. Textbook of pastoral and agricultural botany, for the study of the injurious and useful plants of country and farm. buckhorn, red-stemmed plantain, cow cockle,slender wheat-frass, prostrate pig^^eed, common ragweed, sedge, largemouse-eared chickweed, fetid marigold, barnyard grass, gumweed, pepper-grass, witch grass, spotted smartweed, five-finger, curled dock, pigeon-grass, and buffalo bur. There were 188 different kinds of weed seeds occurring as impuritiesin crop seeds. The analyses show the following most common impurities of the im-portant crop seeds sold in Colorado. Alfalfa.—Indian mu
. Textbook of pastoral and agricultural botany, for the study of the injurious and useful plants of country and farm. buckhorn, red-stemmed plantain, cow cockle,slender wheat-frass, prostrate pig^^eed, common ragweed, sedge, largemouse-eared chickweed, fetid marigold, barnyard grass, gumweed, pepper-grass, witch grass, spotted smartweed, five-finger, curled dock, pigeon-grass, and buffalo bur. There were 188 different kinds of weed seeds occurring as impuritiesin crop seeds. The analyses show the following most common impurities of the im-portant crop seeds sold in Colorado. Alfalfa.—Indian mustard, dodders, prostrate pigweed, tall pigweed,lambs quarters, barnyard-grass, sunflower, gumweed, sweet clover,witch-grass, curled dock, Russian thistle, and green foxtail (Figs. 113 and114). AGRICULTURAL SEEDS, SELECTION AXD TESTING 263 Barley.—Wild oats, black bindweed or wild buckwheat, and —Peppergrass, sour sorrel, chickweed, and — Russian thistle. Millet.—Tall pigweed, ragweed, lambs quarters, sunflower, Russianthistle, smartweed, green foxtail, yellow Fig. ii3.^Alfalfa of good quality. Natural size and magnified 9 times. {AfterBrown, Edgar and Crosby, Mamie L.:Imported Low-grade Clover and Alfalfa Ill, Part III. Bureau of Plant Industry. 1907).
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Keywords: ., book, bookcentury1900, bookdecade1920, booksubjectpoisonousplants
