Field experiments compared different types of corn in dry conditions. They used a drought resistance index to measure how well each type of corn handled drought. The results showed that corn yields were lower in drought conditions, with longer time between flowering and silk production, shorter plants and ears, fewer grains per ear, and lighter grains. The time between flowering and silk production, and how green the plants stayed, were closely related to how well the corn handled drought. By looking at these factors, they could identify corn varieties that were better at resisting drought.