MCQs Soil Science-46 Posted on May 5, 2025August 30, 2025Author agropublishers 0 1. Which soil pH range is more suitable for nitrification? <3.0 8.5–10.0 6.5–8.0 3.0–5.0 2. The mass of ONE mole of K2HPO4 is approximately ________ grams 348.2 136.1 174.17 89 3. _________ is vital for nitrogen fixation in soil Streptococcus Lactobacillus E. coli Rhizobium 4. Sulfur mineralization is the process by which microorganisms break down organic sulfur compounds in the soil, releasing _________ Sulfate ions (SO₄²⁻) H₂S Elemental S SO₂ 5. Which process competes with mineralization for nitrogen? Volatilization Nitrification Immobilization Denitrification 6. ___________ element is not released through mineralization Aluminum (Al) Phosphorus (P) Nitrogen (N) Carbon (C) 7. The conversion of organic nitrogen to inorganic nitrogen (ammonia) is called_________ Mineralization Nitrification Immobilization Ammonification 8. Which of the following is the primary indicator of soil health? Soil temperature Soil organic carbon Soil color Soil texture 9. The “Global Soil Partnership” (GSP) was launched by _________________ USAID UNDP World Bank FAO 10. Ammonification is the process by which microorganisms break down organic matter and can release _________ as an end product NO₃⁻ N₂ NH₄⁺ N₂O Loading … Question 1 of 10
