Archive image from page 140 of Cyclopedia of farm crops . Cyclopedia of farm crops : a popular survey of crops and crop-making methods in the United States and Canada cyclopediaoffarm00bailuoft Year: 1922, c1907 Fig. 137. stick-tight or beggar-tick {Bidens frondosa). Fig. 136. Ragweed {Ainbrosia arteinisicv folia). mine why he is possessed of certain weeds: this discovered, he can then proceed to treat the question rationally. There are, of course, special methods for certain weeds and cer- ± tain conditions. Summer- fallowing is a means of cleaning fields of weeds, but it is usually nece
Archive image from page 140 of Cyclopedia of farm crops . Cyclopedia of farm crops : a popular survey of crops and crop-making methods in the United States and Canada cyclopediaoffarm00bailuoft Year: 1922, c1907 Fig. 137. stick-tight or beggar-tick {Bidens frondosa). Fig. 136. Ragweed {Ainbrosia arteinisicv folia). mine why he is possessed of certain weeds: this discovered, he can then proceed to treat the question rationally. There are, of course, special methods for certain weeds and cer- ± tain conditions. Summer- fallowing is a means of cleaning fields of weeds, but it is usually necessary for this purpose only in new lands or those that have been improperly handled. Pasturing with sheep is an- other special method. Spray- ing with poisons will despatch some kinds of weeds. Mowing at certain times of the year will dispense with others. Burning the fields is often useful. In meadows and lawns, it is often possible to eliminate weeds by fertilizing and re-seeding the invaded parts, for usually the weeds do not run out the grass, but the weeds invade because the sod is poor. In the contest with weeds, the farmer should dis- tinguish the kinds as to duration. It is obviously one problem to deal with perennials and another problem to deal with annuals. In the annuals, it is necessary only to prevent seeding, so far as dissemi- nation or persistence is concerned. In perennials, it
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