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