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MONITORING OF CROP PHYSIOLOGY USING REMOTE SENSING METHODS
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CROP PHYSIOLOGY
CHAPTER 1
- BACKGROUND OF THE STUDY
Remote sensing is the process of obtaining information about objects without coming into direct contact with the object. The carrier of information in remote sensing is electromagnetic radiation, which travels in vacuum at the speed of light in the form of waves of different lengths. The most useful wavelengths in remote sensing cover visible light (VIS),
and extends through the near (NIR) and shortwave (SWIR) infrared, to thermal infrared (TIR) and microwave bands. Passive remote sensing sensors record incident radiation reflected or emitted from the objects while active sensors emit their own radiation, which
interacts with the target to be investigated and returns to the measuring instrument
Remote sensing can be divided into three categories: ground-based, airborne and satellite. when evaluating a remote sensing platform, spatial and spectral resolution must also be taken into account. The spatial resolution defines the pixel size of satellite or airborne images covering the earth surface and relates to the dimensions of the smallest object that can be recognized on the ground. A sensor’s spectral resolution indicates the width of spectral bands in which the sensor can collect reflected radiance. According to Jackson (1986) handheld remote sensing instruments are very useful for small-scale operational field monitoring of biotic and abiotic stress agents. This technology has better temporal, spectral, and spatial resolutions in comparison to airborne and satellite remote sensing. A limiting factor of handheld remote sensing is one of efficiency and often time reduced to evaluating small areas when compared with aircraft and satellite mounted sensors, which can be used to be used to evaluate much larger areas at a time. Forecasting yield, nutritional requirements of plants, detection of pest damage, water demands and weed control are the most commonly undertaken problems in studies making use of opportunities of field spectrometers in agriculture.
- STATEMENT OF THE PROBLEM
The challenges associated with monitoring of crop physiology, Forecasting yield, nutritional requirements of plants, detection of pest damage, water demands and weed control constitute the essence for the use of remote sensing methods. Remote sensing is the process of obtaining information about objects without coming into direct contact with the object. The carrier of information in remote sensing is electromagnetic radiation, which travels in vacuum at the speed of light in the form of waves of different lengths. The most useful wavelengths in remote sensing cover visible light (VIS),
and extends through the near (NIR) and shortwave (SWIR) infrared, to thermal infrared (TIR) and microwave bands. Passive remote sensing sensors record incident radiation reflected or emitted from the objects while active sensors emit their own radiation, which
interacts with the target to be investigated and returns to the measuring instrument. Consequently the problem confronting the study is to appraise the monitoring of crop physiology using remote sensing methods
- OBJECTIVE OF THE STUDY
The main objective of the study is to appraise the monitoring of crop physiology using remote sensing methods
- SIGNIFICANCE OF THE STUDY
The study shall proffer solution to the challenges confronting the monitoring of crop physiology, Forecasting yield, nutritional requirements of plants, detection of pest damage, water demands and weed control constitute the essence for the use of remote sensing methods.
- SCOPE OF THE STUDY
The study proffers an appraisal on the monitoring of crop physiology using remote sensing methods
- LIMITATION OF THE STUDY
The study was confronted with logistics and geographical constraint
- DEFINITION OF TERMS
REMOTE SENSING DEFINED
Remote sensing is the process of obtaining information about objects without coming into direct contact with the object. The carrier of information in remote sensing is electromagnetic radiation, which travels in vacuum at the speed of light in the form of waves of different lengths.
