| [relationship between placental weight and the weight of sheep and of lambs at birth]. | in 1972--1973 a study was carried out on the sheep flock at the barley at institute, karnobat, to establish the correlation between the weight of placenta and the weight of ewes at impregnation and at giving birth, on the one hand, and the correlation between the weight of placenta and the weight of lambs at birth, on the other hand. the influence of the age of ewes on the weight of placenta was also followed up. studies were organized with two breed groups of sheep--the newly developed ewe for ... | 1977 | 607556 |