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Grower Diaries
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Entry Date
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Nick Name
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Thursday, July 04, 2019
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Matt D.
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Connecticut
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Entry 131 of 210 |
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Ever wonder how much light lower leaves get?
This demonstrates the importance to not have leaves on top of and shading other leaves simply because the amount of light energy those lower leaves receive is minimal. Here in the shade of a leaf the PAR reading is only 188 while in the sun the reading was 1464 so that means a shaded leaf is only receiving about 12% of the light energy that the top leaf is getting.
In addition to the lack of light there is also the increase chance of disease forming (particularly powdery mildew) so this is why it is important to prune out under growth and to properly train vines for an even canopy to maximize light absorption.
What does all of this PAR data mean? This is just to provide greater information into light intensity which is something most growers do not have a way to accurately measure or may not even consider.
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