NCSU Horticulture Substrates Lab
 
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Calculations

Total Porosity = [(Wet weight - Dry weight + Drainage) / 347.5] X 100

Water Holding Capacity = [(Wet weight - Dry weight) / 347.5] X 100

Air Space = (Total Porosity - Container Capacity) = (Drainage / 347.5) X 100

Bulk density = (dry weight / core volume)

  • Db (g/cc) = Dry weight / 347.5
  • Db (lbs/cu ft) = (Dry weight / 347.5) X 62.427961

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Maintained by Bill Fonteno


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