James Adkins, Extension Engineer, adkins@udel.edu, Jarrod Miller, Extension Agronomist
In 2023, the University of Delaware evaluated the corn yield response to 14 biological products at 3 nitrogen fertility levels (optimum, 80%, and 50% rate). While some of the products claimed to provide nitrogen fixation others were designed to improve plant health and root structure. Products tested include:
Invigorate (AMVAC) | Ion Strike (Planet Earth Agronomy) |
Zypro (Helena) | BioGrowth (Willard Ag) |
UtrishaP (Corteva) | Source (Sound Ag) |
ProveN40 (Pivot Bio) | Blaine (Farmer 2 Farmer) |
Accomplish Max (Loveland) | Blaine with humic (Farmer 2 Farmer) |
RioZyme Supreme (Schaeffer’s) | Nexia (Innvictis) |
RioZyme Plus (Schaeffer’s) | Launch (Ag Concepts) |