I think that it is called harvest musing because you want us to get wraped in our writing so that we can become better . It is called harvest musings because you want us to get wrapped up in what we do with our writing. As well as what we learn on a day to day basis. So that we are able to spend time and not let all of our time go to waste. So while your musing you are usually deep in thought about something or writing. This is why i think that it is called Harvest musing.