Harry F. Clements 457 



TABLE II 

 Partial Regressions of Certain Factors on the Rate of Elongation 



(« = 1373) 



Factor 



Rate of leaf emergence 



Maximum temperature (°F.) 



Sheath moisture 



Minimum temperature (°F.) 



Total sugars 



Green weight of sheaths 



Age 



Soil moisture 



Leaf nitrogen 



Light 



Beta 



l t" Value 



exert negative influences. Radiant energy is not significant at this point. 

 In Table III a similar analysis of factors is reported dealing with the 

 green weight of the sheaths making up the sample. It should be re- 

 membered that this factor, while of no particular moment in itself, is 

 very closely correlated with the thickness of the stem and hence is asso- 

 ciated with an element of growth. 



TABLE III 

 Partial Regressions of Certain Factors on the Green Weight of Sheaths 



= r 373) 



Factor 



Sheath moisture 



Age 



Light 



Leaf nitrogen 



Soil moisture 



Maximum temperature (°F.) 



Rate of leaf emergence 



Total sugars 



Minimum temperature (°F.) 



Beta 



+ 

 + 



+ 



+ 



734 2 

 4612 



3616 



4558 

 1021 

 1184 

 0808 

 0501 

 0382 



"/" Value 



** 



** 



16.52 

 12.50 

 1 1 .42 

 10.61** 



4.06** 



3.86** 



1.97 



1 .67 



1 .26 



R= .8268 



