350 The Woburn Field Experiments , 1908. 
Produce of Barley per acre. 
Head corn 
Tail 
corn 
Plot 
Treatment per acre 
Bush. 
Weight 
per 
bushel 
Weight 
Straw, &c. 
1 
Untreated ... . . 
24-06 
Lb. 
56-25 
Lb. 
34 
C. q. lb. 
16 1 0 
2 
Lump lime, 2 tons .... 
41-03 
55’75 
79 
23 0 27 
3 
Ground lime, 10 cwt. .... 
30-47 
55-5 
53 
22 1 2 
From these results it will be seen how much the land stood 
in need of liming. It was, moreover, very noticeable that 
while the land where sulphate of ammonia, and, to a lesser 
extent, “ nitrolim,” had been applied, had a thick growth of 
the weed Polygonum aviculare , the plots to which lime had 
been directly applied were almost entirely free of this weed. 
The use of ordinary lime at the rate of 2 tons per acre 
increased the yield of barley by no less than 17 bushels per 
acre, and did considerably better than the 10 cwt. of ground 
lime. It is proposed to renew later the application of ground 
lime so as to bring up the cost of it to that of the 2 tons of 
ordinary lime, and thus to judge which is the more economical 
to employ. This experiment, however, brings out very clearly 
the reason for the “ nitrolim ” having done so much better 
than sulphate of ammonia in the experiment last recorded. 
It is intended in 1909 to make more extended experiments 
both with “ nitrolim ” and with the other new nitrogenous 
material — calcium nitrate — also prepared from the atmosphere 
by electrical means, and to compare them with sulphate of 
ammonia and nitrate of soda as sources of nitrogen supply to 
crops. 
Varieties of Lucerne (Stackyard Field), 1908. 
The three different kinds of lucerne — Provence, American, 
and Canadian — sown in 1905, were kept down in 1908, and 
gave three cuttings, viz., on June 29, August 27, and October 16. 
The total green produce per acre for 1908 was as follows : — 
Varieties of Lucerne (Stackyard Field). 
Plot 
Green produce per acre, 1908 (thjrd year). 
T. 
c. 
q. 
lb. 
A 
Provence seed 
6 
13 
0 
14 
B 
American seed 
6 
4 
0 
7 
C 
Canadian seed ..... 
9 
3 
3 
0 
