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Using Technology to Make Irrigation Scheduling Easier
- 1. Using Technology to MakeIrrigation Scheduling Easier Aaron Nygren and Laura Dotterer UNL - Extension
- 2. ET Calculations • ETGage Change _______ in inches • Multiplied by crop coefficient from chart ______ • = ______ inches of crop water use in last week
- 4. Watermark Calculations • Soiltexture of plot__________________ • Average of sensor readings down to 3 feet _______ • Trigger point for soil type _________ • Should we be irrigating?
- 6. Easier Ways toDo Calculations
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- 8. Readily available soilwater left at 50% of the field capacity • • • • • • • East 100 % plot 1 foot = ________ inches 2 foot = ________ inches 3 foot = ________ inches Total Water depleted = ________ inches Percent depleted down to 3 feet = ________ percent of field capacity
- 9. CropWater app: Still under development, but shouldbe release this year
- 10. Predicting the LastIrrigation of the Season • If the plot was at R5, ½ milk line – Full dent, would we have enough water to finish the crop?
- 12. • Water useto maturity from R5, ½ milk line = ________ inches
- 13. • Percent remainingavailable water when drying soil down to 60 percent of field capacity = 60 percent minus ________ percent depleted down to 3 feet (from above) = ________ percent remaining
- 14. • Then multiplypercent remaining times ________ inches of water available at field capacity per foot = ________ inches remaining • Then subtract water use to maturity from inches remaining = ________ inches needed to finish crop
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- 20. The Profiler • Cost:$1995 to purchase control box, brackets, solar panel, and 3 sensors. Additional sensor is available for $119.50 and the rain bucket can be added for $149.50. After the first year there is an annual modem/web fee of $250. • Signal: Cellular • Sensor: Uses Watermark soil water sensors • Website: http://theprofileronline.com
- 23. AquaCheck • Cost: Standardpackage with 40” probe, tipping bucket rain gauge, install/extract is $4500 for 3 years, but local dealer pricing may vary. At the end of 3 years, customer owns the hardware and would pay a $495 modem/web fee plus local dealer service cost for install/extract unless customers do installation themselves, which should be possible with proper training. • Signal: Cellular or satellite for a higher fee • Sensor: Standard probe has 6 capacitance sensors and temperature sensor with depth to 40”. • Websites: http://www.aquachecktech.com/
- 26. Aqua Spy • Cost:Lease with no ownership, maintenance, or other fees for 1 probe, 1 telemetry system with installation, extraction, service, and agronomic training is $2200 for first year, and $1700 for second year. Discounts are available for early buy and volume pricing, which brings the average customer cost down to $1400 in the second year. • Signal: Cellular • Sensor: Standard probe is 40” deep with 10 capacitance sensors space every 4” apart. Also has a temperature probe at 4” depth. • Website: http://www.aquaspy.com/
- 29. Adcon • Sensor: Capacitancesensor with one sensor every 10 cm. • Website: http://www.adcon.com/
- 32. Other Companies -Irrometer
- 33. John Deere WaterSystem
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- 35. NeRain • http://nerain.dnr.ne.gov • NebraskaRainfall Assessment and Information Network with updated daily rain gage rainfall amounts from weather watchers
- 36. Spatial Rainfall Consulting •http://www.spatialrainfallconsulting.com/ nexradrainbeta.html • Nexrad radar precipitation maps showing rainfall amounts for 2.5 by 2.5 mile grids • http://www.spatialrainfallconsulting.com/n exradrain.html • Nexrad radar precipitation graph showing rainfall amounts for 2.5 by 2.5 mile grids over user defined time period
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