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The Woburn Field Experiments , 1913. 393 
Nitrate of soda, generally, produced the most straw, but 
gave the lowest weight per bushel in the corn. 
The corn was valued, as usual, but was found not to be up 
to the average. It contained a lot of “tail ” corn, and was not 
well matured. The produce of several of the plots, indeed, 
was not fit for milling. 
The complete harvest results, together with the valuation of 
the corn, are given in Table I., page 394. 
Continuous Growing of Barley {Stackyard Field ) 
1913 (37th Season). 
The land was ploughed in November, 1912, and again in 
February (12-17), 1913. On February 13, 1913, farmyard 
manure, giving 100 lb. ammonia per acre, was ploughed in. 
“ Chevalier ” barley, at the rate of 9 pecks per acre, was drilled 
on March 31 over the different plots, the seed having been 
previously dressed with sulphate of copper. Mineral manures 
and rape dust were applied immediately afterwards, and the 
nitrogenous top-dressings on May 9 and May 27. 
As with the wheat, so here the nitrate of soda plots ripened 
much better than those dressed with sulphate of ammonia, 
though, as stated, the ripening of the corn was much delayed. 
The crop was cut on September 1-5, but, owing to rain, it 
took long to dry, and could not be threshed out until Septem- 
ber 17. Even then it was not in good condition, and the 
quality of the corn suffered greatly thereby. 
The harvest results are given in Table II., page 395. 
The general results of harvest were distinctly superior to 
those obtained in 1912. The average of the two unmanured 
plots (1 and 7) was 6 - 7 bushels per acre of corn, which was less 
than in 1912. 
Mineral manures alone produced 12*2 bushels of corn per 
acre, and it is worthy of note that Equisetum arvense , which 
had been such a prominent weed on this plot in 1912, did not 
now exist to anything like the same extent. 
Nitrate of soda used alone gave 15T bushels of barley, the 
doubling of the amount, however, only producing 1*3 bushels 
per acre more ; but the addition of minerals raised the crop 
to 22’6 bushels when the single dressing of nitrate of soda was 
used, and to 30*6 bushels per acre with the double dressing. 
The omission, for a single year, of the nitrate made a difference 
of nearly 11 bushels. 
Sulphate of ammonia by itself (plot 2a) provided, as usual, 
a blank, as also was the case when minerals only were used 
with it (plots 5a, 8a, 8b), but no lime. Sulphate of ammonia 
along with one ton of lime (in four separate applications) 
on plot 2aa gave 11*9 bushels; of corn, and the same with 
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