In Vienna, consultants, organic farmers and green-minded consumers have developed a new concept of urban organic farming, called Selbsternte (`self-harvest'). Organic farmers prepare a plot of arable land (the Selbsternte plot) and sow or plant rows composed of 18±23 plant species. In mid-May the plots are divided into subplots that contain 2±6 m of every sown species and are rented to so-calle...