Quiz on Soil ScienceQuiz – 3 - January 4, 2021 | January 4, 2021 - AgriScan 1 minute read QUIZ STARTResults #1. Which of the following is called Agricultural lime? Ca(OH)2 CaO CaSiO3 CaCO3 #2. Which is the CCE of basic slag? 179 86 136 109 #3. Shape of Halloysite is ______? Floppy Tubular Needle shaped Plate shaped #4. Basal spacing of illite is _______? 14 A 10.1 A 20 A 7.2 A #5. Which one of the following is not an example of metamorphic rock? Marble Gneiss Granite Calcite #6. Basic rocks contains ________ % of silica? 55 - 65 40 - 55 20 - 30 65 - 70 #7. What is the % of Fe in Earth’s crust? 8.67 27.2 49.39 4.71 #8. Which one of the following is te source of both CA & MG? Apatite Olivine Dolomite Gypsum #9. Soil order that is characterized by peat, bog, Organic soil (>20 % organic matter) is called ______? Gelisols Oxisols Histosols Entisols #10. Newer alluvium is also termed as _______? Bhangar None Khaddar #11. Honeycomb like structure found in which soil? Black Alluvium Lateritic Red #12. Which of the microorganisms is highest in soil in terms of biomass? Virus Bacteria Actinomycetes Fungi #13. Rhizobium is nutritionally _______? Heterotrophic aerobic Heterotrophic anaerobic Autotrophic anaerobic Autotrophic aerobic #14. Which is not true for humus? CEC = 200 - 400 meq/100g N = 5% C:N = 10:1 C = 15% #15. Soil is considered as organic soil when it contains at least ______% of organic manner? 20 10 50 5 #16. Which of the following does take longest time to decompose? lignin Cellulose protein Sugar #17. The fraction of humus having higher molecular weight and insoluble in both acid and alkali is called ______? Fuluic acid Humic acid Humin Hymatomelanic acid #18. The C content in organic matter is ________? 58% 0.78% 1.724% 20% #19. Which is essential for Ammonia volatilization? Submergence High temperature Alkaline medium ASB Previous Finish
