The Use of Remote Sensing in Weed Control - PowerPoint PPT Presentation

View by Category
About This Presentation
Title:

The Use of Remote Sensing in Weed Control

Description:

The Use of Remote Sensing in Weed Control Joshua Bushong SOIL/BAE 4213 Spring 2008 Why Efficiency Low in areas of low populations Wasted herbicide Decrease cost with ... – PowerPoint PPT presentation

Number of Views:613
Avg rating:3.0/5.0
Slides: 19
Provided by: JoshuaA5
Category:
Tags: control | remote | sensing | soil | use | weed

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: The Use of Remote Sensing in Weed Control


1
The Use of Remote Sensing in Weed Control
  • Joshua Bushong
  • SOIL/BAE 4213
  • Spring 2008

2
Why
  • Efficiency
  • Low in areas of low populations
  • Wasted herbicide
  • Decrease cost with higher efficiency
  • Population clusters
  • Areas with low or high densities
  • Areas with no weeds

3
What is Remote Sensing
  • Remote sensing is the science and art of
    obtaining information about a phenomenon without
    being in contact with it
  • Can be used to discriminate between weeds, crops,
    soil, and structures
  • Collection of quantitative data that can be used
    to make a recommendation

4
Possible Uses
  • Fallow systems / Between Rows
  • Non-selective
  • Most practical
  • Lower risk
  • Lowest cost
  • In Season systems
  • Selective
  • More complex
  • Site Specific

5
Terminology
  • Weed
  • Any plant growing in the wrong place at the wrong
    time and in the wrong quantity, or a plant whose
    virtues are not yet discovered.
  • Hyperspectral sensing
  • Data collected from contiguous bands usually by
    one sensor.
  • Spectral Vegitation Indices
  • Ratio of reflectances from various wavelengths
  • Multispectral sensing
  • Data collected from selected bands usually by
    multiple sensors

6
Hyperspectral Imagery
  • Contiguous wave length imagery
  • Identify plant species by reflectance
  • Reflectance at about 780 nm
  • Spearmint 65
  • Peppermint 60
  • Green foxtail 50
  • Waterhemp 35
  • Pigweed 25

7
Hyperspectral Imagery
  • Yellow Nutsedge

8
Hyperspectral Imagery
  • Pigweed

9
Hyperspectral Imagery
  • Dead Crabgrass

10
Multispectral Sensing
  • Uses selected bands
  • Can Identify weeds in citrus with an accuracy of
    about 99.07

11
Multispectral Sensing
Original red, green and blue image
Image with weed and non-weed classifications
Image with weed, citrus, tree, soil, and roof
classifications
Image with weed, vegetation and non-veg.
classifications
12
Non-selective
  • Only needs to identify between bare soil and a
    plant
  • Reduced herbicide usage
  • Reduce environmental risks
  • Reduced costs
  • Fallow systems
  • Between rows / hooded sprayer
  • Row crops
  • Orchards

13
Weedseeker / Spot Spray
  • Cost effective
  • Identifies chlorophyll
  • Automated

14
Sensor-controlled Field Spraying
  • Real time application
  • Possible use in cereals
  • Variable Rates
  • Reduced herbicide usage
  • Crop/weed discrimination

15
Sensor-controlled Field Spraying
  • Image analysis approach
  • CCD cameras
  • Image analysis software
  • Discriminate between crops and weed
  • Color
  • Shape
  • Texture

16
Sensor-controlled Field Spraying
  • Spectral reflectance approach
  • Optoelectronic weed sensor

17
References
  • http//www.ntechindustries.com/concept.html
  • http//www.agecon.purdue.edu/topfarmer/newsletter/
    TFCW05_2005.pdf
  • http//www.blackwell-synergy.com/doi/pdf/10.1111/j
    .1445-6664.2006.00236.x?cookieSet1
  • Dammer, Karl-Heinz and Wartenberg, G.
    Sensor- based wed detection and application of
    variable herbicide rates in real time. Crop
    Protection. Vol. 26, issue 3, March 2007, p.
    270-277. Weed Science in Real Time.

18
Questions?
About PowerShow.com