The Correlation. Correlation is a measue of how close the line fits the points that you found in your experiment. Anyone can say whether they think the line is a good fit or not, but to measure it exactly, we use the correlation coefficient: R2.
As the seasons change and the amount of sunlight decreases, less chlorophyll is produced, and the leaves appear less green. Chlorophyll is broken down into simpler compounds at a constant rate, so green leaf color will gradually fade as chlorophyll production slows or stops.
If your tree's leaves turn yellow before itâs time for seasonal color change, chlorosis may be the culprit. Chlorotic leaves lack sufficient amounts of chlorophyll, which is what gives them their green color. One method of correcting the problem is to inject iron chelate directly into trees, much like a botanical booster shot. Iron is an essential element for healthy plant growth and development because it helps form chlorophyll and influences plant metabolism and respiration.