In the middle stripe there is also a symbol of the Sun of May at the top and an plough surrounded by twenty-five golden stars at the bottom.

The plough symbolizes agriculture, which is the most important sector of the province's economy and is also found on the coat of arms.

[3] At that time the province did not have a flag, but its coat of arms was based on the shield of the Justicialist Party.

It was designed by graphic artist Jorge Esquivel and won an art contest.

The modern flag was approved on 19 September 2007, under Governor Roy Nikisch.