Soil
Great soil is the basis of a productive garden. "Living" soil is full of microbes, organic matter, earthworms and other wigglers. It will grow large amounts of food in small spaces. Soil that is a fully functioning system will not require expensive fertilizers or pesticides. For an in-depth discussion of what makes up living soil, check out the link below.
      
  
  
                 Soil Amendment Guide            Enriching Your Soil