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Container Plant Irrigation Considerations

Container Plant Irrigation Considerations. Tom Yeager Department of Environmental Horticulture. Apply Irrigation Uniformly as the Amount Needed. Application Amount. Distribution Uniformity. What impacts the uniformity of delivery?. Overhead sprinkler. Design: spacing.

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Container Plant Irrigation Considerations

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  1. Container Plant Irrigation Considerations Tom Yeager Department of Environmental Horticulture

  2. Apply Irrigation Uniformly as the Amount Needed Application Amount Distribution Uniformity

  3. Whatimpacts the uniformity of delivery? Overhead sprinkler

  4. Design: spacing

  5. Design: pressure Take into account slope 2.31 ft = 1 psi

  6. Design: pressure Pressure loss due to friction for 100 ft Sch. 40 PVC pipe

  7. Maintenance Remove obstructions inside and in front of emitters

  8. Monitor uniformity and application amount

  9. 53 56 61 66 53 56 61 66 47 47 49 61 57 49 57 61 42 43 42 53 50 43 50 53 40 41 48 49 49 48 40 41 51 16 816

  10. 53 56 61 66 53 56 61 66 47 47 49 61 57 49 57 61 42 43 42 53 50 43 50 53 40 41 48 49 49 48 40 41 51 16 816

  11. Calculation for Uniformity Low quarter average (ml) Distribution Uniformity = Overall average (ml) 40+41+42+43 = 166 = 41 166 4 41 80% DU = 0.80 = 51

  12. Convert Volume to Application Depth 51 ml or cm3 Average volume applied = = 0.9 cm 57 cm2 Cup area = 3.14 x 4.25 2 = 0.9 cm = 0.4 inch 2.54 cm/ inch

  13. 57 cm2 51ml or cm3 = 0.4 inch 57 cm2 51 cm3

  14. Summary Determine distribution of water over the area Amount applied per duration of irrigation http://edis.ifas.ufl.edu/ep458 Application Amount Distribution Uniformity

  15. Match Water Demand with Application Amount Overhead sprinkler

  16. Are there differences in water demand? Species

  17. Plant water demand or loss (inch/container) August July 3- gal Salmon’s Nursery, FL Podocarpus 0.33 Rhaphiolepis0.35 Rosa 0.38 Loropetalum0.39 Ilex 0.44 Rhododendron 0.47 Viburnum0.53 Saunder’s Nursery, VA Rhododendron 0.32 Spiraea0.33 Weigela 0.35 Hydrangea0.38 Gardenia 0.39 Berberis0.50 0.07 0.14

  18. Are there differences in water demand? Can you manage for the species differences?

  19. Calculation for Uniformity Low quarter average (inch) Distribution Uniformity = Overall average (inch) Overall Average – variation between species = number to exceed so sprinkler variation does not overcome species variation 0.26 65% DU = 0.65 = 0.40 0.40 – 0.14 = 0.26

  20. Are there differences in water demand? Species Spacing

  21. Container Water Loss for 3-gal Ligustrum July June Water loss (inch) 0.30 0.33 0.36 0.40 0.10 Spacing (inch) 0 2 4 6 Spacing (inch) 0 3 6 9 Water loss (inch) 0.32 0.38 0.42 0.45 0.13 Million and Yeager, SNA 2013

  22. Spacing 0 inch 5.5 inch 11 inch 16.5 inch 52 35 24 % Cover 95 520 ( 30%) 570 ( 45%) 610 ( 50%) Wt. loss (g) 400 ETc (inch) 0.25 0.33 0.360.39 Light interception per plant Temp.

  23. Dwarf Yaupon 1-Gallon 2013

  24. Are there differences in water demand? Species Spacing Size

  25. Plant Water Demand Affected by Plant Size 1-gal Viburnum - spring planting Water loss (inch) Size index (cm) Day

  26. Match Water Demand Species Spacing Size With Application Amount Overhead sprinkler

  27. Capture Factor (CF) = Volume captured Volume captured

  28. Canopy Affects Capture of Irrigation and Rain

  29. Match Water Demand Species Spacing Size With Application Amount Capture Factor Overhead sprinkler

  30. How Do We Use This and Other Information? Match Water Demand with Application Amount

  31. Thanks for Your Support! Center for Applied Nursery Research Florida Nursery, Growers and Landscape Association Saunders Brothers Nursery Salmon’s Wholesale Nursery Southwest Florida Water Management District

  32. http://hort.ufl.edu yeagert@ufl.edu

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