Flush-free fertilizer

Scientists have found a new use for human urine — as a potent crop fertilizer.

By Emily Sohn, 00:00 AM October 5, 2007

Most urine ends up in the toilet, as it should. But the garden may be another appropriate place to send human pee, according to scientists in Finland. The yellow liquid appears to help cabbages grow.

 

Researchers from the University of Kuopio grew cabbages under three conditions. For the first group of plants, they added conventional fertilizer to the soil. They treated a second group of cabbages with human urine that had been stored for 6 months. They let the third group grow without any soil...

Source URL: https://student.societyforscience.org/article/flush-free-fertilizer