Rhizodeposition
In a study conducted on Triticum Sp. (Spelt Wheat) it was found that the Spelt Wheat was more productive in the presence of microorganisms that make up the rhizosphere than the Spelt Wheat that contained minimal microorganisms (the study notes that it is hard to maintain sterile soil). Specifically, wheat benefiting from rhizodeposition was able to grow higher faster and develop a root system that went wider and deeper. Harvest size from wheat with microorganisms was also much larger compared to wheat without/lacking microorganisms.