Always a sad day, final harvest of the #Mars #moon experiment. Main result adding #struvite from #human #urine as manure works very well @wur @WURplant @WURenvironment @AmandaGTeach @SciGeekJulie @govertschilling @martiansoil @TheMarsSociety pic.twitter.com/hJNqBJ8u2U
— Wieger Wamelink (@wamelink_wieger) February 25, 2020