| 2007 NAICS | 2012 NAICS | 2017 NAICS | Corresponding Index Entries | |||
| 111998 | 111998 | 111998 | Agave farming | |||
| 111998 | 111998 | 111998 | Alfalfa seed farming | |||
| 111998 | 111998 | 111998 | Aloe farming | |||
| 111998 | 111998 | 111998 | Amaranth farming | |||
| 111998 | 111998 | 111998 | Bentgrass seed farming | |||
| 111998 | 111998 | 111998 | Bluegrass-Kentucky seed farming | |||
| 111998 | 111998 | 111998 | Chicory farming | |||
| 111998 | 111998 | 111998 | Clover seed farming | |||
| 111998 | 111998 | 111998 | Crimson cloves seed farming | |||
| 111998 | 111998 | 111998 | Fescue seed farming | |||
| 111998 | 111998 | 111998 | General combination crop farming (except fruit and nut combinations, oilseed and grain, vegetable) | |||
| 111998 | 111998 | 111998 | Grass seed farming | |||
| 111998 | 111998 | 111998 | Guar farming | |||
| 111998 | 111998 | 111998 | Hay seed farming | |||
| 111998 | 111998 | 111998 | Herb farming, open field | |||
| 111998 | 111998 | 111998 | Hop farming | |||
| 111998 | 111998 | 111998 | Jojoba farming | |||
| 111998 | 111998 | 111998 | Kenaf farming | |||
| 111998 | 111998 | 111998 | Maple sap concentrating (i.e., producing pure maple syrup in the field) | |||
| 111998 | 111998 | 111998 | Maple sap gathering | |||
| 111998 | 111998 | 111998 | Maple syrup (i.e., maple sap reducing) | |||
| 111998 | 111998 | 111998 | Marijuana, grown in an open field | |||
| 111998 | 111998 | 111998 | Mint farming | |||
| 111998 | 111998 | 111998 | Orchard grass seed farming | |||
| 111998 | 111998 | 111998 | Ryegrass seed farming | |||
| 111998 | 111998 | 111998 | Sorghum sudan seed farming | |||
| 111998 | 111998 | 111998 | Spice farming | |||
| 111998 | 111998 | 111998 | Syrup, pure maple (i.e., maple syrup reducing) | |||
| 111998 | 111998 | 111998 | Tea farming |