- 
  
  
        English colonists plant grain, potatoes, pumpkins and melons - 
  
  
        Indians teach Jamestown settlers how to grow corn - 
  
  
        George Washington breeds the first mules in the US - 
  
  
        Louisiana Purchase, a port for American farmers - 
  
  
        John Deere manufactures steel plow - 
  
  
        Sir John Laws founded the commercial fertilizer industry by developing a process for making superphosphate fertilizer - 
  
  
        Mason jars used for home canning - 
  
  
        Pasteurization invented - by Louis Pasteur - 
  
  
        Refrigerated railroad car patented - 
  
  
        Transcontinental railroad complete