SEED GERMINATION 



67 



Put one end of the glass with the blotter and rows of 

 seeds in place into one end of the pan and let it sink be- 

 neath the water, while the other end extends out beyond 

 the other end of the pan. If any of the seeds float off 

 when you place the end of the glass in water, put them 

 back into place with your fingers. One end of each row 

 will now be under water while the other end will be out 

 in the air. Keep the water at the same height in the pan 

 each day. A few drops of formalin in the water will help 

 to keep molds from destroying your seeds. 



Conclusions. — Copy the following table into your note- 

 book, and fill it out by taking notes the first, the second, 

 and the third days, and after this every third day for two 

 or more weeks, or until you are able to fill in the second 

 column with certainty for all the seeds : 



Review Exercises 4, 5, 6, 8 and 9, and tell again clearly 

 how drainage, manuring, surface cultivation and rotation 

 of crops will help to get the proper amount of moisture 

 to the planted seed. 



48. Temperature and Germination. — It has been 

 rather easy for us to show that a seed must have oxygen 

 and moisture before it will germinate. It is not so easy 

 to prove at just what temperature a seed germinates best 



