The mycorrhizal symbiosis is well known, but not yet in widespread use in the com- mercial nursery trade. The often-cited mycorrhizal growth response is in not the most signi cant mycorrhizal effect. Instead, the important effects are performance in the eld and improved nutrition and disease resistance in the nursery. These bene ts may be of use in meeting regulatory requirements related to fertilizer runoff and pesticide use. A nursery mycorrhiza program requires modi cation of some current practices and careful choice of appropriate fungi.
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