NARA released the 1950 population census schedules for researcher use on April 1, 2022, at https://1950census.archives.gov.  This is the 62nd in a series of blog posts on the 1950 census. 

You may have noticed there are a lot of half-empty pages in the 1950 census records, such as the page shown below on which enumerator Vernon W. Garner recorded one family and 11 vacant houses in Enumeration District 5-2, St. Leonard, Calvert County, Maryland.

Why did the enumerators do this?  What a waste of paper!  Don't leap to that conclusion too quickly.  There was a valid reason for leaving blank lines.  This is it:  The reverse side of the census form contained the housing schedule, which only had space for information about 12 dwellings (houses or apartment buildings).  Therefore, once the enumerator recorded information about persons (if any) in 12 buildings on the population side, the enumerator had to stop using that census sheet and start a new one.

Sheet 56, ED 5-2, Calvert County, Maryland - A Mostly Empty Census Sheet
Sheet 56, ED 5-2, Calvert County, Maryland - A Mostly Empty Census Sheet

As a reminder, the housing side of the 1950 census form was not microfilmed by the Census Bureau back in 1952, and no longer exists, as explained  in 1950 Census:  From Paper to Microfilm Publication T628.  Housing statistics are available on the Census Bureau website at https://www.census.gov/programs-surveys/decennial-census/decade/decennial-publications.1950.html and include information down to the block level for 213 municipalities.  For more information, see 1950 Census Block Housing Information Is Available For 213 Municipalities