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Soil Science MCQs

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1. : The scientific study of soil is called:





2. : The topmost layer of soil, rich in organic matter and microorganisms, is called:





3. : The vertical section of soil showing different layers is called:





4. : Which soil texture is considered the most ideal for agriculture?





5. : The process of soil formation is known as:





6. : The soil layer composed of unweathered rock material is called:





7. : Which horizon is commonly called the “zone of leaching”?





8. : Which soil type is best known for its high water-holding capacity?





9. : The pH of acidic soils is usually:





10. : Which soil-forming factor is considered the most important?





11. : Black soils in India are also called:





12. : The capacity of soil to supply essential nutrients to plants is known as:





13. : The structure of soil refers to:





14. : The measure of soil’s ability to store cations is called:





15. : Which microorganism is most important for nitrogen fixation in soils?





16. : Laterite soils are generally poor in:





17. : Soil erosion by wind is most common in:





18. : The bulk density of soil is defined as:





19. : Which color of soil indicates good organic matter content?





20. : Saline soils are characterized by:





21. : Soil porosity depends mainly on:





22. : Which soil conservation practice involves plowing along the contour lines?





23. : Which soil property is most important for plant root aeration?





24. : The soil moisture available to plants is stored between:





25. : The ultimate aim of soil conservation is to:





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