If your iPhone 15 screen appears yellow, it may be due to the "Night Shift" function being enabled. To correct this, make sure to turn off or adjust the time setting to improve the color. If these methods fail, it is advisable to contact Apple customer support or visit an authorized repair center for further assistance.
As for rural farming and apple tree yellowing, the main cause is a lack of essential nutrients, such as iron, in the soil. To address this issue, it is necessary to start with the soil and root system. It is recommended to use "Methyl Diphenyl Triazole" (MDT) solution for disinfection, with the specific formula customized according to the number of apple trees planted. Fertilizing with manure in spring is a good start.
Furthermore, in early spring, when fertilizing, base fertilizer and other fertilizers should be combined. This is crucial because apples require nutrients and water throughout the year. It is important to supply them accordingly. Additionally, it is recommended to spray "Sulfuric Acid Solution" at the initial stage of yellowing disease, and to use "Iron Solution" medicines available in pharmacies as needed.
This is the main reason for apple tree yellowing and the treatment and management methods in their regular conditions. Apple trees are inherently difficult to manage, so their own growth needs a solid foundation.