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