Ten Agricultural and Biological Engineering Achievements that
Changed the World
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10 Engineering Achievements 1.Development of the Agricultural
Tractor 2.Rural Electrification 3.Self-Propelled Combine 4.Center
Pivot for Irrigation 5.International Harvester Cotton Picker
6.Milking Machine 7.Conservation Tillage 8.ASABE Standardization
Procedure 9.Rubber Tires on Tractors 10.Refrigerated On-Farm Milk
Storage
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The Influence of Precision Agriculture !
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Precision Agriculture Precise information on agronomic factors.
Precise selection and placement of crop inputs. Precise position
and travel information.
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GPS Systems
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GPS Global Positioning System Characteristics Free Accurate
Reliable Worldwide Unlimited user capacity 60s TRANSIT doppler
system 95 Fully Operational Condition (FOC)
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SOME GPS APPLICATIONS MILITARY MARITIME AUTOMOTIVE SURVEYING
AVIATION AGRICULTURE FORESTRY ENVIRONMENTAL PUBLIC SAFETY HIKING
HUNTING NATURE STUDY FISHING BOATING BIKING SKIING SNOWMOBILING
GEOCACHING GOLF ! COMMERCE & GOVERNMENT RECREATIONAL
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Space Segment 28 Rockwell satellites 7.5 yr life span 6 orbital
planes @ 55 degree orbits 2 orbits everyday Very high orbit (20,200
km) Radius of Earth ~ 8000 mi (~12,900 )
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How GPS works Satellite signals are broadcast at the speed of
light (186,000 miles per second) Distance to satellite =11,200
miles 300,000 km/s a 1/1,000,000 sec Error =>300 m pos.
Error
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Precision Agriculture: Systems Approach Right source Right rate
Right time Right place
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Section Control Systems
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All Machinery must pay
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Precision Technology Use
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Precision Ag Services Offered
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Whos Leading the Green Index?
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Ag Journey
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Innovation
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Automated Guidance Implement Guidance Variable Rate Overlap
Switching Data Transfer 12.0% 3.0% 7.3% 4.6% ? 12.0% Total Savings
Value Proposition 15.0%22.3%26.9% >26.9% Engineers working on
Automatic Guidance and Precision Agriculture have increased
productivity by 27% in the last 14 years
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GPS Options for Ag Autonomous 50 - 100m S/A DGPS.5 - 5m RTK
Float 20cm RTK Fixed 1cm GPS 7 - 10m
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DGPS Accuracy Trimble Units
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Sprayer Navigation
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GPS Navigation Aids:
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Reliable and more accurate Accuracy at higher speeds Easily
used with spinner spreaders Easy to use less skilled operator
Effective over growing crops Allows operation when visibility is
poor Less affected by weather Lower recurring costs Reduces
operator fatigue and eye strain Lower set-up time Not effected by
wind or boom bounce Reduces overlaps and skips Reduces need for
people in sprayed areas