GRAINS Introduction Grains and cereal Classification - Cereal grains - Warm-season cereals Pseudocereal grains Pulses Oilseeds -Mustard family - Aster family Other families Ancient grains Historical importance Trade Occupational safety and health A grain is a small, hard, dry fruit ( caryopsis ) – 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 ( plantains , breadfruit , etc.) and tubers ( sweet potatoes ,...