Hello, Charles from American Life 365. In this video I would like to do a case study of this dying orange tree. What causes yellow leaves and how to save it from dying.
Look at this orange tree, the leaves are turning yellow, even the stems are turning yellow. She issued a distress signal. How to interpret it? First, we must know why the leaves turn yellow. The reason for the green color is that the leaves contain a substance called chlorophyll. Chlorophyll absorbs sunlight other than green. Chlorophyll reflects green light. So one can see green leaves. When there is less chlorophyll, the leaves become less green or yellow. So the reason for less chlorophyll is the reason why the leaves turn yellow.
What causes a decrease in chlorophyll? The first cause is a lack of nutrients such as nitrogen, iron, zinc and magnesium, iron or zinc and magnesium in photosynthesis. The second reason is that the light is not enough, The third reason is water is not enough or too much water leads to rotten roots. The first is nitrogen deficiency. Nitrogen deficiency is most likely to cause low chlorophyll. Usually if nitrogen is deficient, it means that the soil must contain less nitrogen or be alkaline. Nitrogen generally means more acid, and nitrogen deficiency means soil is less acidic and tends to be more alkaline. However, it showed a little acidic. Ideal soil pH for citrus citrus trees, including lemons (Citrus limon), oranges (Citrus sinensis) and grapefruit (Citrus x paradisi), ranges from slightly acidic 6.0 to alkaline 8.0. Therefore, it must be a little too acid is not nitrogen deficiency. Iron or zinc and magnesium are immovable nutrients and it should show older leaves greener than older leaves because immovable minerals cannot move to new leaves. It should at least make the veil greener. Because the new leaves that are the upper leaves are almost the same color as the other leaves. It shows possible mineral deficiencies. May be deficient in iron and zinc.
Next. Let's look at light. The area faces south. It gets at least 6 hours of full sun. So orange trees have plenty of light
Then we look at moisture. We found it was too wet.
