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