Soybeans, like other legumes, have the unique ability to form a symbiotic relationship with nitrogen-fixing bacteria, primarily Bradyrhizobium japonicum, colonize the plant's roots and help form nodules that turn atmospheric nitrogen (N₂) into ammonium (NH₄⁺), a form plants can use to grow and thrive.
This adding of Bradyrhizobium inoculant is a natural nitrogen-boosting process which is especially important in nitrogen-poor soils like those found in Western Canada where native Bradyrhizobium levels are low or even non-existent.