Of the total incident solar radiation the proportion of PAR is:A. Less than 50 %B. More than 80 %C. About 70 %D. About 60 %.

Of the total incident solar radiation the proportion of PAR is:A. Less

1.	Of the total incident solar radiation the proportion of PAR is:A. Less than 50 %B. More than 80 %C. About 70 %D. About 60 %.
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Of the total incident solar radiation the proportion of PAR is:A. Less than 50 %B. More than 80 %C. About 70 %D. About 60 %.

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