Ans: C

36. Which factor mainly controls rainfall?

A. Temperature
B. Pressure difference
C. Wind movement
D. All of these

✅ Ans: D

37. Relative humidity is highest during:

A. Noon
B. Afternoon
C. Early morning
D. Evening

✅ Ans: C

38. Excess rainfall leads to:

A. Soil aeration
B. Waterlogging
C. Increased yield
D. Drought

✅ Ans: B

39. Evaporation increases with:

A. High humidity
B. Low temperature
C. Strong wind
D. Cloud cover

✅ Ans: C

40. Solar radiation reaching earth is called:

A. Longwave radiation
B. Terrestrial radiation
C. Insolation
D. Back radiation

✅ Ans: C

41. Which weather element affects pollination most?

A. Rainfall
B. Wind
C. Temperature
D. Pressure

✅ Ans: B

42. Hailstorm mainly damages:

A. Roots
B. Leaves and fruits
C. Soil
D. Microorganisms

✅ Ans: B

43. Weather forecasting helps farmers in:

A. Crop selection
B. Irrigation scheduling
C. Pest management
D. All of these

✅ Ans: D

44. Climate normal period is:

A. 10 years
B. 20 years
C. 30 years
D. 50 years

✅ Ans: C
📌 As per WMO standard

45. High wind velocity may cause:

A. Lodging of crops
B. Increased soil fertility
C. Better pollination
D. Germination

✅ Ans: A

46. Which is a greenhouse gas?

A. Nitrogen
B. Oxygen
C. Carbon dioxide
D. Argon

✅ Ans: C

47. Cloud formation occurs due to:

A. Condensation
B. Evaporation
C. Transpiration
D. Radiation

✅ Ans: A

48. Weather variable influencing transpiration most:

A. Wind
B. Temperature
C. Humidity
D. All of these

✅ Ans: D

49. Rainfall measured in India is expressed in:

A. Inches
B. Centimeters
C. Millimeters
D. Meters

✅ Ans: C

50. Agricultural meteorology helps in reducing:

A. Yield
B. Input cost
C. Weather risk
D. Crop diversity

✅ Ans: C


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