664 Waring Ion, — The Effect of Doric Acid and Borax on 
Table XI. 
Nitrogen in Dry Matter. Broad Beans grown in Pot Culture . 
JdnBOo per 
Mixed throughout 
the soil. 
Mar. 4- May 3 r, 
1921. 
Top-dressed 25 days 
after solving. 
April 15-June 29, 
1921. 
Top-dressed directly 
after sowing. 
Mar . 18 -June 16, 
1922. 
Boric Acid. Borax. 
0 O X 
pot. 
Actual N. 
% N. Actual N. 
%N. 
Actual N. 
Actual N. 
grm. 
4.0 
3*59 
grm. 
0-2 2 
grm. 
— 
grm. 
— 
grm. 
2-0 
2.95 
°-35 
- - 
— 
■ 
1 
1 
1*0 
2 74 
0.51 
- - 
3-46 
0-42 
3 32 
0*40 
o -5 
2-57 
o -57 
3.22 0.38 
3.28 
0-6 ! 
3 -i 3 
o -57 
0-1 
2.67 
o -57 
2.51 °*55 
2.58 
0-36 
2-92 
o-6o 
0*02 
2.50 
°*49 
2.62 0-57 
2.77 
0.58 
2*95 
0.65 
Control 
2-59 
o -55 
2.61 0-55 
3 '°° 
0.65 
3 ‘°° 
0*65 
Table XII. 
Nitrogen in 
Dry Platter. 
Barley grown in 
Water Culture. 
Feb. 21- 
May 24 
, 1921. 
Mar. 1- 
-May 11, 192 
12. 
Concentration 
Boric Acid. 
Borax. 
of 
y Q N. 
Actual N. 
%N. 
Actual N. / N. 
Actual A\ 
H z BO z . 
grm. 
grm. 
grm. 
1 :5,000 
3- s 7 
0*06 
— 
— 
— 
— 
1 : 25,000 
2-So 
0-27 
— 
— 
— 
— 
1 : 50,000 
2*42 
0-36 
426 
0-23 
4* 2 5 
0*21 
1 : 100,000 
2-36 
0.36 
3-70 
0-24 
3\39 
0*23 
1 : 500,000 
2*09 
o -39 
3-54 
0*24 
2-93 
0*23 
1 : 2,500,000 
1*78 
°’35 
3*34 
0-22 
3-02 
0*25 
1 : 12.500,000 
I '54 
o -37 
3«io 
0*27 
2*99 
0*25 
1 : 100,000,000 i-S8 
o -34 
3*oi 
0 * 2(3 
2*60 
0*25 
Control 
1*63 
o *35 
2-59 
0*25 
2-59 
0*24 
Table XIII. 
Nitrogen in Dry Matter. Barley grown in Pot Culture . 
Mixed throughout the soil. Top-dressed 15 days after sowing. 
IfBOo o per 
Feb. 2\-July 8, 1921. 
April 15- Aug. 6, 1921 
pot. 
%N. 
Actual N. 
%#• 
Actual N. 
grm. 
grm. 
grm. 
4*0 
2*52 
0*13 
— 
— 
20 
1*24 
0*23 
3*37 
o-iS 
1*0 
0*96 
0*29 
2*87 
0*29 
o -5 
0*90 
0*31 
2*30 
0*37 
0*1 
0*82 
0*29 
1*48 
0*39 
0*02 
0*84 
0*29 
i- 5 i 
o -33 
Control 
0*83 
0*29 
o *33 
In the case of broad beans, however, the individual variation is very 
great, and the probable error for the series treated with boric acid mixed 
throughout the soil (Table VI) ranges from + 7*35 to + 1-92 for the green 
