MCQs Agronomy-47 Posted on December 7, 2024August 30, 2025Author agropublishers 0 1. Which of the following best describes effective rainfall? Total rainfall in an area Rainfall that exceeds the infiltration capacity of the soil and runs off Rainfall that is absorbed by the soil and contributes to plant growth Rainfall that evaporates before reaching the ground and does not contribute to soil moisture 2. ——— can significantly increase the Cation Exchange Capacity of soil Addition of sand Addition of organic matter Minor change in soil pH Excessive tillage operation 3. How does microclimate differ from macroclimate? Microclimate is the climate of a large region, while macroclimate is the climate of a small area Microclimate is the climate of a mountain, while macroclimate is the climate of a valley Microclimate is the climate of a small area, while macroclimate is the climate of a large region Microclimate is the climate of a city, while macroclimate is the climate of a rural area 4. The primary mechanism by which soil particles attract cations is ———– Hydrogen bonding Covalent bonding Van der Waals forces Electrostatic force 5. ——- ———— ——–constitute over 90% of a plant’s dry weight Nitrogen, phosphorus, potassium Nitrogen, sulfur, calcium Carbon, hydrogen, oxygen Magnesium, phosphorus, potassium 6. Base temperature for rice growth is ———— °C 10 °C 12 °C 5 °C 7 °C 7. ———— of the following is NOT a factor that primarily influences CEC Soil pH Soil temperature Soil organic matter content Soil texture 8. Measurement of ——- is the primary function of a tensiometer Rainfall intensity Soil moisture levels Atmospheric pressure Soil temperature 9. A hygrometer is primarily used to measure ——– Atmospheric pressure Atmospheric temperature Relative humidity Wind speed 10. Field Capacity is the ———– Minimum water content needed for plant survival Amount of water lost through evaporation Total amount of water in the soil before saturation Maximum amount of water a soil can hold after saturation and drainage Loading …
