EXERCISE No. 64 

 MOISTURE REQUIRED FOR GERMINATION 



Object: To learn how much moisture seeds require for 

 germination. 



Material: Wheat, corn, beans, and sunflower seeds; 

 tumblers or jelly glasses with covers, sand, and saw-dust. 



Method: Take four glasses. Fill each one-third full of 

 sand ' or saw-dust. Leave one dry and make the others 

 respectively, moist, very moist, and saturated. Plant 

 three seeds of each of the different kinds in each glass. Set 

 all in a dry place and cover to prevent drying. 



Conclusion: With what degree of moisture do these 

 particular seeds germinate best? 



EXERCISE No. 65 

 EFFECT OF TEMPERATURE ON GERMINATION 



Object: To learn the temperature at which seeds germi- 

 nate best. 



Material : Corn, oats, peas, and squash seeds; glasses and 

 saw-dust. 



Method : Plant several seeds of each kind in moist saw- 

 dust in each of the several glasses. Set one in a very warm 

 place, one in an ice box, and the others in places with inter- 

 mediate temperatures. Have other conditions so far as 

 possible the same. Examine each every other day for a week. 



Conclusion: What temperatures do you find best for 

 germination? 



Do seeds vary in this respect? 



100 



