How did government actions reflect conservative business interests in the 1920s

Laissez-faire economics and tariffs--the 1920s presidents supported a hands-off approach to the economy and taxes on imported goods. 

Conservatives believe the government should not regulate the economy and allow it to grow as needed. They were more pro-business than worker, limited support for unions. Tariffs were passed in the 1920s to promote American business instead of foreign imports. 

The answer is crop yield.