Download - Soil Science Ppt
Practice Test in Soil Science
Source: UPLB and CLSU reviewer
Prepared by: Reynro T. Herrera
1. Soil texture is a permanent physical property. It could be determined by:
a. “Feel” methodb. Pipette methodc. Hydrometer methodd. All of the above
2. Soil texture could be determined in the laboratory by;
a. Ammonium acetate methodb. Buoyancy methodc. Hydrometer methodd. Pycnometer method
3. A soil textural class where the coarseness of sand, the smoothness feel of silt and the stickiness of clay are manifested in almost equal proportion in this soil mass.
a. Sandb. Siltc. Clayd. Loam
4. Characteristic feel of silt separates when rubbed in between the finger is:
a. Coarseb. Grittyc. Sticky when moistd. Floury
5. Type of soil structure that is best for growing upland crops
a. Massiveb. Platyc. Granular or crumbd. Single-grain
6. The color of the soil indicates some chemical conditions. Which statement describes the relationship of color with other properties?
a. Dark or black color indicates high organic matter
b. Reddish brown color indicates that the soil is high in oxides iron
c. Moist soil is darker than dry soild. All of the above
7. Movement of water in the soil always from:
a. Higher to lower soil moisture contentb. Higher to lower total potential energyc. Higher to lower moisture tensiond. All of the above
8. Lowland rice prefers to have soil consistency of:
a. Hardb. Friablec. Plasticd. Viscous or liquid
9. Soil grown to corn is best cultivated when the soil consistency is;
a. Hardb. Friablec. Plasticd. Viscous
10. A clay pot is molded at this soil consistency:
a. Hardb. Friablec. Plasticd. Viscous
11. The most diverse group of soil organisms are the:
a. Annelidsb. Helminthesc. Nematodesd. Arthropods
12. In terms of biomass, the most dominant soil microorganisms are;
a. Bacteriab. Algaec. Fungid. Actinomycetes
13. In flooded soils nitrate undergoes reduction and is lost as gas, this process is known as:
a. Denitrificationb. Nitrificationc. Nitrogen fixationd. Volatilization
14. Under anaerobic condition, the most active OM decomposers are:
a. Fungib. Bacteriac. Algaed. Actinomycetes
15. Which is a non- N2- fixing plant?
a. Ipil-ipilb. Narrac. Acaciad. Corn
16. Organic fertilizer produced from the bird and bat manure
a. Compost b. Guanoc. Humusd. Vermicompost
17. During the decomposition of organic matter, organic acids are also produced. Which of the following is an organic acid?
a. H2SO4
b. HNO3
c. H2CO3
d. H2SO4
18. Effective microorganisms can be used to enhance decomposition of organic materials. Which of the following is not a component of EM:
a. Rhizobiumb. Lactic and bacteriac. Photosynthetic bacteriad. Yeast
19. A civil engineer who is studying about the origin of the soil can be a:
a. Edaphologistb. Pedologistc. Petrologistd. Anthropologist
20. The study of rock is:
a. Mineralogyb. Rockologyc. Petrologyd. Hydrology
21. A water fern that fixes nitrogen and is used as a biofertilizer
a. Kangkongb. Azollac. Water lilyd. Lotus
22. The true soil corresponds to horizon:
a. Cb. ABc. ABCd. ABCD
23. The molten mass from where igneous rocks solidify from:
a. Coreb. Magmac. Mantled. Soil
24. Metamorphism is caused by:
a. High pressure and temperatureb. Floodsc. Erosiond. Earthquake
25. The main objective of physical weathering is:
a. Increase total surface area for chemical weathering
b. Weaken rock by removal of basesc. Produce clayd. Leaches bases
26. The sedimentary rock that contains clay minerals as one of its more important constituents is:
a. Shaleb. Limestonec. Sandstoned. Slate
27. The loam soil has:
a. Macropores>microporesb. Macropores<microporesc. Micropores=macroporesd. Zero pore spaces
28. A problem soil usually found in coastal areas characterized by excessive amount of salts in the soil solution.
a. Acidb. Salinec. Alkalined. Pest
29. The required pH of an acid soil that needs liming is:
a. >6.5b. <5.0c. >5.0d. <7.5
30. The fertilizer grade 10-12-10 means:
a. 10%N-12%P-10%Kb. 10%N-12%P2O5-10%K2Oc. 10kgN-12kgP-10kgPd. 10kgN-12kgP2O5-10kgK2O
31. What particular group of parent materials is abundant in the Philippine soil?
a. Igneous rocksb. Sedimentary rocksc. Metamorphic rocksd. All of the above
32. The most abundant micronutrient in the surface soil is:
a. Manganeseb. Molybdenumc. Irond. Zinc
33. Which among the following has the highest N and P contents?
a. Poultry manureb. Goat manurec. Cattle manured. Guano
34. One ton of compost containing 1.5%N can supply how many kilogram of N?
a. 15 kgb. 1.5 kgc. 150 kgd. 1500 kg
35. Organic matter is important in soils because it improves the following except;
a. Soil lossb. Soil aerationc. Soil structured. Waterholding capacity
36. Proper tillage is one of the soil fertility management practices and the purpose of which is;
a. Encourage soil compactionb. Reduce porosityc. Increase bulk densityd. Obtain desirable soil structure
37. Deficiency indicates low level of nutrients element while excessive level of nutrient element is
a. Sufficiencyb. Toxicityc. Hidden hungerd. Luxury consumption
38. The movement of materials out of a portion of a soil profile…
a. Eluviationb. Illuviationc. Bothd. Erosion
39. In very extremely acidic soil (pH 4.5-5.0), these elements are toxic to plants except:
a. Aluminumb. Calciumc. Irond. Manganese
40. The softest mineral in Moh scale is:
a. Diamondb. Talcc. Quartzd. Apatite
41. The hardest mineral in Moh scale is:
a. Diamondb. Talcc. Quartzd. Apatite
42. Parent material deposited in lake is:
a. Alluviumb. Lacustrinec. Marined. Tuff
43. A soil with bulk density of 1.3g/cm3 and particle density of 2.60g/cm3 will have a porosity of;
a. 5%b. 25%c. 50%d. 75%
44. The textural type of a given soil is best influenced by what type of weathering process?
a. Physical weatheringb. Chemical weathering c. Both a and bd. None of the above
45. How much complete fertilizer (14-14-14) is needed to apply per tree in an orchard plantation if the recommendation is 215-215-215 kg. of N-P205-K20/ha, with planting distance of 5 meters X 8 meters?
a. 6.14 kg of 14-14-14b. 6.14 kg of N-P2O5-K2Oc. None of the aboved. Both a and b
46. A 250 kg of potassium nitrate (17-0-17) is also the same as?
a. 42.5 kg of Nb. 42.5 kg of K2Oc. Both a and bd. None of the above
47. The optimum or ideal soil pH for growing most crop is
a. pH 5.0b. pH 6.5c. pH 7.5d. pH 8.0
48. The native supply of this nutrient generally comes from soil organic matter
a. Calciumb. Phosphorusc. Aluminumd. Nitrogen
49. This element has a critical role in sugarcane fertilization because of its function in the synthesis of sugar
a. Nitrogenb. Phosphorusc. Potassiumd. Calcium
50. Straight fertilizer
a. 16-20-0b. 14-14-14c. 46-0-0d. 0-0-60
#thanks for answering