H-2A Improvement Act

H-2A Improvement Act - Amends the Immigration and Nationality Act to include within the H-2A nonimmigrant visa category (temporary agricultural workers) an alien coming temporarily to the United States to work as a sheepherder, goat herder, or dairy worker. Exempts an employer filing a petition to employ such a worker from the requirement to show that the position is of a seasonal or temporary nature.

Provides for a three-year initial period of admission with additional three-year extensions.

Authorizes such alien to petition to become a lawful permanent resident after having worked as a sheepherder, goat herder, or dairy worker in the United States for not fewer than 33 of the preceding 36 months.