10. Make soiling crops a prominent feature in certain fields.
11. Smother weeds with quick growing and thickly seeded crops, like red clover or rye or buckwheat.
12. Keep some crops growing on the land from early spring till late autumn,—double cropping, i. e., two cultivated crops in one year for barn and cellar instead of one for use and one of weeds.
13. Cultivate thoroughly after a crop is removed.
14. Clean up and avoid leaving any vacant or out of the way places for breeding ground.
15. Where practicable, remove fences and cultivate to the gutters of the highway.
16. Keep some sheep.
17. When once begun, continue the work thoroughly from year to year, giving no quarter to weeds. This is the easiest in the long run and the royal way.
18. Where hand labor is employed, it is far less expensive and much easier to keep weeds down by raking or hoeing once a week than by going over the ground much less frequently.
The habits of a weed determine to a great extent the best mode of fighting it. Certain remedies suggest themselves for creeping perennials, like quack grass and toad flax, while different treatment is best for narrow-leaved dock; and still a different mode of attack may be adopted for crab grass and purslane.