3 ms·
In the USA we used to just spray sludge, but that's largely been banned. A shame because it works really well and scales with population.
by User23 3y ago
In the USA we used to just spray sludge, but that's largely been banned. A shame because it works really well and scales with population.
- stainablesteel 3y agowhy was this banned?
- icegreentea2 3y agoYou're spreading (often) human waste over a field. There are a lot more pathogen risks this way.
- bluGill 3y agoOnly if it isn't treated carefully. Spray it on in fall after harvest and you are probably fine. however spray right before harvest and pathogens will still be alive. a month before harvest is often when plants need the most nutrients, and that isn't enough time for any pathogens to die.
- isilofi 3y agoSome pathogens simply do not die in any useful timeframe, e.g. anthrax or tetanus. Those lurk in the soil for years, decades and even centuries. The only safe measure is heat-treatment, but that is usually too expensive. In particular, it is more expensive than just using artificial fertilizer.
- bequanna 3y agoAre you talking about fertilizing with human waste?
- pkaye 3y agoWhat about Milorganite? Its the sludge from treated waste water that is heated to kill pathogens. https://en.wikipedia.org/wiki/Milorganite https://en.wikipedia.org/wiki/Milorganite