[Objective] The study aimed to provide basis for the selection, defending and management of plantation. [Method] The soil samples were collected from different depths of wasteland with thin grass, plantation and natural forestland in Ji'an and Yingtan cities and the microorganism quantity in soil was determined by dilution plate method. [Result] The bacteria number in 0~10 cm soil layer was lower than that in 10~20 cm soil layer in natural forestland, the microorganism quantity and species reduced along wit...