Figure 1

Average pH of urine for the 1st pair (A), 2^nd pair (B) and 3^rd pair (C) of cows during 4 periods of 10 days each. BR1 and BR2: Periods in which basic rations were fed with no supplements. ANIONS and STARCH: Periods in which basic ration feeding was supplemented per fistulam with anion salts and increasing amounts of barley, respectively. Figs. in brackets are mean values of all ten pH determinations of that particular graph. Initially (1^st pair) urine pH determinations were not done during the BR2 period.