Peasant imagery and especially that of the 'Sower' was something that Van Gogh turned to numerous times throughout his career.
His affiliation with this subject was partly as a response to the work of the romantic Realists such as Millet, and a reflection of his own socialist ideals.
The sower in particular was a figure that Van Gogh saw in terms of representing the eternal cycle of agricultural life, of honorable endeavor and tradition, and symbolized these qualities to the artist.