GardenBanter.co.uk - View Single Post

20-05-2003, 12:44 AM

(Beecrofter) wrote:

The plants don't know the difference between nitrogen synthesized from
natural gas and nitrogen from horse ****. The same applies to
phosphorus and potassium

This is not true. One would be much more acidic than the other. And
plants can't use the nitrogen in the air. Air is 80% nitrogen. So
where one nitrogen could help a plant, another could kill it and another
would just blow by. Most nitrogen fertilizers are ammonias or nitrates
or ammonia nitrates. Urea is related to ammonia but is slower acting
and usually preferred.

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