Answer:
The land was white the seed was black it'll take a good scholar to riddle me that. What is it?
Without a bridle, or a saddle, across a thing I ride a-straddle. And those I ride, by help of me, though almost blind, are made to see.
If I have it, I don't share it. If I share it, I don't have it. What is it?
I'm white, I'm round, but not always around. Sometimes you see me, sometimes you don't.
As I walked along the path I saw something with four fingers and one thumb, but it was not flesh, fish, bone or fowl.
The warmer I am the fresher I am.