MCQs Soil Science-53 Posted on June 27, 2025August 30, 2025Author agropublishers 0 1. Aluminum toxicity is a major concern in ______________ soils Sodic Acidic Neutral Alkaline 2. Micronutrients are required in small amounts and normally constitute __________ of a plant’s dry weight Less than 500 mg kg –1 (0.05%) None of these More than 10,000 mg kg –1 (1.0%) 1000 mg kg –1 (0.1%) or more 3. Volatilization loss of nitrogen (N) is relatively higher in _______ soils Sandy soils Acidic soils Alkaline soils Clayey soils 4. __________ is commonly used to determine potassium content in soil and plant samples. Flame photometer pH meter EC meter Spectrophotometer 5. What type of soil particle is known for its poor water infiltration and drainage? Silt Sand Loam Clay 6. Siderophores, produced by soil biota, are primarily _______________ Iron transporting and chelating compounds Plant growth regulators Broad-spectrum antibiotics High molecular weight compounds 7. What is the primary gaseous product lost from soil due to the volatilization of nitrogenous fertilizers? Nitrogen dioxide (NO₂) Nitric oxide (NO) Nitrogen gas (N₂) Ammonia gas (NH₃) 8. NDVI is an abbreviation of __________ Normalized Difference Vegetation Index None of these Nutrient Deficiency Verification Instrument Nitrogen Density Vegetation Indicator 9. Availability of __________ increased in alkaline soils Copper Iron Molybdenum Zinc 10. _________ is commonly used for collecting soil samples from the field Soil auger Soil gauge Penetrometer Soil moisture meter Loading … Question 1 of 10
