passages.id: split_5_test_1835_passage
passages.type: progene_text
passages.text: In Exp. 1 , nursery pigs ( n = 14 ) were fed ( for a period of 7 d ) either a standard nursery diet or the same diet supplemented with 1 % adipic acid to assess effects on urinary pH ( collected on d 5 or 6 ) and in vitro ammonia emission from the collected urine samples that were mixed with control feces .