Answer:
A harvest sown and reaped on the same day in an unplowed field. Which increases without growing, remains whole though it is eaten within and without. Is useless and yet the staple of nations.
A time when they're green. A time when they're brown. But both of these times, cause me to frown. But just in between, for a very short while. They're perfect and yellow. And cause me to smile.
My life can be measured in hours, I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
It is the assumed nocturnal symbol of Mr. Wayne. What is it?
Used on a diamond and left on a board. It's great for a gymnast his grip to restore. What is it?
I have two eyes in the front and a lot of eyes on my tail