A little more on Rothamsted Research and its wheat trial.
It’s a research facility founded in the 19th century. It’s a charity and a company. Its funding is laid out on its corporate information page.
Rothamsted Research is a grouping of private organisations and is one of seven institutes sponsored by the Biotechnology and Biological Sciences Research Council (BBSRC). Rothamsted Research is a charity and a company limited by guarantee and occupies land and buildings owned by the Lawes Agricultural Trust. The Rothamsted Research Association is an independent body that facilitates interaction and dialogue between researchers, especially those at Rothamsted, and practitioners in the agri-environment sector.
Sources of income as percentages for 2010/11 (total £29m) are shown in the figure below:
I hope that helps.