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Q. No.What percent of the incident solar radiation is photosynthetically active radiation (PAR)?
1. only about 1 to 5
2. only about 2 to 10
3. around but less than 50
4. 90 to 95
1. only about 1 to 5
2. only about 2 to 10
3. around but less than 50
4. 90 to 95
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