This is a fairly comrehensie frass fertilisation study with aplication rates of 2.5% and 5%. Unfortunately frass this rate it too high, most cases recommend an application rate of under 2% to avoid nitrite build-up. However, there are some powerful insights. BSFL produces a frass that can be appied at higher rates without nitrification issues. Frass promotes fungal growth and it can ammend heavy metal contamination.
Frass: Heavy metal treatment
Full article
https://www.sciencedirect.com/science/article/pii/S0929139321002328?via%3Dihub
Reference
(Watson, et al. 2021)
Watson, C., Schlösser, C., Vögerl, J., & Wichern, F. (2021). Excellent excrement? Frass impacts on a soil’s microbial community, processes and metal bioavailability. Applied Soil Ecology : A Section of Agriculture, Ecosystems & Environment, 168, 104110-. https://doi.org/10.1016/j.apsoil.2021.104110
This article is open source, so hopefully I haven't made any IP infringements.
