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Sub-Surface Drip Irrigation
Using Water Precisely When Water is Scarce
By: Cody Konen
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First introduced in U.S. in 1960 (Dew Hose) Has become very popular since 1995 Showed significant advantages
◦ Increased Water Use Efficiency◦ Less water required◦ Precise placement of water and nutrients to plant
roots
Introduction of Sub Surface Drip
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Basic Layout
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Installing Tape (Dripper line)
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Tape to PVC connection (Low End)
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Close to water source and pumped by diesel or electric motor
Filter arrangement chosen by GPM of system
Fertilizer injection, and or acid injection Final filter to catch fine particles
Pump House
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Top end connection (Filters)
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Field valves
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System Controlling
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Depending on field size decides your water rate, zone size, and how many zones in the field
Inches of water applied per hour = (0.00221) X (flow rate, in GPM) / (# acres)
Lot more knowledge of where we are applying and how much than previous method of irrigation
Using less water
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Usually runs at least 10 days on normal year, on a hotter year may never shut it off
During this operation, we can fertilize crops with nutrients besides phosphorus due to our pH of water and contents will not mix
Apply chlorine for prevention of clogging each emitter
Weekly flushing of PVC and tape lines from debris
Operation
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Water Patterns
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What Clogged Emitters Look Like and What They Can Do
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Uses less water and less labor while keeping the same or better yields
Very expensive initial cost on a per acre basis
Only way we can no-till our crops used from this water source.
Overall Opinion