同时大规模的农地泡沫也非常罕见：在20世纪的美国仅仅发生过一次，那是在1970年代人们恐慌人口过度暴增的时期。
And large-scale farmland bubbles are quite rare: there was only one in the US in the entire twentieth century, during the great population scare of the 1970’s.