Gastric cancer is the third most common cause of cancer-related death in the world, and it remains difficult to cure in Western countries, primarily because most patients present with advanced disease. In the United States, stomach malignancy is currently the 15th most common cancer.
The condition of the tendrils near the fruit stem is another indicator of when a watermelon is ready to pick. When they are green at the attachment point, the fruit is not yet ripe, but when they start to turn brown and dry, it is harvest time.
The surface of the watermelon goes from shiny to dull. The side of the melon that rests on the soil will turn from green to yellow. It should have a symmetrical body shape and the underbelly of it should be the color of a buttery yellow. When you knock on it with your knuckles it should give off a dull, hollow sound.