. Annual report of the Missouri State Board of Agriculture. Missouri. State Board of Agriculture; Agriculture -- Missouri. Testing Farm Seeds. 377 the kinds given in the following list affords strong indication of domestic production. The weed seeds especially suggestive of European production include: (Fig. 19) chickweed (q), forked catchfly (t); (fig. 20) creeping buttercup (a), bird's-foot trefoil (g), wild geraniums (h, i and j), red pimpernel (o), forget- me-not (q), vervain (r); (fig. 21) rough-leaved toadflax (c), held madder (g), wild corn salad (i and j), scentless camomile (o), hawkw
. Annual report of the Missouri State Board of Agriculture. Missouri. State Board of Agriculture; Agriculture -- Missouri. Testing Farm Seeds. 377 the kinds given in the following list affords strong indication of domestic production. The weed seeds especially suggestive of European production include: (Fig. 19) chickweed (q), forked catchfly (t); (fig. 20) creeping buttercup (a), bird's-foot trefoil (g), wild geraniums (h, i and j), red pimpernel (o), forget- me-not (q), vervain (r); (fig. 21) rough-leaved toadflax (c), held madder (g), wild corn salad (i and j), scentless camomile (o), hawkweed picris (s). The presence of white seeds of crimson clover is an additional indication of Euro- pean production. TESTING ALFALFA SEED. Alfalfa seed is distinguishable from the clover seeds by the some- what variable kidney-shaped form of individual seeds (figs. 2, 4, 5, 6 and 26) and by the greenish-yellow or light-brown color. Old, poorly de- veloped and shriveled seeds have a dull, reddish-brown color. In general the details of testing red clover seed (p. 33) may be followed in testing alfalfa. Alfalfa seed is adulter- ated by the use of (1) yel- low trefoil (figs. 4 and 23), (2) sweet clover (figs. 5 and 27), (3) bur clover (fig. 6), (4) light, shriv- eled alfalfa screenings or low-grade, weedy seed. Besides giving especial attention to the matter of adulteration, the question of domestic or of Europe- an production should be considered in making the purity test. Much of the seed on the market is imported, and the question of domestic or for- eign production often can be determined by the weed seeds present. The purity should attain 98 or 99 per cent, the viability 97 to 99 per cent. The germination test should be completed in six days, most of the seeds sprouting during the second and third days. Considerable hard seed is often found in new seed. The noxious weed seeds found in alfalfa seed include: (Fig. 17) sand bur (a), wild oat (b), chess (c), quack-grass (e), dock (
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