Ceremony performed to the gods in the hope of a prosperous growing season.

This is the Aztecs, but many others do it too.

Raindance

Explanation:

The answers that are included with this question are:

travois raindance corral nomadic sundance

One of the ceremonies that exist among Native groups and that is intended to ensure a prosperous growing season is that of a raindance. Rainmaking is a ritual that many groups engage in. In the United States, this is most common in Southwestern aeas, among groups such as the Zuni, Osage and Quapaw. The rain is intended to modify the weather so that rain falls and the crops succeed. These ceremonies are often highly symbolic and elaborate.