Volume V APIilL, 1919 Nos. 3 and 4 



PHYSIOLOGICAL PRE-DETEPvMINATION: THE 

 INFLUENCE OF TR^ PHYSIOLOGICAL CONDI- 

 TION OF THE SEED UPON THE COUPvSE OF 

 SUBSEQUENT GPvOWTH AND UPON THE YIELD. 



III. REVIEW OF LITERATURE. CHAPTER 11. 



By franklin KIDD, M.A. (Cantab.), D.Sc. (Lond.), 

 Fellow of Si John's College, Cambridge, 



AND 



CYRIL WEST, A.R.C.Sc, D.Sc. (Lond.), F.L.S. 

 {Imperial College of Science and Technology.) 



PAGE 



Chapter II. Influence of the Degree of Maturity of the Seed at 



the Time of Harvesting upon its "Potentiality" 157 



Introduction . 157 



The "Potentiality" of the Seed as influenced by the 



Time of Harvesting 158 



The "Potentiality" of the Seed as influenced by the 



Weather Conditions at the Time of Harvesting . 168 



Conclusions ........ 168 



CHAPTER II 



IKFLUENCE OF THE DEGREE OF MATURITY OF THE SEED 

 AT THE TIME OF HARVESTING UPON ITS "POTENTIALITY." 



Inteoduction. 

 In the previous chapter we have reviewed the literature dealing with 

 the effect of parental conditions upon the "potentiality" of the seed, 

 meaning by this not only the capacity of the seed for germination, but also 

 the capacity of the resulting plant for growth and yield. In the present 

 chapter we shall consider the influence of the degree of maturity of the 

 seed at the time of harvesting upon the vigour and yield of the result- 

 ing plant. 



Different degrees of maturity of the seed are determined (1) by har- 

 vesting the seed at a time prior to that of the natural shedding of the 

 Ann. Biol, v 11 



