The dry matter (DM) content of each sample was determined by drying in an oven (Watvic, Watson Victor Ltd., New Zealand) to a constant weight at 105 °C [23]. The pH in the initial and the mix at the end of the 5 day fermentation period were measured at ten different points in the mix using a SevenEasy pH Meter (Mettler Toledo, GmbH, Schwerzenback, Switzerland).