A grain is a small, hard, dry fruit  with or without an attached hull layer  harvested for human or animal consumption. A grain crop is a grain-producing plant. The two main types of commercial grain crops are cereals and legumes. After being harvested, dry grains are more durable than other staple foods, such as starchy fruits  and tubers.

A grain is a small, hard, dry fruit  with or without an attached hull layer  harvested for human or animal consumption. A grain crop is a grain-producing plant. The two main types of commercial grain crops are cereals and legumes. After being harvested, dry grains are more durable than other staple foods, such as starchy fruits  and tubers.