Changes

The earliest written records of hop cultivation come from 8th and 9th century A.D. from the Hallertau district in [[Germany]], now famous for their Hallertau Mittelfruh hop variety.  The earliest actual brewing records explicitly noting the addition of hops come from 14th century Germany.

The earliest written records of hop cultivation come from 8th and 9th century A.D. from the Hallertau district in [[Germany]], now famous for their Hallertau Mittelfruh hop variety.  The earliest actual brewing records explicitly noting the addition of hops come from 14th century Germany.

Although there are [[microorganisms]] that can spoil beer, such as [[lactobacillus]], there are no known human [[pathogens]] than can live in beer.{{fact}} This is commonly thought to be due to the alcohol in the beer, however it is actually due to the [[pH]]; typically in the range of 4.0 to 4.4.{{fact}}

Although there are [[microorganisms]] that can spoil beer, such as [[lactobacillus]], there are no known human [[pathogens]] than can live in beer. This is commonly thought to be due to the alcohol in the beer, however it is actually due to the [[pH]]; typically in the range of 4.0 to 4.4. <ref>[http://www2.parc.com/emdl/members/apte/text.pdf Matadero Creek Brewery]</ref> <ref>[http://mi.water.usgs.gov/h2oqual/GWBactHOWeb.html U.S. Department of the Interior | U.S. Geological Survey]</ref>

==Categories==

==Categories==

==References==

==References==

==External Links==

==External Links==

*[http://www.coopsmaps.com/beer/hops.html Coops Maps - A short history of hops]

*[http://www.coopsmaps.com/beer/hops.html Coops Maps - A short history of hops]