SAC 101(ques).pptx powerpoint presentation

SAC 101(ques)

1. Important Questions SAC 101 FUNDAMENTALS OF SOIL SCIENCE Welcome

2. Study of earth crust Geology Pedology Petrology Edaphology 2. In which stage of weathering decomposition of easily weathered minerals occur Initial Juvenile Virile Senile

3. 3) The following order is correct regarding stages of weathering Initial > Juvenile > Virile > Senile > Final Initial > Juvenile > Virile > Final > Senile Juvenile > Virile > Senile > Final > Initial Senile > Final > Initial > Juvenile > Virile 4. The thickness of the crust is 5- 55 Km 5-60 Km 5-56 Km 5-45 Km

4. 5) The following earth sphere also called gaseous sphere Lithosphere Atmosphere Hydrosphere Pedosphere 6) A soil that has contain high proportion of clay is called Heavy soil Light soil Regosol Sodic soil 7) Disintegration and decomposition of rocks and minerals Weathering Podzolization Laterization Leaching

5. 8) Peeling away of surface layer from rocks due to changes in temperature Disintegration Decomposition Exfoliation Both a and b 9) Most important chemical weathering process is Hdrolysis Hydration Carbonation Oxidation 10) Soil is ----- dimensional body 2 1 3 4

6. 11)Which soil mineral that impart reddish brown colour to the soils? A) Gibbisite B) Diaspare   C)Haematite D)Limonite 12) Relative proportion of soil particle is known as A) Tilth B)Soil texture C)Field capacity D)Soil structure 13) The soils developed under the influence of parent material is termed as A) Endodynamomorphic B) Ectodynamomorphic C)Both A and B D ) None of these  

7. 14) The arrangement of primary soil particles into definite pattern is Soil texture Soil structure Soil consistency Porosity 15) Texture is mainly influenced by Parent material Climate Vegetation Organic matter 16) The particles which are gritty and easily seen Sand Silt Clay Loam

8. 17) Natural aggregates are called Peds Clod Fragments All of the above 18) Class of structure mainly determined by Shape and arrangement Size Durability Distinctness 19) Flesh of the soil is Clay Sand Silt Loam 20) For naming soil structure we must follow Grade > class > type Class > grade > type Grade > type > class Class > grade > type

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