# op\_data3

| Operation | Use of variable |
| --------- | --------------- |
| pcom      |                 |
| plnt      |                 |
| harv      |                 |
| hvkl      |                 |
| kill      |                 |
| mons      |                 |
| till      |                 |
| irrm      |                 |
| irra      |                 |
| fert      |                 |
| frta      |                 |
| frtc      |                 |
| pest      |                 |
| pstc      |                 |
| graz      |                 |
| burn      |                 |
| swep      |                 |
| prtp      |                 |
| skip      |                 |