442 



SUZUKI ; 



Hence l c c- of the ammonium chloride solution contains 0.0398 

 gram nitrogen. 



j^cc. Q f the ammonium chloride solution contains 0.5963 gram 

 nitrogen. 



II. Nitrogen determination of the ammonium chloride solu- 

 tion that had remained unabsorbcd, (after experiment). Total 

 unabsorbed solution were filled up to SOO 00 ', from which 2O 0-c- 

 and 30 ec- were distilled as above. 



1. 20 e-c - yielded 0.0220 gram nitrogen ( — 23.3°- c - baryta 

 solution) = 0.1% nitrogen. 



2. go 0-0, yielded 0.0330 gram nitrogen ( = 34.9°'°' baryta 

 solution) = 0.1% nitrogen, 



which, calculated to the original solution, give 



1. 3-67% 



2. 3.66^. Average 3.67,% nitrogen. 

 Therefore, total nitrogen remained unabsorbed = 0.5501 gram. 



Total nitrogen originally applied =0.5963 gram. 

 Total nitrogen absorbed =0.0462 gram. 



III. Nitrogen determination of sodium nitrate solution ap- 

 plied to the plant (before experiment.) 



jqc.c. Q f (-] ie SO( ii um nitrate solution were diluted up to I00 cc- , 

 from which each io 00, were taken for analysis. 



1. io c c - yielded 0.0150 gram nitrogen (temp. 6 °C, pressure 

 29.84 inches ; NO = 24.5 ce ). 



= 1.50^ or T$.o% of original solution. 



2. io cc - yielded 0.0150 gram nitrogen (temp. 6.°C, pressure 

 29.84 inches ; NO=24.5 cc ). 



Hence 3O e0 ' of the sodium nitrate solution contain 0.4497 

 gram nitrogen. 



VI. Determination of unabsorbed nitrogen in the sodium 

 nitrate solution. 



Total unabsorbed solution were concentrated to IOOO 0,0 - from 

 which 50 c - c - were analyzed. 



1. 50 c-c - yielded 0.0203 grams nitrogen (temp. I4.5°C, pres- 

 sure 30.18 inches ; NO =33.8°- c - ). 



2. 50 cc - yielded 0.0203 grams nitrogen (temp. I4.5°C, pres- 

 sure 30.18 inches ; NO = 33.8 0 - 0 -). 



Total nitrogen remained unabsorbed = 0.4060 gram. 

 Total nitrogen originally applied =0.4497 gram. 

 Therefore, total nitrogen absorbed by plants = 0.0437 gram. 



