Post on 24-Mar-2020
Precision Agriculture and Decision Support Systems in Horticultural
Crops
Wolfram Spreer
Chiang Mai University
10/11/16 Precision Agriculture and Decision Support Systems in Horticultural Crops 1
Precision farming operations
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Precision irrigation
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Systems in Horticultural Crops3
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Sample collection and geo-referencing
Drying of samples
Soil analyses
Leon Mostacero, 2012
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Descriptive statistics
interpolation
Soil variability maps
Leon Mostacero, 2012
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Solenoid valves
Reference map
Positioning system
Leon Mostacero, 2012
Control system
monitoring
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Actual application
Water use of the machine
Application map
Leon Mostacero, 2012
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Lá
min
a (
mm
)
Lámina Aplicada Lámina colectada
Leon Mostacero, 2012
Control and operation
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Control and operation
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• Remote access to data
• Online control and operation
Automated irrigation
Automated irrigation
Greenhouse irrigation
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Automation in greenhouse
Decentrale relais
interface
Remote control via- Internet of things- peer to peer network
Control PC
Analogous input
Temeprature and humidity sensor
Radiation sum
Greenhouse
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Take me Home TomatoPong Yaeng, Chiang Mai
Fertigation
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Sensors for precision irrigation
• Climate data for climatic water balance (T, RH, u, Rad)
• Radiation sum
• Plant based sensors• Leaf temperature (CWSI)
• Sap flow
• Gas exchange
• Chlorophyll fluorescence
• Soil based sensors
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Thermal imaging
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Wiriya-Alongkornunpublished
Drought stress monitoring by root respiration
Experimental set up
23/08/16 Wiriya-Alongkorn et al.: Influence of water supply on CO2 concentration in the rootzone of split-root potted longan trees
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Moisture regime
23/08/16 Wiriya-Alongkorn et al.: Influence of water supply on CO2 concentration in the rootzone of split-root potted longan trees
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Volumetric substrate (sand) water content (SWC) of ten split-root potted longan trees.
Wiriya-Alongkorn et al., 2016
Rootzone CO2 concentration
23/08/16 Wiriya-Alongkorn et al.: Influence of water supply on CO2 concentration in the rootzone of split-root potted longan trees
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Increase in CO2 concentration as indicator for CO2 production by roots and substrate water
content (SWC) on the left side (A) and on the right side (B) of split-root potted longan trees.
Wiriya-Alongkorn et al., 2016
Influence of temperature
23/08/16 Wiriya-Alongkorn et al.: Influence of water supply on CO2 concentration in the rootzone of split-root potted longan trees
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Average daily ambient temperature and CO2 concentration as indicator for CO2
efflux from the rootzone in the control during the time of experiment.
Wiriya-Alongkorn et al., 2016
Continuous Monitoring of CO2
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Spohrer et al., 2016
Need for drainage
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GPS basics
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dGPS
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Water logging management
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Water logging management
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Visualization of flow
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Precise field levelling
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Combined application
23/08/16 Wiriya-Alongkorn et al.: Influence of water supply on CO2 concentration in the rootzone of split-root potted longan trees
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Direct injection
23/08/16 Wiriya-Alongkorn et al.: Influence of water supply on CO2 concentration in the rootzone of split-root potted longan trees
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23/08/16 Wiriya-Alongkorn et al.: Influence of water supply on CO2 concentration in the rootzone of split-root potted longan trees
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23/08/16 Wiriya-Alongkorn et al.: Influence of water supply on CO2 concentration in the rootzone of split-root potted longan trees
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Precision
Weed-control
23/08/16 Wiriya-Alongkorn et al.: Influence of water supply on CO2 concentration in the rootzone of split-root potted longan trees
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Wegener et al., 2016
Orchard sprayers
• Gap detection
• Recovery
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Pesticide application by UAV
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Pesticide application by UAV
• Promising technology
• Unsuitable to replace field sprayers
• Potential for SE Asia
• Need for dGPS control
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