How to increase the color of apple after harvest

A: For fruits with poor natural coloring, artificial coloration can be done by selecting a dry, flat, well-ventilated place with 3 cm of fine sand or grass, with the top of the fruit up, the handle down, and the single-layer flat pendulum. On the surface of sand, the light is exposed during the daytime. From 9am to 4pm, the fruit surface is covered with a mat to prevent sunburn. After four days and nights, the fruit can reach the desired shade.

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