For row crops, vegetables, grass, most berries, shrubs and deciduous trees, vesicular-arbuscular mycorrhizal fungi (VAM) are the fungi of choice, while conifers and some late-successional deciduous trees require ectomycorrhizal fungi. Ericaceous plants, such as blueberries and rhododendrons, need Ericoid mycorrhizae. Earthfort tests for all three forms of mycorrhizal colonization.