I am trying to find data on wages in the Agriculture sector of Kandiyohi Minnesota on foreign and native born workers from years 1990 through 2014
The small population of Kandiyohi County, MN prevents it from being identified in the microdata resources. However, NHGIS provides Census tables for the 2005-2009 5-year sample of income by place of birth at the county level, as well as for each year from 2009 to 2014. Tables also exist that report income by industry at the county level. Unfortunately, it does not appear that these tables exist prior to the 2009 5-year sample, and it does not appear that tables exist for income classified by both place of birth and industry. I encourage you to further investigate the tables available through NHGIS. While NHGIS is primarily focused on mapping data, the summary tables can be extracted independent of shape files as .csv files with optional descriptive headers.
Hope this helps.