Fuente: WIPO "tomato" Culture soil for a leguminous plant including soil and dark-septate endophyte symbiotic fungus that includes at least one fungus selected from the group consisting of a fungus of the genus Cladophialophora, a fungus of the genus Exophiala, and a fungus of the genus Veronaeopsis, a cultivation set for a leguminous plant using the culture soil, a method for cultivating a leguminous plant, and a seedling of a leguminous plant with culture soil, as well as use of the culture soil for cultivation of a leguminous plant.