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