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