The usual commercial method of cultivating cucumbers involves the use of mineral (manufactured) fertiliser. However, a study in 2004 by the Department of Environmental Sciences at the University of Kuopio, in Finland (Helvi Heinonen-Tanski, Annalena Sjöblom, Helena Fabritius and Päivi Karinen) shows that pure human urine can be used as more than just a substitute; crop yields compared favorably, and taste and microorganism content did not appear to be negatively affected.
There did appear to be a slight smell when the urine was introduced, but this faded over time. (Source: Wikipedia)
Related posts you might find interesting too: