Remote Sensing and Crop Phenology
The graph below shows some common sensors and the images produced by these sensors. These sensors can receive much broader ranges of EM waves.
The textbook definition of phenology goes as: "Phenology is the study of timing of biological events and their relationship to seasonal climatic changes" -US/IBP Phenology Committee (1972)
You can think of phenology as the color change of the plants. Take a look at the graph below which is showing the color change of soybeans from July to November.
Monitoring crop phenology has many implications: things like understanding the growing cycle of the crops, predicting the yield of the crops over large areas
We can get key phenological stages of the crops through studying crop phenology
Traditional phenology studies rely on field observation, however, the involvement of remote sensing can observe the phenology of crops in large areas and thus making the observation more efficient