Questions tagged [nitrogen]

An essential element required by all life

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24
votes
3answers
4k views

Do legumes provide nitrogen to their companions?

It's common knowledge that legumes (clover, beans, etc) can (with the help of Rhizobium bacteria) fix nitrogen from the air and hold it in the soil. Much is made of this fact -- advice that we should ...
18
votes
1answer
47k views

Which plants/trees will benefit from using urine as a fertilizer?

We know that urine can do a plant good. Certain plants (like citrus trees) will absolutely do well if you add urine to their intake. But urine is very high in nitrogen and could potentially "burn&...
14
votes
8answers
16k views

Is spent cat litter an appropriate source of nitrogen for compost?

Is spent cat litter an appropriate source of nitrogen for compost? The cat litter used is made of recycled paper pellets so is rich in carbon. It doesn't contain the cat faeces because that is fished ...
4
votes
2answers
162 views

I need nitrogen-poor soil. Where can I buy some (US)?

I am a student doing a science fair project relating to nitrogen content in plants. For some trials, I will need nitrogen-poor soil. Can anyone point me in the correct direction? And if you have used ...