How was wheatfield with crows by vincent van gogh significant to history?

It was open to interpretation and presented many different ideas. It also had many metaphorical and deeper messages - the path, the crows etc. It was also one of his last paintings so is very important and a famous art piece that has many hidden meanings. It creates a great sense of emotion and feelings and allows viewers to perceive certain ideas - is very famous in the history of art. Very simplistic painting with many levels. Created a redeemed sense of depth to painting.

The techniques and paints used also hint at a specific time period so enable people to determine a rough time it was made and represents other paintings from that time that can be compared to his painting, to determine time and resources occurring in that time period. 

Dramatic movement i think

Would it be an oboe?