OPTIONS:
a). As soon as the grass looks stable to you, turn your tractor off and detach the taproot from the drive-through. Once you get the tractor off, slowly break it up again and start proceeding again.
b). If you're right-handed, try to plow in a straight line toward the center of your lawn. If you're left-handed, do the opposite.
c). Clean up your yard as soon as possible. After harvest, wash the area with soap and water, removing as much manure and vegetation as possible.
d). Till your soil a few times per week. You should till the soil of crops where johnson grass grows more frequently than other areas.Choose from options above and answer: What most naturally follows?

How to control johnson grass
Plow immediately after you harvest.
Johnson grass has rhizomes that allow the weed to spread into uninfected areas. If you plow your fields immediately after you harvest your crops, it breaks up the rhizomes and prevents them from getting a good hold and then spreading to other areas.
Answer:
d).