. Horticulture; a text book for high schools and normals. Gardening; Vegetable gardening; Fruit-culture. 348 CONTROL OF WEEDS bulbs that will grow in any position are also difficult to get rid of by a limited amount of tillage. Thorough and frequent cultivation however, will destroy weeds of this type. Weed Dissemination.—All three classes of weeds bear seeds and are spread by this method for long distances. Weeds that form their seeds in burs, such as burdock, cockle bur, sand bur, bidens, Spanish needles and others are often carried on the coats of animals for long distances. They literally
. Horticulture; a text book for high schools and normals. Gardening; Vegetable gardening; Fruit-culture. 348 CONTROL OF WEEDS bulbs that will grow in any position are also difficult to get rid of by a limited amount of tillage. Thorough and frequent cultivation however, will destroy weeds of this type. Weed Dissemination.—All three classes of weeds bear seeds and are spread by this method for long distances. Weeds that form their seeds in burs, such as burdock, cockle bur, sand bur, bidens, Spanish needles and others are often carried on the coats of animals for long distances. They literally catch rides to their new homes. Tickle grass, tumble weed, and a few others of that type F10- 2i5- spread by the whole body car- rying seeds, rolling in the wind for miles and miles. Occasionally these are carried high in the air, but usually are found rolling on the ground. Many seeds, such as. Fig. 244.—Purslane; entire plant. (Minnesota Station.) Fig. 245.—Buckhorn Plantain; 1, entire plant; 3, seedling; 4, seed enlarged. Station.) (Minnesota milkweed, dandelion, thistle and others may be carried by strong wind to distant places. Still others, such as the dock and wild carrot, may be blown somewhat by the wind and will also float upon water, where they are carried by either waves or cur- rents to new fields. Many perennial weeds have other means of spreading than by seeds. The underground stems, runners, etc., will spread weeds. Some of the worst grasses, Canada thistle, sheep sorrel, toad flax and many more are thus spread. Frequently such seeds are. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Davis, Kary Cadmus, 1867-. Philadelphia, London, J. B. Lippincott Co
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Keywords: ., bookcentury1900, booksubjectfruitculture, booksubjectgardening
