Wherever there are farms there has to be some type of structure to keep equipment and supplies dry. Here are a few images of those types of structures from some places I have been.
Rural Kenya
Shirikawa-go, Japan
Shandong Province, China
Builiding for storing equipment and supplies for the agricultural geenhouses in Shouguang, Shandong Province, China. 
Small building to support the farm in Shandong Province, taken from a train window. 
Builiding for storing equipment and supplies for the agricultural geenhouses in Shouguang, Shandong Province, China.
Norborne, Missouri, USA
Old barn in Norborne Missouri, USA. 
Modern barn in Norborne, Missouri, USA.
Yakima Valley in Washington State, USA
For Tatiana of Travelways new photo challenge: Thursday Travel-Barns