It depends on the use. For mulch, straw is probably better since it carries less possibility of plant disease and may carry fewer weed seeds. For feed use for organic dairy production, hay is a much higher quality feed since straw has virtually no nutritive value.
to eat hay. to sleep on straw or a mixture of both hay and straw
Straw is better because it does not contain may seeds. Hay contains seed and cause weeds to grow in your freshly planted grass.
Straw is usually preferred to prevent weeds, as hay often contains the seeds of the very plants you're trying to prevent.
Hay has nutritive value; straw does not.
the difference between hay and straw is that horses eat hay and straw is a bedding.
Straw
Straw is hay and hay is grown. There were large acres of hay grown.
Whatever organic material is available. Chickens will use straw, wood chips, hay, dry leaves or shredded paper to nest with. If nothing else is available they will lay without nesting materials.
Because straw is harder than hay and straw will get stuck in the digestive system because it is too thik.
The difference between hay and straw as mulch lies in straw being cleaner and having fewer seeds in general and fewer weed seeds in particular.
hay is a greenish color is usually for eating, but straw which is thicker and has a yellowish color is used for bedding since it has less nutrients. hay straw
Hay is dried grass or legumes (like alfalfa). Straw is the dried stalks of harvested cereals, such as wheat, barley, and oats.