i58 



BOTANICAL GAZETTE 



[august 



but 8ppm. of NH 3 . The average growth of the cultures without 

 nitrogen is 1.516 grams against 2.407 grams with 8ppm. of NH 3 

 in the fertilizer mixture. Putting the growth of the cultures with- 

 out nitrogen at 100, the relative growth of the cultures with nitrogen 

 becomes 159, or an increase of 59 per cent. 



TABLE IV 



Showing the growth of cultures, composed of fertilizer mixtures containing 



NO NITRATE, AND 8 PPM. OF NH 3 AS nitrate, without and with creatinine 



No. 



I 



2 



3 



4 



5 

 6 



7 



8 



9 



10 



11 

 12 



13 



14 



IS 



16 



17 



18 



19 



20 



21 



PPM. OF FERTILIZER INGREDIENTS 

 IN CULTURE SOLUTION 



P.O 



o 



8 



8 



16 



16 



24 



24 



32 



32 

 40 



40 



48 

 48 

 56 



56 



64 

 64 



72 



72 

 80 



XH, 



K,0 







80 



8 



72 







72 



8 



64 







64 



8 



56 







56 



8 



48 







48 



8 



40 







40 



8 



32 







32 



8 



24 







24 



8 



16 







16 



8 



8 







8 



8 















Green weight of cultures in grams 



Without creatinine 



No nitrate 



1 .400 



I.470 



I.950 



I-527 



I.490 



1.558 



1-795 



I.540 



I.444 



I.400 



I. IOO 



8 ppm. NH 3 



I .820 



2.470 



2.748 

 2.907 

 2.670 



• • • 



2.928 

 2.526 



2.600 



2.048 



1-354 



With creatinine 



No nitrate 8 ppm. NH 3 



1576 



2. 200 



2.IOO 



• ♦ 



2.000 



2.200 



2.408 

 2.328 



2.4OO 



2. 220 



2.IOO 



1.15° 



2. I9O 



3.IOO 



3.250 

 3.420 



2.450 



• ■ 



3.258 

 3340 

 3.OOO 



2.359 

 I-750 



With 50 ppm 



the solution, the cultures con- 



taining no nitrogen produced better growth than the corresponding 



wi 



columns 



table IV. The difference between the last two 

 marked in the creatinine set as in the corresponding columns for the 

 normal set. The average growth of the creatinine cultures without 

 nitrate is 2.062 grams against 2.812 grams for the cultures having 

 8 ppm. of NH 3 as nitrate in the fertilizer mixture. If the growth 

 of the cultures without nitrate is put at 100, the growth with 8 ppm. 



