Select a cion and root stick of about equal diameters. Cut both 

 the stock and the cion across diagonally, so that the cut surface 

 will be from one to two inches in length. Make a vertical slit in 

 each cut surface and- press the tongue of the cion into the cleft 

 of the stock. See Fig. 7. After fitting cion and root stock to- 

 gether so that the cambium layer_of one coincides with the cam- 

 bium layer of the other, wrat, the graft together with a bandage 

 and apply grafting wax * over it. What do you infer to be the 

 purpose of the grafting wax? 



Part E. Propagation by Seeds. 



12. A seed is nothing more than a young plant or embryo, 

 with a supply of food either in the embryo or surrounding it, all 

 enclosed in the seed coat. The reserve food material is formed 

 and stored in the seed by the parent plant to give the young plant 

 a start in life. Plant various seeds, such as oats, corn, beans, 

 alfalfa, radishes, and beets, in separate flower pots. Make a record 

 of the work and its results in the following form: 



Fig. 7. Diagram illustrating 

 steps in root grafting. 



Date of Planting. 



13. Make a summary of the various ways in which plants are propagated or reproduced. 

 You may include in this summary what you have learned of the reproduction of moulds, yeasts 

 and bacteria. 



# Note. Directions for the preparation of a grafting wax are given in Part C of Exercise XXXVI. 



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