Ecompost
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we can fix P or rather we can move it from a fixed pool not available in to a soluble pool, some bacteria and mostly fungus perform this task by secreting organic acids which dissolve the calphos in to P and Ca2 for example.
We can use them to get access to organic material, such as lignin, breaking this down in to plant ready P or K, so we can make use of fallen leaves, and matter which breaks down in to plant ready NPK. They can convert the bodies of dead insects, animal waste and plant waste, back in to forms which the next plant can benefit from if not an existing plant.
bacteria only fix atmospheric N under certain conditions and only NO3- nitrate forms, this conversion taking place at a higher pH than most MJ growers are used too. Low pH values will prevent the conversion and so we tend to find more NH4+ nitrogen in more acidic soils.
As a rule, when Azospirillum lipoferum is added to the soil, it multiplies in millions and can supply 20-40 kg of nitrogen per hectare per season.
All the things we need to grow plants are already present in healthy soil, we should not need too much added NPK, rather we need to learn how to better access the plentiful PK that already exists
