Agriculture for beginners . - innumerous ways; theyshade the crop, stealits nourishment, andwaste its their only serv-ice is to make lazypeople till their crops. EXERCISE You should learn to know by name the twenty worst weeds of your \-i- cinitA and to recognize their seeds. If there are any weeds you are notFig. 6o. Canada Thistle ii ^ • j able to recognize, send a sample of each to your state experiment station. Make a collection, properl)^ labeled, of weeds and weed seeds for your SECTION XXI. SEED PURITY AND YITALITY Seeds produce plants. The difference between a
Agriculture for beginners . - innumerous ways; theyshade the crop, stealits nourishment, andwaste its their only serv-ice is to make lazypeople till their crops. EXERCISE You should learn to know by name the twenty worst weeds of your \-i- cinitA and to recognize their seeds. If there are any weeds you are notFig. 6o. Canada Thistle ii ^ • j able to recognize, send a sample of each to your state experiment station. Make a collection, properl)^ labeled, of weeds and weed seeds for your SECTION XXI. SEED PURITY AND YITALITY Seeds produce plants. The difference between a large anda small yield ma)^ depend upon the kind of plants we raise,and the kind of plant in turn is dependent upon the seedsthat we sow. Two things are important in the selection of seeds —purity and \-italit}\ Seeds should he pure; that is, when sown THE PLANT 73 they should produce no other plant than the one that we wishto raise. They should be able to grow. The ability of a seedto grow is termed its vitality. Good seed should be nearly orquite pure and should possess high vitality. The vitality ofseeds is expressed as a per cent; for example, if 97 seedsout of 100 germinate, or sprout, the vitality is said to be older the seed the less is its vitality, except in a fewrare instances in which seeds cannot germinate under twoor three years. Cucumber seeds may show 90 per cent vitality when theyare one year old, 75 per cent when two years old, and 70per cent when three years old — the per
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
