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