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Chapter 8

Chapter 8. Water Conservation. Objectives. Explain the source of our fresh water supplies Explain the need for water conservation Describe ways to make better use of water Discuss water quality. Aerationturf Antitranspirants Aquifer Arid climate Buffer strips Conservation tillage

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Chapter 8

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  1. Chapter 8 Water Conservation Soil Science & Management, 4E

  2. Objectives • Explain the source of our fresh water supplies • Explain the need for water conservation • Describe ways to make better use of water • Discuss water quality Soil Science & Management, 4E

  3. Aerationturf Antitranspirants Aquifer Arid climate Buffer strips Conservation tillage Consumptive use Contour tillage Evapotranspiration Furrow-diking Groundwater Hydrologic cycle Hydrophilic gel polymers Mulch Non-point sources Point sources Precipitation Runoff Terms to Know Soil Science & Management, 4E

  4. Terms to Know • Semiarid climate • Soil pitting • Strip-cropping • Stubble-mulching • Subsoiling • Surface water • Syringing • Terrace • Water table • Water-use efficiency Soil Science & Management, 4E

  5. The Hydrologic Cycle Figure 8-1 Soil Science & Management, 4E

  6. Water Resources in the United States Figure 8-2 Soil Science & Management, 4E

  7. Water Resources in the United States Figure 8-4 Soil Science & Management, 4E

  8. Reasons for Conservation Figure 8-5 Soil Science & Management, 4E

  9. Reasons for Conservation • Preservation of water resources • Increased yields • Reduced runoff Soil Science & Management, 4E

  10. Water Use Efficiency • Capture more water from precipitation • Reduce consumptive use • Improve irrigation systems Soil Science & Management, 4E

  11. Capturing Water in Soil • Improve filtration • Lower percolation Soil Science & Management, 4E

  12. Capturing Runoff • Improving water intake rate Figure 8-10 Soil Science & Management, 4E

  13. Capturing Runoff • Capturing snowfall • Reducing percolation Soil Science & Management, 4E

  14. Reducing Consumptive Use • Reducing evaporation • Reducing transpiration Soil Science & Management, 4E

  15. Reducing Consumptive Use • Improving plant-use efficiency Figure 8-13 Soil Science & Management, 4E

  16. Water Quality • Water quality is as important as water quantity Soil Science & Management, 4E

  17. Summary • Major water supplies • Rainfall • Fresh surface water • Groundwater • Best water use increases yields • Erosion controlled • Improve water use efficiency • Consumptive use reduced • Attention to contribution to water pollution Soil Science & Management, 4E

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