Dry farming in western Canada . dryfarminginwes00brac Year: 1921 WEEDS AND THE IK CONTROL 10. Mowing weeds on roads around fences and in waste places before seeds develop on them. 176. How to Kill Perennial Weeds.—Some of our perennial weeds arc the most difficult of all to control, while some are quite easily eradicated. The tap or fibrous rooted perenni- als can be killed by deep plowing and careful cov- ering of all vege- tation, followed by surface culti- v a t ion. The creeping - rooted ones are not so easily dealt with. One plow- ing is seldom sufficient to kill them and fre- quent
Dry farming in western Canada . dryfarminginwes00brac Year: 1921 WEEDS AND THE IK CONTROL 10. Mowing weeds on roads around fences and in waste places before seeds develop on them. 176. How to Kill Perennial Weeds.—Some of our perennial weeds arc the most difficult of all to control, while some are quite easily eradicated. The tap or fibrous rooted perenni- als can be killed by deep plowing and careful cov- ering of all vege- tation, followed by surface culti- v a t ion. The creeping - rooted ones are not so easily dealt with. One plow- ing is seldom sufficient to kill them and fre- quently several plowings do not succeed in doing so. Three of the common meth- ods employed in controlling the creeping-rooted peren- nials are as follow :— 1. Shallow plowing in the fall and deep plowing the next summer after the weeds have made a fresh start. The firsl plowing followed by the cold win- Fig. 78.—Blue Burr. A typical tap-rooted winter annual or biennial.
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