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Page 807 - ... sold, offered or exposed for sale within this State, shall have affixed thereto, in a conspicuous place on the outside thereof, a legible and...
Page 807 - ... or material sampled, the name of the party from whose stock the sample was drawn, and the time and place of...
Page 797 - This act being deemed of immediate importance shall take effect and be in force from and after its publication in the Register and Leader and the Des Moines Capital, newspapers published in Des Moines, Iowa.
Page 807 - ... number of packages which shall not be less than five per cent of the whole lot inspected, and shall be thoroughly mixed and...
Page 704 - US Dept. of Agr.) have apparently become strongly aggressive under changed conditions. These are some of the instances which may show that predominance is not in consequence of change of country and introduction to new soil. In the interesting paper of Claypole the author argues that the abundance of European weeds in North America is because European plants are more plastic than American plants. He says : But a weed possessing a plastic nature — one capable of being...
Page 14 - ... second and third glumes, the latter having sometimes a hyaline palea in its axil; floral glume elliptical, subacute, smooth and shining, a little shorter than the larger outer glumes; anthers saffron yellow.
Page 18 - It is not generally recognized, but it is probably true, that more money is spent in the extermination of foxtails than of any other class of weeds we have in the state of Iowa, yet they are all easily destroyed. One of the best and most effective methods of destroying the foxtail is by plowing the small grain field as soon as the grain is removed. If this is not done a large amount of seed is produced. After this plowing in the fall the field should be disked and harrowed in the spring and then...
Page 622 - Accompanying this maturing of the ovule, various other changes take place which give distinguishing features to different seeds. Frequently the endosperm grows so extensively as to absorb and replace the cells of the nucellus and thus comes to occupy all the space within the coats of the integuments, as in the morning-glory, onion, etc. The embryo may remain comparatively small as in the morning-glory or onion, or it may in turn absorb and replace all the cells of the endosperm and so come to occupy...
Page 399 - ... brought under conditions favorable for germination at intervals for several years. Mature plants should be mowed and burned before plowing. The seed appears as an impurity in clover, millet and the heavier grass seeds, and the plant is doubtless most frequently introduced by this means. As the seeds may be carried a long distance by the wind, the plants must be cleared out of the fence rows, waste land and roadsides.
Page 805 - Russian thistles, wild lettuce or wild mustard are growing on any lands in their township, and are about to spread or mature seed between the first day of June and the fifteenth day of October of each year, said trustees shall cause notice in writing to be served upon the...

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