Show Canada Thistle Worst Weed Veed in Iowa va State Dr L. L II IL Painted of the tho Iowa lown experiment experiment ex ex- 1 station considers Canada thistle the worst weed in his state stat For this weed and others similar to It Doctor recommends deep I. I plowing harrowing with a spring sprIn I Ir r tooth harrow and then raking and I burning the roots Next ext he says to smooth the ground round with a n disc and harrow once a week weel until freezing weather More harrowing can be bedone bedone bedone done In the spring until time to put In the following crops which should preferably be a n heavy smothering crop like e sudan grass or sorghum I 1 |