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Comment by metalman

3 days ago

"Hungria" cant have a better name for food research. Nitrogen fixing is one of the more frustrating things to work on as there is such a massive ready supply of unfixed nitrogen to work with everywhere on our planet and all in all we need such a tiny proportion to dramiticly improve agriculture.The whole thing is so finly balanced that herbivors can likely smell the diference in plants that have been given nitrogen fertiliser and raid our crops and gardens for the fixed nitrogen that then facilitates there own internal bacteria and thereby achive better nutrition for themselves. But to my frustration and anger, nothing eats alder bushes, which are a never ending problem in taking over fields, but when after employing machinery to uproot them,( it bieng the only way to kill them), reveals there bright orange knobly roots, that host the nitrogen fixing bacteria that they contain. There is enough nitrogen and other nutrients in alder that the area's where they are piled and burnt will remain significantly more fertile for many years after. One of my(many) projects is to experiment with "terra preta" and build a charcoal kiln, primarily for alder and hopefully be able to retain a greater portion of the "good stuff™" that is otherwise lost to rotting or combustion.

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metalman

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IAmBroom  3 days ago

> There is enough nitrogen and other nutrients in alder that the area's where they are piled and burnt will remain significantly more fertile for many years after.

My experience with burn areas is that the potash alone will do this. Are you sure that the nitrogen is what's surviving? It could be - sodium nitrate has a fairly high combustion temp of ~300C - but even then it's being boosted by the concentrated potassium left over.

  • metalman  3 days ago

    That gives me a target temp for building a regenerative bio char kiln * , Thanks!

    * in a regenerative kiln, volotiles are captured and fed to a burner to provide the bulk of the heat needed to char organic materials, the chared materials can do double duty as soil amendments and long term carbon storage or as fuel for a variety of uses. Also the volotiles can be condenced as liquids that have a wide variety of other uses. What would be interesting is if there might be a way to use an enhanced combustion process to capture extra atmospheric nitrogen in the bio char materials.