. The American farmer's instructor, or, Practical agriculturist [microform] : comprehending the cultivation of plants, the husbandry of the domestic animals, and the economy of the farm, together with a variety of information which will be found important to the farmer. Agriculture; Pennsylvania imprints; Pennsylvania imprints; Pennsylvania imprints. 464 465 •«•.« WEEDS OF AGRICULTURE. The plants described in the preceding pages are those which form the subject of general cultivation. The weeds of agri- culture are those which grow amongst the cultivated plants and which it is the province and
. The American farmer's instructor, or, Practical agriculturist [microform] : comprehending the cultivation of plants, the husbandry of the domestic animals, and the economy of the farm, together with a variety of information which will be found important to the farmer. Agriculture; Pennsylvania imprints; Pennsylvania imprints; Pennsylvania imprints. 464 465 •«•.« WEEDS OF AGRICULTURE. The plants described in the preceding pages are those which form the subject of general cultivation. The weeds of agri- culture are those which grow amongst the cultivated plants and which it is the province and the duty of the farmer to destroy, and if possible to exterminate. The prevailing plants of this class vary in every country, and in different parts of the same country; and, indeed, the same observation may apply to the different counties.—Low. Weeds may be divided into two separate or general classes —those which propagate themselves by their seeds, and which, having once flowered, perish—and those which have perennial roots, and flower and bear seeds for successive years, like that vile pest, the Canada thistle. The first are annual or biennial, according as they require one or two years to complete the period of their vegetation. The second are perennial plants, and grow again from the roots, as well as propagate themselves from their seeds.—lb. In the case of annual or biennial weeds, if the stem is de- stroyed at the time of flowering, or just before it, the individual is destroyed, and its further means to propagate the species are taken away; but in the case of perennial weeds, the destruc- tion of the stem does not infer the destruction of the plant, because the plant has the power of propagation from the roots. From this distinction it would seem more easy to destroy an- nual than perennial weeds; yet this conclusion does not always hold, for some of the annual species have such numerous minute seeds, that it is often very difiicult to extirpate them; a
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Keywords: ., bookcentury1800, bookdecade1840, booksubj, booksubjectagriculture
