This is a painting that shows a scenery of poppys and some trees in the background. He shows depth in this painting because you can see mountains and trees behind the flowers. I think he was trying to show the viewer that it was windy because he made the flowers and sky look as if they were moving in one direction.
“Auvers is very beautiful”, van Gogh wrote to his brother Theo in Paris, “among other things a lot of old thatched roofs, which are getting rare… really it is profoundly beautiful, it is the real country, characteristic and picturesque”. In 9 weeks, from late May through July 1890, Van Gogh produced some 106 finished works there – 72 paintings, 33 drawings and one etching. They represent the Auvers he saw around him and, more important, the place he imagined it to be: a perfected rural space that is fertile and green …
Van Gogh’s Poppy field dates from this period. Its composition... (https://thevincentvangoghart.wordpress.com/2013/04/18/poppy-field-june-1890/)