1. A tree with weak trees, small buds, and small yellow leaves. This kind of tree has weak drought resistance, and in the case of continuous high temperature and drought, vegetative growth is rare and reproductive growth is excessive.
2. Trees with small leaves, thin leaves, long stop, and no secondary growth. This type of tree has a large causal consumption, but it lacks water in the ground and cannot maintain normal nutrient exchange and affect leaf function.
3. The results of the previous year were many, and the nutritional losses were excessive. There were not many fruits in the whole year, but the leaves were yellow and the trees had fallen leaves. This type of tree will recover when the rain is normal. However, in the case of drought-stricken soil water shortage, nutrition cannot be transmitted normally, and the tree potential recovery is difficult, causing the yellowing of the leaves.
4. Trees with obvious water shortage at the edge of the ditch.
5. Strip the excess tree. After the fruit tree is stripped, the water transported by the soil is lacking, and the upper and lower nutrient exchanges are seriously affected. If the air is hot and dry, it will affect the healing of the peeling.
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