The Woburn Field Experiments, 1908. 355 
These figures show clearly that, as between the three 
varieties, the “ Invicta ” were decidedly the best, and the 
“ Kangaroo ” the next best. This was the case whatever the 
manuring was. As regards the manuring, the notable point is 
that the application of nitrate of soda reduced the crop in each 
case, though it made the tops look more luxuriant. The basic 
turnip manure could not be said to have generally produced 
any benefit over the standard dressing. It gave some gain with 
the “ Elephant ” variety, but not with the other two. 
Experiment on the Use of Salt for Mangolds 
{Warren Field), 1908. 
Experiments conducted on the mangold crop for the last few 
years having shown in each case a distinct benefit to arise from 
the use of 1 cwt. of salt per acre along with nitrate of soda when 
used as a top-dressing, the question was not unfrequently asked 
whether a larger quantity of salt might not be still more 
beneficial. Accordingly the experiment of 1908 was arranged 
with this view, seven plots being marked out for each of four 
different varieties of mangold. A general dressing per acre 
of farmyard manure, 12 tons ; superphosphate, 3 cwt., and 
sulphate of potash, 1 cwt., was given to all the plots alike, 
plot 1 receiving this alone. To plot 2, 1 cwt. per acre of nitrate 
of soda was given as a top-dressing ; plot 3 had 1 cwt. of nitrate 
of soda and 1 cwt. of salt per acre as top-dressing, while plots 4, 
5, and 6 had each 1 cwt. of nitrate of soda as a top-dressing, but 
the quantity of salt given with the nitrate of soda rose from 
2 cwt. per acre on plot 4, to 4 cwt. on plot 5, and 6 cwt. on plot 6. 
One-half of the salt was put in the drills, and the other half 
used with the 1 cwt. nitrate of soda as top-dressing. Lastly, on 
plot 7, 1 cwt. per acre of “ nitrolim ” (calcium cyanamide) was 
used in the drills in addition to the usual dressing. The farm- 
yard manure was carted and spread on May 11-14, 1908, and 
the superphosphate and sulphate of potash were given on May 
15-16. The mangold seed was then drilled. Four different 
varieties were tried, viz., “ Sugar Mangold,” “Golden Tankard,” 
“ Yellow Globe,” and “ Mammoth Long . Red.” The top- 
dressings were applied July 10-11. 
It was noticeable that the Sugar Mangold “ bolted ” very 
much more than any other variety. 
The crops were pulled and weighed October 30 to 
November 7. The results are given in Table XV., page 356. 
Of the four different varieties the “Yellow Globe” gave, 
all round, the greatest weight, the “ Long Red ” being but little 
behind ; “ Golden Tankard ” gave the smallest yield. It will 
next be seen that the top-dressings in all cases increased -the 
crop very materially. The lowest increase was with the 
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