TY CONF TI CONTENT OF FAT AND PROTEIN IN THE MILK OF BLACK-MOILED COWS DEPENDING ON LINEAR ASSIGNMENT KW milk KW fat KW protein KW lines KW cows JO XIII All-Russian scientific-practical conference of young scientists «Achievements and prospects of development of the Russian agriculture", dedicated to the memory of R.G. Gareev AU Shvechihina, T.. PY 2023 PB TRIA FRC Kazan Scientific Center of RAS