| NL | Nero di Lomellina |
| CH | Commercial hybrid |
| HCC | Hair cortisol concentration |
| NH3 | Ammonia |
| CO2 | Carbon dioxide |
| N2O | Nitrous oxide |
| CH4 | Methane |
| H2S | Hydrogen sulfide |
| TNZ | Thermoneutral zone |
| THI | Temperature–humidity index |
| RH | Relative humidity |
| T | Temperature |
| LW | Live weight |
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