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. Flame photometer EC meter pH meter Spectrophotometer 3. Availability of __________ increased in alkaline soils Molybdenum Zinc Iron Copper 4. What type of soil particle is known for its poor water infiltration and drainage? Loam Clay Silt Sand 5. Aluminum toxicity is a major concern in ______________ soils Neutral Alkaline Acidic Sodic 6. Volatilization loss of nitrogen (N) is relatively higher in _______ soils Acidic soils Alkaline soils Clayey soils Sandy soils 7. 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) 8. _________ is commonly used for collecting soil samples from the field Soil moisture meter Soil gauge Penetrometer Soil auger 9. NDVI is an abbreviation of __________ Normalized Difference Vegetation Index Nutrient Deficiency Verification Instrument None of these Nitrogen Density Vegetation Indicator 10. Micronutrients are required in small amounts and normally constitute __________ of a plant’s dry weight More than 10,000 mg kg –1 (1.0%) Less than 500 mg kg –1 (0.05%) 1000 mg kg –1 (0.1%) or more None of these Loading … Question 1 of 10
