Powdery type: Also known as soft-grain type, the shape of the ear and kernels is similar to the hard-grain type, but the endosperm is entirely composed of powdery starch, and the kernels are milky white and dull. It is an excellent raw material for making starch and brewing. . Sweet type: Also known as sweet corn, it has short plants and small ears. The endosperm contains more sugar and water. When mature, the seeds shrink due to evaporation of water. Most of the seeds are horny endosperm, which is hard and translucent. It is often used as vegetables or canned. Sweet powder type: The upper part of the kernel is sweet horny endosperm, and the lower part is powdery endosperm, which is rare in the world.