I used to use a nitrogen fertilizer made from municipal waste processing - "Milorganite". I stopped before moving to my current place, which is on old plum orchard land and before that, forest. In Texas, there are concerns about the biosolids product, "Granulite". https://www.wastedive.com/news/fort-worth-synagro-contract-termination-biosolids/743697/ https://kiowacountypress.net/content/north-texas-county-sues-feds-over-pfas-contamination Also in several other states. Biosolids are promoted as "green", "natural" "eco-friendly". Recently I read about biosolids use on farm land. Biosolids are municipal waste, processed. It seems like a big movement, promoted as "environmentally friendly". In both cases, these are not simple to understand. Municipal waste contains toxic minerals and toxic chemicals. It's a form of pollution, intentionally spread on farm land and gardens. https://en.wikipedia.org/wiki/Milorganite It's not a small outfit - "As of May 2019, 9.9 billionpounds (4.5 megatonnes) of waste have been diverted away from landfills. The resulting production is among the largest recycling programs in the world." https://www.msn.com/en-us/news/us/r...fertilizer-some-neighbors-hate-it/ar-AA1BHjcG It can be lead, cadmium, arsenic, mercury, PFAs ("Forever chemicals"), PCBs, drugs, pharmaceuticals, and other materials. I have not read about pesticides and herbicides, which can be in commercial landscaping-derived composts for gardens and sometimes kill garden plants (it has happened to me, including in a bag of "Miracle-Gro" potting soil). My dogs at the time loved Milorganite. It's really stinky and dogs just love "stinky". Supposedly it will deter deer, but I don't know about that. I'm not expert. There are lots of articles, and no one can read all of them. I stay away from these products.