每日吃瓜

Tropfrog wrote: I do bellieve that amonium nitrate is the most common form of nitrogen source in inorganic fertilizer. I also bellieve that this is a very unusual chemical compound in organic fertilizers.

Of course. That is the form in which plants can take up nitrogen.

All organic compounds needs decomposition by bacteria or fungi to create these forms of nitrogen. Which is why they assist in maintaining a healthy rootzone: More diversity in organisms builds a more stable structure. And feeding mycchoriza makes for more resilient plants.