How did you guess? 
I don't want nitrogen-based fertilisers, crop spraying, etc either. 
We only have excess amounts of those fertilisers thanks to the intense factory farming of animals anyway.
*sigh*
no, we have excess amounts of those fertilisers because all living things need nitrogen to survive. it makes up the good part of our DNA and proteins (remember that nitrogen groups are called 'amine' groups in chemistry and proteins are made up of polymers of
amino acids) - and really we are all water and protein in the end.
we need to receive it from plants, and plants need to receive it from the soil.
plants can't use atmospheric oxygen, because it is unreactive, and the only living things that produce oxygen are bacteria (eg; rhizobium) in symbiosis with other organisms. these don't produce enough of it to sustain the amount of food we need to grow for the human population currently on earth.
either you go GM, you use nitrogen fertilisers, or you go hungry.
