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