Which EM bands are typically used in precision agriculture applications?

Which EM bands are typically used in precision agriculture applications?

• A. Visible and near infrared
• B. Ultraviolet
• C. Microwave
• D. Infrared

Answer: (B)

In precision agriculture, vegetation health and vigor are tracked using how plants reflect light in the visible and near-infrared parts of the spectrum. Chlorophyll absorbs blue and red light, while healthy leaves reflect more in the near-infrared, giving strong, interpretable signals that help distinguish stressed from healthy vegetation. This combination—visible plus near-infrared—provides the clearest contrast for assessing biomass, chlorophyll content, and stress across fields, which is why it’s the typical and most useful set of bands for crop monitoring. Ultraviolet isn’t favored because it carries less information about plant health and is more affected by atmospheric scattering, making signals unreliable for standard crop monitoring. Microwave sensing focuses more on soil moisture and structural properties rather than direct vegetation vigor in the common field-scale assessments. Infrared does play a role in thermal imaging for water stress, but for the primary monitoring of plant health via reflectance signals, visible and near-infrared are the go-to bands.

In precision agriculture, vegetation health and vigor are tracked using how plants reflect light in the visible and near-infrared parts of the spectrum. Chlorophyll absorbs blue and red light, while healthy leaves reflect more in the near-infrared, giving strong, interpretable signals that help distinguish stressed from healthy vegetation. This combination—visible plus near-infrared—provides the clearest contrast for assessing biomass, chlorophyll content, and stress across fields, which is why it’s the typical and most useful set of bands for crop monitoring.

Ultraviolet isn’t favored because it carries less information about plant health and is more affected by atmospheric scattering, making signals unreliable for standard crop monitoring. Microwave sensing focuses more on soil moisture and structural properties rather than direct vegetation vigor in the common field-scale assessments. Infrared does play a role in thermal imaging for water stress, but for the primary monitoring of plant health via reflectance signals, visible and near-infrared are the go-to bands.