precision irrigation by steven calhoun
DESCRIPTION
Precision Irrigation By Steven Calhoun. Irrigated cropland. Water is the most limiting resource for most producers in many regions. The law of minimum Limiting factor. Irrigated acreage . In 2008 US farmers and ranchers irrigated 54.9 million acres of farmland. Irrigation types. Surface - PowerPoint PPT PresentationTRANSCRIPT
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Precision IrrigationBy Steven Calhoun
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Irrigated cropland
• Water is the most limiting resource for most producers in many regions.
• The law of minimum – Limiting factor
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Irrigated acreage
• In 2008 US farmers and ranchers irrigated 54.9 million acres of farmland.
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Irrigation types
• Surface • Drip/micro • Pivot
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Flood/Furrow
• Uses gravity to transport water
• management practices to consider include precision land leveling
• Auto steer rows/channels
• Hard to control
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Flood/Furrow
• Water lost to runoff/evaporation
• Soil erosion
• Conventional tillage
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Surface Irrigation
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Drip/Micro
• High efficiency
• Well suited to automation
• Less labor intensive
• Precise application
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Drip/Micro
• Problems
• Water quality is very important
• Limited from deep tillage
• Initial cost
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Drip/mirco
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Drip/Micro
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Pivot
• Even application over field
• More efficient application
• Less runoff/evaporation
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Pivot
• Maintenance
• Tracks
• Move for field operations
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Variable Rate Irrigation
• provides precision control of all sprinklers on a pivot
• individually pulsing sprinklers
• http://www.youtube.com/watch?v=es_yv-NevTo&feature=player_embedded
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Variable Rate Software
• Rate management– Soil type– Dual crops
• Arial photo/Soil map
• Soil samples
• GPS recordings
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Variable Rate Irrigation
• Central controller
• Node
• Valve
• Easy to apply
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Variable Rate Irrigation
• http://www.youtube.com/watch?v=cXhB6A-p3R8&feature=player_embedded
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Questions?