This research was carried out as part of the project “singular
estratégico PROBIOGAS PSS-120000-2008-58”: sub-project 3 Agronomical
evaluation of digestates, funded by the Spanish Ministry
of Science and Innovation and EU through FEDER Funds “una manera
de hacer Europa”. The authors thank all the research groups
involved in the project PROBIOGAS (http://www.probiogas.es) as
well as the Treatments of Juneda Society (Tracjusa) for providing
the digestate used in this work. The authors also thank Dr. D.J.
Walker for revision of the written English.