50 



OSWALD SCHREINER AND J. J. SKINNER 



TABLE II 



Effect of nucleic acid on growth in culture solutions containing 8 p.p.m. of NH3 



as nitrate 





FEBTILIZER INGREDIENTS IN CDLTDRE 

 SOLUTIONS 



GREEN WEIGHT OF CULTURE 



CULTOHE NO. 



P2O6 



NH3 



K2O 



Without nucleic 

 acid 



With 100 p.p.m. 

 nucleic acid 





p.p.m. 



p.p.m. 



p.p.m. 



grams 



grams 



57 



0 



8 



72 



2.709 



3.400 



47 



8 



8 



64 



2.590 



3.340 



38 



16 



8 



56 



2.890 



3.300 



30 



24 



8 



48 



2.629 



3.700 



23 



32 



8 



40 • 



2.850 



3.700 



17 



40 



8 



32 



2.770 



3.600 



12 



48 



8 



24 



2.800 



3.150 



8 



56 



8 



16 



2.200 



2.750 



5 



64 



8 



8 



2.225 



2.500 



3 



72 



8 





1.609 



1.640 



acid, an increase of 23 per cent. In the cultures with no nitrate 

 the nucleic acid produced an increase of 74 per cent. 



Growth in cultures with larger amounts of nitrate 



The series of cultures containing 16 parts per ixdllion of NH3 

 as nitrate did not produce as much additional growth when nucleic 

 acid was added as did the two series with no nitrate, and with 8 



TABLE III 



Effect of nucleic acid on growth in culture solutions containing 16 •p.p.m. of NHj 



as nitrate 



CULTURE NO. 



FERTILIZER INGREDIENTS IN CULTURE 

 SOLUTIONS 



OREEN WEIGHT OF CULTURE 





NHa 



K2O 



Without nucleic 

 acid 



With 100 p.p.m. 

 nucleic acid 





p.p.m. 



p.p.m. 



p.p.m. 



grams 



grams 



58 



0 



16 



64 



2.900 



3.800 



48 



8 



16 



56 



3.500 



4.300 



39 



16 



16 



48 



3.150 



3.450 



31 



24 



16 



40 



3.300 



3.770 



24 



32 



16 



32 



3.249 



3.700 



18 



40 



16 



24 



3.439 



3.550 



13 



48 



16 



16 



2.800 



3.190 



9 



56 



16 



8 



2.400 



2.320 



6 



64 



16 





1.745 



1.650 



