196 The Woburn Field Experiments , 1904. 
The influence of the one application of 2 tons of lime, so long 
ago as December, 1897, still continues to manifest itself, as 
there was a certain, though small, crop on plot 2b, while there 
was none on 2a (without lime). The heavier application (plot 
9b) of nitrate of soda gave the highest produce of the year, 
17T "bushels, but the omission of nitrate of soda for the single 
year took the produce below that of the unmanured land. 
Rape dust, as in 1903, gave a rather heavier crop than did 
farmyard manure. 
The valuer reported that the wheat samples were an average 
set for the season. The farmyard manure plot (lib) was as 
good as any, and fully up to the average wheat of the district. 
The nitrate of soda plots (3 and 6) were about the worst 
samples, and it is noticeable also that these gave a lower weight 
per bushel than any of the others. 
Continuous Geowing op Barley {Stackyard Field), 
1904 (28th Season). 
The barley land was cleared of twitch during the winter and 
ploughed on December 12, 1903. All through the winter the 
line of plots on which ammonia salts were used, year after 
year, was distinguishable from the others by reason of the 
lighter colour of the soil. On March 24, 1904, 9 pecks per 
acre of “ Chevalier ” barley, taken off Fen land, were drilled, 
and on the same day farmyard manure (prepared as for the 
wheat, see page 193) and rape dust were respectively spread on 
plots 10b and lib. Mineral manures were sown on March 26, 
and the nitrogenous top-dressings in two lots (as with the wheat) 
on May 3 and May 25 respectively. There was very little 
crop visible on plots 2a or 5a, and 8a and 8b were also very 
patchy. By June 20, plot 2a Was just one mass of spurry and 
plot 5a was very little better ; where, however, lime had been 
applied (plots 2b, 5b, 8aa, 8bb) spurry was practically absent. 
The succeeding drought affected the barley plant very much, 
and ripening was much hastened. The crop was cut by August 
15, and carted home on August 22. Rain, however, coming 
on then, the crop had to be spread out and dried before it 
could be stacked. On November 1 it was threshed, the returns 
recorded, and the corn subsequently valued. The results are 
given in Table II. on page 195. 
The barley crop was, taken all round, a better one than that 
of 1903, when only 2 '2 bushels were grown on the unmanured 
land. The highest yield that year was 41 bushels, and in 
1904 37 bushels — in each case with the heavy dressing of 
nitrate of soda and minerals. The unmanured produce was 
4‘4 bushels, and that with minerals only (plot 4) 5’4 bushels. 
Ammonia salts continued to. show markedly their harmful 
