Annual Report of the Indiana State Board of Agriculture Yr. 1883
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The moisture? Is this all? To determine these points we must perform some more experiments. Let us take several pots filled with good rich soil and plant half a dozen apparently sound seeds in each. These we will water carefully, but keep at a temperature a little above freezing. No plants come up. Repeat the experiment, keeping the second pots at a higher tem- perature, say 60°, and we shall find in a few days the young plants peering above the surface. Let us try some other pots, prepared and... treated like the last, except that no moisture is supplied. Again we fail to grow any plants. Let us see whether the soil has any influence. To do this we shall procure some clean sand, heat it red hot and wash it in acid to jemuve every trace of soluble nourishing matter. In sand so cleansed the seeds grow as well as in soil. One more experi- ment. Plant the seed as before and treat as well as you know how, but in some way take out and keep out all air from contact with the seeds. Again you fa.l to get any plants.
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