logging in or signing up High Tunnel Overview hicksmd Download Post to : URL : Related Presentations : Let's Connect Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 123 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: March 19, 2013 This Presentation is Public Favorites: 0 Presentation Description David Trinklein, MU Professor of Plant Sciences, gives an overview of high tunnel types and construction on January 28, 2013. Comments Posting comment... Premium member Presentation Transcript PowerPoint Presentation: High Tunnel OverviewIf this is a tunnel,: If this is a tunnel , What is a high tunnel?PowerPoint Presentation: A high tunnel is a plant forcing structure that: 1. Uses solar heat (back-up heaters optional). 2. No electricity (fans, heaters, etc.). 3. Vented through sidewalls or end walls. 4. Single layer of plastic. Ground (bed) culture. Drip irrigated. “Poor man’s greenhouse”. University of Missouri High Tunnels, Columbia MOPowerPoint Presentation: University of Missouri High Tunnels, Bradford Cntr . Advantages of High Tunnels: Frost protection +4 F. Extend growing season 2-4 weeks Protection from insects/weather Produce more crops per unit area Produce better quality & increase profitsDisadvantages of High Tunnels: Disadvantages of High Tunnels Requires frequent temperature monitoring High humidity early in season can lead to increased disease problems Snow accumulation a concern Represents added production costPowerPoint Presentation: Early season tomatoes bring a premium price.PowerPoint Presentation: Field Tomato Production High Tunnel Tomato ProductionPowerPoint Presentation: Year-round vegetable production is possible within a high tunnel.PowerPoint Presentation: High tunnel lettuce and salad greens in fall and winterPowerPoint Presentation: Row covers give greater winter protectionAdditional High Tunnel Crops: Additional High Tunnel Crops Cucumbers & melons Strawberries Cut flowers Pepper & eggplantHigh Tunnels vs. Greenhouses: High Tunnels vs. Greenhouses High Tunnels Passive climate control—labor intensive Limited protection from cold temps Simple to build, low initial cost & inexpensive to operate Greenhouses Active climate control—totally automated Maximum protection from cold temps Complex to build, high initial cost & expensive to operatePowerPoint Presentation: Types of High TunnelsPowerPoint Presentation: Quonset style bow (rib) purlin side posts baseboard hip boardQuonset: Quonset Semi-circle (“quick-set”) with side walls Easy to construct “Inexpensive” Easy to cover (plastic) Most common type high tunnel Snow tends to accumulate on ridgePowerPoint Presentation: Weakest pointPowerPoint Presentation: 20 FT. WIDE; 96 FT. LONG; 9-12 FT. HT QUONSET-SHAPED 20 ft. width x 9-12 ft. height 39”-60” sidewalls Bows spaced 4-6’ apart (depends on pipe diameter) Quonset StylePowerPoint Presentation: Penny wise—pound foolishPowerPoint Presentation: Ventilation is importantPowerPoint Presentation: Ridge Vent Removable panels End wall ventilationPowerPoint Presentation: Gothic Arch StyleGothic Arch: Gothic Arch More traditional “greenhouse” shape More useable space, head and growing room Sheds snow/ice betterPowerPoint Presentation: PVC High TunnelPowerPoint Presentation: Moveable High TunnelPowerPoint Presentation: Multi-bay (Connected) High TunnelsPowerPoint Presentation: Multi-bay interiorPowerPoint Presentation: Large high tunnels lose heat at a slower rate. Large high tunnels prevent high humidity levels. Large high tunnels have greater light intensity per sq. ft. Size ConsiderationsPowerPoint Presentation: Large High Tunnels: 20-30’ wide x 96-196’ longPowerPoint Presentation: 22’ Large Door for Equipment Access and VentilationPart II: High Tunnel Construction : Part II: High Tunnel ConstructionSite Selection: Site Selection Availability of sunlight Drainage Soil type/history Prevailing windsPowerPoint Presentation: High Tunnel Orientation North – South ? East -- West ? N S W E “Does it make a difference?”Prevailing Summer Winds: Prevailing Summer Winds High TunnelPowerPoint Presentation: Covering Material Quality of light transmission P.A.R. (photosyntheticaly active radiation) I.R. (heat) Longevity Expense (initial vs. long-term) Ease of applicationPowerPoint Presentation: Polyethylene PlasticPowerPoint Presentation: Shade cloth for summer productionBuilding Materials: Building Materials Wood Resistant to decay Redwood Cyprus Treated Paint Cuprinol CCA alternativesPowerPoint Presentation: No coal tar creosote or penta-chlorophenol treated woodBuilding Materials: Building Materials Metal Cold rolled steel pipe Galvanized Minimum 1½ inch diameter 50/55 strength rating Space according to strengthPutting It All Together : Putting It All Together Pythagoras en.wikipedia.orgPowerPoint Presentation: Square the Sides/Ends 30’ wide 60’ long a 2 + b 2 = c 2 a b c Space and Drive Anchor Stakes: Space and Drive Anchor StakesPowerPoint Presentation: Anchor Stakes CompletedAssemble Bows/Ribs: Assemble Bows/RibsInstall Bows/Ribs: Install Bows/RibsAttach Purlins: Attach Purlins purlinAssemble Trusses (If Needed): Assemble Trusses (If Needed) cross trussInstall Diagonal (Wind) Bracing: Install Diagonal (Wind) BracingInstall Baseboards and Hip Boards: Install Baseboards and Hip Boards Hip Board (2x6) Baseboard (2x8)Add Endwalls/Doors/Vents: Add Endwalls /Doors/VentsAttach Covering Material: Attach Covering MaterialFinished High Tunnel: Finished High TunnelHigh Tunnel Summary: High Tunnel Summary Popular worldwide Widespread and successful in the Midwest Improve yield, quality, and extend the season Higher value and productive crops are favored as choices Almost every vegetable farm tour in Missouri includes a high tunnelHigh Tunnel Budget : High Tunnel Budget Basic kit* (2 3 / 8 ’’ -- 14 gauge galvanized pipe) Frame, braces, purlins , treated-wood end walls, plastic, misc. hardware $7606 Door package 8’ high x 10’ wide (each end) $ 861 Hardware Nails, screws, etc. $ 50 Miscellaneous Not included above $ 150 Water Frost-proof hydrant $ 122 Labor 64 man-hours @$12.00 $ 768 Grand Total $9557 $3.32 / ft. 2 (30’ x 96 w/5’ sidewalls) * Zimmerman brand, FOB Barnett, MOResources & Photo Credits:: Resources & Photo Credits: www.hightunnels.org http://extension.missouri.edu/p/M170 Rutgers Cooperative Research & Extension Dr. Lewis Jett, West Virginia Univ. Extension Mr. James Quinn, Univ. of Missouri ExtensionPowerPoint Presentation: David Trinklein Assoc. Prof. Plant Sciences University of Missouri Questions? Useful reference site: www.hightunnels.org You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.