Table II. 

 GENEEAL SUMMAEY. 



Potash 



Phosphoric Acid. 



Nitrogen 



Drake Field. 



Fertilization-. 



With- 

 out 



With 



% In- 

 crease 

 by 



Station Garden. 



Fertilization. 



With- 

 oui 



With 



% In- 

 crease 

 by 



2.062 



.828 

 3.618 



2.356 I 14.25 , 3.240 



.807 j— 2.53 i .853 



3.773 I 4.28 3.819 



3.254 



.856 



4.095 



0.43 

 0.35 

 7.23 



It will thus be seen that by fertilization with potash, the 

 average percentage of that constituent in each soil is 

 increased. This increase is large in the poor soil and small 

 in the rich. Fertilization with nitrogen, also, has a well 

 marked influence on the percentages of that constituent, as 

 the above table shows. 



The results that we have hitherto been considering were 

 obtained from the analysis of the plant in the early flower- 

 ing stage. It was deemed expedient to analyze the plant in 

 a later stage, also, and so about three months after the first 

 samples were taken, when the plant was full of unopened 

 bolls, the second lot were drawn. One of the purposes of 

 this investigation was to see if the percentages of potash, 

 phosphoric acid, and nitrogen in the plant did not increase 

 with the yield of cotton. This could hardly be otherwise, if 

 the seed were ground up with the stalk, inasmuch as the 

 seed are a reservoir, so to speak, in which these constituents 

 accumulate. Hence it was thought best not to include the 

 young, inmature seed in the sample for analysis, and thej' 

 were accordingly rejected. The results of the analysis are 

 given in Table III following, which is constructed after the 

 model of Table I. Here, as in the other, the results are cal- 

 culated to the dry substance. 



