English: The tomato plants on the left were fertilised with urine, collected at an office building in Germany. The right tomato plants were not fertilised. The difference between both is clear: the fertilised plants were growing fast, strong and constant. The unfertilised plants were not growing constant, strong and fast (highest about 40 cm). One of the plants did not survive, the second is growing slow and weak and the third is growing in an normal mode (about 30 cm), but not that fast and strong like the fertilised plants.

In order to see the effect of urine fertilization more clearly, we used very nutrient-poor soil: it is a 20/80 mixture of sand and of clay granules (to hold moisture).

The pictures were taken on 10.06.2009 by P. Feiereisen.