A practical course in botany : with especial reference to its bearings on agriculture, economics, and sanitation . ut another batch of seeds;raise to the boiling point for ten minutes more, and plant the remain-ing six of each lot. Number the four germinators, and observe at in-tervals of twenty-four hours for two weeks. The harder kinds should bekept under observation for three or four weeks, as they germinate slowly. Try the same experiments with the same kinds of seeds at a dry heat,using a double boiler to prevent scorching, and record observations as before. Experiment 31. Time required f
A practical course in botany : with especial reference to its bearings on agriculture, economics, and sanitation . ut another batch of seeds;raise to the boiling point for ten minutes more, and plant the remain-ing six of each lot. Number the four germinators, and observe at in-tervals of twenty-four hours for two weeks. The harder kinds should bekept under observation for three or four weeks, as they germinate slowly. Try the same experiments with the same kinds of seeds at a dry heat,using a double boiler to prevent scorching, and record observations as before. Experiment 31. Time required for germination. — Arrange ingerminators seeds of various kinds, such as corn, wheat, peas, turnip, apple,orange, grape, castor bean, etc. Clip some of the harder ones and keepall the kinds experimented with under similar conditions as to moisture,temperature, (^tc, and record the time required for each to sprout. Whatis the effect of clijiping, and why ? Experiment 32. Are very young or immature seeds capable ofGERMINATING ? — Plant some seeds from half-grown tomatoes, and grains GERMINATION AND GROWTH 37. of wheat, oats, or barley before they are ready for harvesting. Try asmany kinds as you like, and see how many will come up. Notice whetherthere is any difference in the health and vigor of plants raised from seedsin different stages of maturity. Experiment 33. The relative value of perfect and inferiorSEED. — From a number of seeds of the same species select half a dozen ofthe largest, heaviest,and most perfect, andan equal number ofsmall, inferior ones. Ifa pair of scales is athand, the different setsshould be weighed anda record kept for com-parison with the seed-lings at the end of theexperiment. Plant thetwo sets in pots con-taining exactly thesame kind of soil, andkeep under identicalconditions as to light,temperature, andmoisture. Keep theseedlings under obser-vation for two or threeweeks, making dailynotes and occasionaldrawings of the heightand size of the stem
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