Jan 15, 2008

High End Science, Nitrogen Fixation

Diazotrophs are scattered across bacterial taxonomic groups (mostly in the Eubacteria but also a couple of Archaea). Even within a species that can fix nitrogen there may be strains that do not fix nitrogen (Postgate, 1998). Fixation is shut off when other sources of nitrogen are available*, and, for many species, when oxygen is at high partial pressure.** From Wikipedia

*So if fixation is shut of by the bacteria if N is present at some level, then at what level do you not need N fixing plants?
If my soil test comes back with high or high enough N, are N fixing plants a waste? This would be good to know in a Polyculture Design.
** N fixing is an anaerobic process. hmmmmm.

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Permaculture and Polyculture Consulting and Design

Permaculture and Polyculture Consulting and Design
Getting to know your property, the plants you have and those you can grow, is a fulfilling endeavor. With most I am the steward of the land. I give them good soil biology and they do the rest. If I group them in cohesive plant communities, they respond with greater yields. If I encourage the micro-organisms (Fungus and bacteria) , the roots obsorb more nutrients making a pest and disease resistant plant. A stronger plant that gives us more organic food and takes less energy.

A Ten Acre Farm Transformed to an Edible Forest Garden

A Ten Acre Farm Transformed to an Edible Forest Garden
Self Renewing Fertility, Soil Building, Water Catchment, Tea Trail Swale, Erosion Control and Native American Medicinals