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