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9. Use it in compost and fertilizer.
Manure is well known as a fertilizer, but it turns out that there are uses for urine in gardening, too. Urine contains loads of nitrogen, which is crucial for plants and usually a main component of commercial fertilizers. After observing local farmers who frequently peed on their crops and conducting a study published in Scientia Horticulturae, researchers in Nepal found that pepper plants grown in soil containing a mix of human urine and compost grew the tallest and yielded the most peppers. And researchers in Finland found that tomato plants fertilized with urine and wood ash yielded almost four times the number of tomatoes of those that weren’t fertilized.