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