13 how do plants influence erosion 14 even though

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13. How do plants influence erosion? 14. Even though some deserts have been in existence for thousands of years, why is the soil there considered to be very young? 15. In which soil horizon are the most roots and biological activity found? 16. What is soil texture and what are the components that contribute to a soil’s texture? 17. What is soil structure?
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18. What are the differences between mollisols, spodosols, and oxisols? 19. What is soil pH and what is the pH range that most plants can grow in? 20. How does cation exchange capacity (CEC) influence a soil’s ability to hold the positively charged plant nutrients such? 21. What are saline and sodic soils? 22. What are the ways that soil organisms act on the soil? 23. What do plants get from the mycorrhiza relationship? What do legumes get from Rhizobium ? What do the mycorrhizia fungi and the Rhizobium get in return? 24. What does the decomposition of organic matter provide for plants? 25. What is humus and how does it affect soil characteristics? 26. What is C:N in terms of a soil characteristic? 27. Along with erosion, what is another factor that contributes to soil degradation?
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  • Fall '19
  • basic components of soil

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