id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
afs-71684	Kossila, Vappu; Hintikka, Onerva	Effect of age and stage of lactation on the simple and partial correlations between the yield and the percentages of fat and protein of cow’s milk	1967	10	.pdf	application/pdf	5327	292	71	It may be possible that since the first-calvers continue to grow during their first period of lactation, the amino-acids circulating in their blood are intensively taken up by growing body tissues and this process may compete with the synthesis of milk protein in the mammary gland. The correlations between these two milk constituents vary greatly in individual cows (Kliesch et al. 1959) and are affected by age (Piel 1953, Marckmann & Witt 1956) and breed (Gaines & Over- man 1938) of the cows, the season of the year (Kiermeier & Renner 1961, Peltola et ai. 1963), the season of calving and the level of milk yield (Marckmann & Witt 1956), the stage of lactation (Peltola et ai. 1963) as well as by genetic factors (Bonnier & Hansson 1946, Hansson & Bonnier 1949).	cache/afs-71684.pdf	txt/afs-71684.txt