6l2 



Journal of Agricultural Research 



Vol. VI, No. 16 



Seissl (32) experimented with a large number of plants in various 

 stages of growth and found a slight fluctuation in the ratio of calcium 

 to magnesium in the ash analyzed in the different years. In nearly 

 every instance there was a progressive increase in the ratio of the lime 

 to the magnesia content towards autumn. In only two cases was the 

 lime content greater than that of the magnesia. * • 



Table XX. — Composition of soybeans at different periods of growth 



Treatment. 



Pot No. 



Soybeans 53 days old. 



Calcium. 



Mag- 

 nesium. 



Molecular 

 ratio of 

 calcium 

 to mag- 

 nesium. 



Soybeans 80 days o!d. 



Calcium. 



Mag- 

 nesium. 



Molecular 

 ratio of 

 calcium 

 to mag- 

 nesium. 



None 



Percentage of magnesi- 

 um in dolomite C3 : 



12.7 



Percentage of magnesi- 

 um in magnesite: 



10 



2 



Percentage of magnesi- 

 um in magnesium sul- 

 phate : 



0.1 



.01 



.001 



Percentage of magnesi- 

 um in magnesium 

 chloricl : 



0.1 



.01 



.001 



Percentage of magnesi- 

 um in magnesium car- 

 bonate: 



0.01 



.001 



None 



Percentage of magnesi- 

 um in calcareous soil : 



2.64 



i-3 2 



•672 



•344 



None 



Percentage of magnesi- 

 um in magnesite: 



10 



187 



185 

 183 



221 

 223 

 225 



227 

 229 

 231 



233 

 235 

 237 



241 

 243 

 245 



247 



239 



249 

 252 



Per cent. 

 C344 



1-546 

 .96 



i-357 



1. 19 

 •855 

 •59 



733 



93 



386 



94 

 *4S 



55 



96 



225 

 54 



2 55 

 864 



Per cent. 

 O.449 



.964 

 I. 032 



I. 21 



. 642 



•34 



665 



724 

 285 



825 

 609 



.741 

 •737 

 ,785 

 •745 

 • 354 



19 

 496 



5:10.8 



5 : 5-2 



5: 9 

 5: 5-2 



5: 8.4 

 5: 6. 2 

 5: 4-8 



7-5 

 6.4 

 6. 1 



5: 7-3 

 5 : 4-4 

 5-' 4-7 



5: 3- 1 



5 : 3-3 



5 : 4-4 



5 : 5-1 



5 : 5-4 



5: 7-9 

 5 :i 4- 4 



Per cent. 



o. 29 



2. 07 



•75 

 i- IS 



1. 71 



1. 215 



.6 



55 

 65 

 27 



i- 13 



i-57 



.36 



3-o 

 3-65 

 2.7 

 2. 11 

 •17 



55 



!45 



Per cent. 

 O.28 



i-3 



1-138 

 .815 



2. 28 

 i-3i 

 •356 



i-33 

 •495 

 •255 



J 9 

 399 



•997 

 1. 26 

 1. 016 



•79 

 . 118 



i-55 

 2. 166 



5: 8 

 5: 5-2 



5:12. 6 

 5: 5-9 



5:11.1 



5: 9 

 5: 4.8 



5: 4-3 

 5: 6.3 

 5: 7-9 



5: 8.7 



5: 2.1 

 5-' 4-2 



5: 2.77 



5: 2.87 



5: 3- 1 



5: 3-i 



5: 9-2 



5: 8.3 

 5:i5-75 



