The McCree Curve represents the average photosynthetic response of plants to light energy. The McCree Curve, also known as the Plant Sensitivity Curve, begins at 360nm and extends to 760nm. This curve can be placed over a spectral distribution chart to see how well a light source can affect plant growth.
Please Note - Also, these experiments were conducted using small leaf samples of 22 food crop plant species and therefore do not reflect the response of a whole plant or of all plant species. Finally the curve represents photons that have been absorbed, not photons emitted from a light source.
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