SIMULATED EXAMINATION IN SOIL SCIENCE | EXAM PAPER WITH 100% CORRECT ANSWERS

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General Directions 1. Select the correct answer for each of the following questions 2. Encircle the letter of the correct answer 3. Encircling two or more letters will invalidate your answer ... 4. Avoid erasures 5. Any form of cheating is strictly prohibited Multiple Choice 1. Nitrification carried out by autotrophic bacteria is not affected by which of the following? a. pH b. Temperature c. Oxygen supply d. Redox potential e. Soil OM 2. Soil microorganism that degrade carboncontaining pesticides are considered a. Autotrophs b. Chemotrophs c. Heterotrophs d. Phototrophs e. None of the above 3. The Philippine adopts the _____Soil Classification System a. United States Department of Agriculture (USDA) b. Food and Agriculture (FAO) c. International Soil Science Society (ISSS) d. Soil Science Society of America(SSSA) 4. The biochemical oxidation of ammonium to nitrate, predominantly by autotrophic bacteria a. Denitrification b. Ammonium fixation c. Nitrification d. Immobilization 5. In strongly acid soils, the availability of most micronutrients cation is a. Increased b. Decreased c. Not affected d. Remains the same 6. The percent water remaining in soil 2 to 3 days after its having been saturated and after free drainage has practically ceased a. Permanent wilting point b. Wilting coefficient c. Plant available water d. Field capacity 7. Most of the N in the soil solid fraction of the soil is in the form of a. Ammonium N b. Nitrate N c. Nitrite N d. Organic N e. Fixed N 8. Nitrate is not removed from the soil system by which of the following a. Leaching b. Plant uptake c. Nitrogen fertilization d. Erosion e. Run-off [Show More]

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