RICHERT, A.; GENSCH, R.; JOENSSON, H.; STENSTROEM, T.A.; DAGERSKOG, L. (2010): Practical Guidance on the Use of Urine in Crop Production. Stockholm: Stockholm Environment Institute (SEI). URL [Accessed: 20.07.2010]. PDF
This practical guideline on the use of urine in agricultural productions gives some background information on basic plant requirements and how they can be met with urine as a liquid fertiliser.