PROBLEM TO BE SOLVED: To provide vegetation soil which can basically grow and maintain afforestation plants only with rain without using a spray installation and a drain installation. SOLUTION: This vegetation soil 100 is characterized by comprising at least a water-reserving function layer 102 formed on a base bed 101 and containing Wakkanai layer diatomaceous shale A crushed in desired sizes, and a general soil layer 103 formed in the upper layer of the water-reserving functional layer 102. COPYRIGHT: (C)2007,JPO&INPIT