 By the 1800s, detailed descriptions of the underground silos were made by knowledgeable agricultural writers of Western Europe.They highlighted the airtightness as a major factor to maintain grain quality although some reports observed that some seeds lost germination power.Early researches with airtight storage were made from 1819 to 1830, where a French industrialist named Ternaux at Saint-Ouen stored grain in 9 series of experiment in large scale in general.