What does par measure?

Related questions

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Tags

1. #range
2. #seasonally
3. #photosynthesis
4. #photosynthetically
5. #available
6. #which
7. #active
8. #wavelength
9. #latitude
10. #amount
11. #varies
12. #light
13. #nanometer
14. #radiation
15. #changes
16. #depending