This articlte gets technical and delves into explaining why application rates of frass over 2% stunt growth - its nitrification.
Frass: The Nitrification Issue
Full article
https://www.frontiersin.org/journals/sustainable-food-systems/articles/10.3389/fsufs.2021.721840/full
Reference
(Watson, PreiBing & Wichen, 2021)
Watson, C., Preißing, T., & Wichern, F. (2021). Plant Nitrogen Uptake From Insect Frass Is Affected by the Nitrification Rate as Revealed by Urease and Nitrification Inhibitors. Frontiers in Sustainable Food Systems, 5. https://doi.org/10.3389/fsufs.2021.721840
This article is open source, so hopefully I haven't made any IP infringements.
