nutrient concentrations in the soil solution and shallow ...atlas.massey.ac.nz/courses/171305/yield...
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Creating Yield Maps &
Turning them into
Money Making
Management Tools
presented by:
George Vellidis
for the Precision Farming Team
National Environmentally Sound Production Agriculture Laboratory
Part of Presentation given at Smart Farming, Putra Malaysia
The Power of the Yield Map
1996
peanut
yield
map
Comparison of parasitic nematode
incidence to peanut yield
Sequential Profit Maps
corn map
1996corn map
1995
peanut map
1997
$200 and above
-$200 and below
-$100 to $100
Field A10
Early County, Georgia
Grain Yield Monitors
The first yield monitors
Available commercially for at least 5 years
At least 5 companies offering systemsJohn Deere (GreenStar)
Case IH (AFS – Advanced Farming Systems)
CLAAS – Quantimeter
AGCO – FieldStar
Ag Leader (independent)
Micro Trak (independet)
Customized for more than 70 combines
Reliable, user friendly, excellent support
Display has multiple uses
moisture sensor
force plate
yield sensor
Ag Leader force plate yield sensor
Universal displaycan mark problem areas
in or landmarks in fields
touchscreen interface
force plate
yield sensor
moisture sensorAFS display
Quantimeter
Quantimeter Display
Level Detector
Paddle Wheel
Claydon Yield-O-Meter
volumetric grain yield
monitor
AGCO
Fieldstar terminal
(standard on all combines)GPS control unit
implement
computerdata card and
data card reader
office PC & printer
(not included)
Interpreting Corn Yield Maps
A – variety change
B – drainage problems
C – low wet area
D – recently cleared land
E – end row compaction
F – soil type change
G – mechanical problem
H – grassed waterway
80 180120 160
Yield – bu/ac
Cotton Yield Monitors
Used mostly in the U.S. and Australia
Available commercially for the past 4 years
At least 4 companies offering systems
Agriplan/Zycom
Ag Leader
Farmscan
Micro Trak
Zycom
Uses 3 infrared light emitters and receptors per sensor
Counts when cotton passing through duct breaks infrared beam
Emitters
Micro-Trak
Uses 8 infrared light emitters and receptors per sensor
Counts when cotton passing through duct breaks infrared beam
closed unit
open unit
Emitters
Graintrak
Campbell Scientific
Designed for crops which pass
over a conveyor during harvesting
Root crops – potatoes, sugar beets,
onions, horseradish, etc. (USA)
Processing tomatoes (California)
Grapes (Australia)
Campbell Scientific
load cell supporting
conveyor idler
Sensors Load cells
Travel speed
Belt speed
Run/hold
GPS
potato harvester
horseradish harvester
PYMS Components
5k load cellsdata acquisition
board
Omnistar DGPS
antenna
palmtop computer
swath width
indicator
junction box
Field Testing: Weighing
• Four Intercomp 5000 kg portable scales
• Accuracy ±1% of total load
• Interconnect cable for totalizing and zeroing
• Sturdy, all aluminum, and self-contained
Pecan Yield Monitoring
Prototype monitor developed during 1998
Preliminary testing conducted over approximately 12 ha
Initial data look promising but many issues yet to be addressed
Pecan Harvesting
shaking the treesharvesting wind rows
harvester conveyer
and traileremptying
harvesting trailer
Citrus Yield Monitoring
Prototype monitor developed
during 1999 by University of Florida
Preliminary testing conducted over
approximately 63 ha
Vegetable Yield Monitoring
Just beginning to address in Georgia
Many difficulties
Market vegetables harvested manually
by migrant laborers
Laborers paid by amount harvested
Harvesting procedures vary greatly
from farm to farm
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