METEOROLOGY – OLAR RADIATION CALCULATOR
Photosynthetically Active Rad
A precise tool.
What is the Photosynthetically Active Rad & How does it work?
Photosynthetically Active Radiation (PAR) is the spectral range of light from the sun that plants can use in photosynthesis. It is typically defined as radiation with wavelengths between 400 and 700 nanometers.
The amount of PAR received by a plant depends on various factors including the angle of incidence, atmospheric conditions, and time of day. Understanding PAR is crucial for optimizing crop growth in controlled environments or outdoor agriculture.
PAR = int_{400}^{700} G(lambda) dlambda
G(lambda) = Global radiation at wavelength (lambda)
Parameters
Result
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Frequently Asked Questions
What is Photosynthetically Active Radiation (PAR)?
Photosynthetically Active Radiation (PAR) is the portion of sunlight that plants use for photosynthesis, typically ranging from 400 to 700 nanometers.
How does PAR affect crop growth?
PAR directly influences plant growth by providing the energy needed for photosynthesis. Higher levels of PAR generally lead to better and faster growth rates.
What factors can influence the amount of PAR received by plants?
Factors such as the angle of sunlight, atmospheric conditions like cloud cover, and time of day can all affect the amount of PAR received by plants.
How is PAR measured?
PAR is typically measured using a quantum sensor that detects the intensity of light within the 400 to 700 nanometer range.
Why is understanding PAR important for agriculture?
Understanding PAR helps in optimizing crop growth by ensuring plants receive the right amount of light, which is crucial for photosynthesis and overall plant health.
Results are for informational purposes only and do not constitute professional advice.