This standard specifies the investigation methods for tobacco agronomic traits and growth period. This standard applies to all cultivated tobacco in my country, namely Nicotiana tabacum niger and Nicotiana tabacum niger.
YC/T 142-1998 history
2010YC/T 142-2010 Investigating and measuring methods of agronomical character of tobacco
1998YC/T 142-1998 Investigating methods of agronomical character of tobacco