I can also look for more information if this isn't the "AT1-9(2)" you meant. sja_v_18_i_1_2020.pdf - SAARC Agriculture Centre
Within this age group, multiple morphological variables show strong significance ( ) in relation to body weight. AT1-9(2)
If you can tell me the context of where you found this, I can tell you if it's about: I can also look for more information if
Variables that are highly correlated with weight in 1.9–2-year-old sheep include: Heart Girth (HG) Width of Hip (WH) Radius (RD) Rhomboid Height (RH) Body Length (BL) Applications AT1-9(2)