Notes
Slide Show
Outline
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Essential Structure of a Successful Institutional Education Program
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Major Issues in the Southwest Agriculture
  • Irrigation
  • Water availability
  • Use of non-potable water for irrigation
  • Water quality
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 Water Conservation Tips
  • 1. Irrigate at night or early morning.
  • 2. Apply less water, more frequently.
  • 3. Consider the soil texture to decide how much water & when to apply.
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"4"
  •  4. Use drought-tolerant & dwarf  plant species/cultivars.
  • 5. Check the weather forecast for precipit. before irrigating.
  • 6. Use irrigation method required less water.
  • 7. Core cultivate compacted soils.
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Arizona Turf Industry
  • Golf: over 300 courses,  over $1 billion sales, over 17,000 FTE (full-time equivalents)
  • Sports turf: spring training center of U.S. baseball
  • Landscape industry primarily focused on xeriscape
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Arizona Landscape Irrigation Policy
  • 4.6 acre feet ground water on facilities >10 acres
  • Required use of effluent or other secondary sources where available
  • Other states with similar policies: CA, NV
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Effluent Salinity Tolerance of Modern Turf Cultivars
  • Funded by AZ Dept. Water Resources & AZ-GCSA
  • Advantages of hydroponics for cultivar screening
  • Test solution ion balance patterned after Arizona effluent
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Native Species
  • Alkali sacaton
    • Sporobolus airoides
  • Sideoats grama
    • Bouteloua
  • Saltgrass
    • Distichlis spicata


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Salt Tolerance of Native Species
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Drought Tolerance of Distichlis (salt-grass) [left to right Marcum & Pessarakli]
  • Competitive soil moisture dry-down
  • Fritted clay media having known water potential release
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Development of Distichlis into a Turfgrass
  • Funded by USGA
  • Collaboration with Colorado State Univ.
  • 21 Distichlis accessions evaluated for turf quality, salinity and drought tolerance
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Water Requirement/Drought Screening Techniques
  • Controlled plot irrigation based on ETo or soil moisture status
  • Lysimetry
  • Soil moisture monitoring
  • Pot dry-down
  • Flexible rooting tubes
  • Polyethylene glycol water culture
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Salinity and Heat Tolerance Screening Techniques
  • Salinity Tolerance Screening:         Solution culture
    • Hydroponics
    • Potted plant cycling drip
  • Heat Tolerance Screening: Photosynthetic fluorescence  Membrane thermostability
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Arizona Turf Conference
  • Annual, two-day event
  • Multiple seminars covering turf management, irrig., landscape, pesticide calibration/use
  • GCSAA and State pesticide credits awarded
  • Attendance typically 100
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   AZ Field Days
  • Annual, all-day event
  • Tours of turf research plots
  • On-site discussions
  • Distribute annual research report
  • Attendance typically 100
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Arizona GCSA Regional Seminars
  • Morning seminars given, focusing on a specific topic
  • Catered lunch
  • Afternoon golf
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Group Tours
  • College and high school classes from around the state
  • Special working groups:
    • Landscapers
    • Sports turf mgrs.
  • International groups


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Teaching
  • Turf courses – GCSAA curriculum
  • Turf internship
  • Turf independent studies
  • U.A. turf club – a GCSAA chapter
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Front Row (left to right): Pessarakli (3rd), Huber (4th), the rest, graduate students & Post Docs.