Managing soil water 14 What factors determine how much water can be stored in

Managing soil water 14 what factors determine how

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Managing soil water 14. What factors determine how much water can be stored in soil (think inputs and losses)? How does the relationship between inputs (e.g, precipitation) and outputs (losses) vary as you move from a drier to wetter climate? True or false: Irrigation can be used to meet the gap between a climate’s precipitation and potential evapotranspiration rates. Discuss. 15. What are the two major categories of irrigation systems we described (broad overview)
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how do they differ with respect to what is controlling how water enters into soil what are some benefits and weaknesses of each kind? Provide two specific examples of each kind What are other functions that irrigation water provides to an agroecosystem than just watering the plant? 16. What are examples of some situations when it is necessary to provide for drainage of irrigated soils? What conditions are necessary to permit drainage of water from soil? Where is the drained water disposed of? 17. What is water use efficiency? Compare different ways it is measured. Why might it matter to debates about water use in agriculture? Soil biological processes 18. What are the general components of an oxidation-reduction reaction (write one out)? Give an example of one kind of reaction. Why are these reactions important for supporting microbial life and growth? 19. What are the major lifestyles of microorganisms? How do we distinguish organisms based on where they get energy, electrons and carbon. 20. What is lithotrophy. Give examples of lithotrophic organisms and indicate what they use as electron acceptors and what the end products are. Where do these organisms usually get their carbon if they don’t use organic compounds? 21. What is anaerobic respiration? Give 4 examples of anaerobic respiring groups of organisms and indicate what they use as electron acceptors and what the end products are. Where do these organisms get their electron donor? Their carbon?
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  • Fall '08
  • Staff
  • Bacteria, Mycorrhiza, Soil biology

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