Answer:
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk
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.
You need a key to receive an answer from me. The answer you'll find is straight from your mind. What is it?
What stays the same size no matter how much they weight?
The land was white the seed was black it'll take a good scholar to riddle me that. What is it?
It's what light turns into in the night