380 
The  Wohurn  Field  Experiments,  1909. 
Table  VIII. — Experiment  with  Magnesia  on  Wheat,  1909. 
Lansome  Field — Produce  per  acre. 
Head  corn 
'i'ail 
com 
Value  of 
corn  per 
Plot 
Applications  per  acre 
id 
cbafL  &c. 
on 
Bush 
Sm 
basis  of 
^ as 
34d.  bd. 
Lb. 
Lb. 
c. 
q.  lb. 
s.  d. 
1 
f 1908—3  cwt.  magnesia,  ploughed  in  . 1 
1 1909— IJ  cwt.  magnesia,  top-dressed  . j 
798 
13-9 
67-6 
132 
17 
2 9 
34  0 
2 
/ 1908—3  cwt.  magnesia,  after  ploughing  1 
1 1909 — U cwt.  magnesia,  top-dressed  . J 
903 
15-7 
57-5 
81 
20 
3 14 
34  0 
3 
f 1908—6  cwt.  magnesia,  ploughed  in  . 1 
1. 1909— IJ  cwt.  magnesia,  top-dressed  . J 
732 
12-9 
56-5 
198 
16 
2 20 
33  6 
4 
19081  ® cwt.  magnesia,  after  ploughing) 
1 IJ  cwt.  magnesia,  top-dressed  . ) 
621 
107 
580 
195 
18 
1 4 
32  0 
5 
1909— No  magnesia  applied  . 
911 
15-6 
58-2 
119 
19 
2 5 
34  0 
on  which  the  larger  quantity  of  magnesia  was  used,  undoubt- 
edly give  an  indication  of  the  tendency  of  magnesia  to  reduce 
the  crop.  Further,  it  will  be  noted  that  the  valuation  of  the 
corn  was  lower  in  the  case  of  these  latter  plots.  The  wheat  of 
plot  4 in  particular  was  described  as  a “ poor  ‘ miller’s  wheat,’ 
small  in  berry.” 
“ Potato-spraying  ” Experiment  {Great  Hill),  1909. 
On  a portion  of  Great  Hill,  “ Up-to-date  ” potatoes  were 
grown  in  1909.  The  “ sets  ” were  planted  May  3-9,  12  tons 
per  acre  of  farmyard  manure  having  been  previously  applied. 
A good  crop  was  obtained,  and,  at  the  close  of  June,  by  which 
date  no  “ potato  disease  ” had  as  yet  shown  itself,  the  most 
level  portion  of  the  field  was  put  at  the  disposal  of  Mr.  Spencer 
Pickering,  of  the  Woburn  Experimental  Fruit  Farm,  who  was 
desirous  of  carrying  out  some  experiments  with  different  kinds 
of  “ spraying  mixtures.”  These  experiments  will  be  separately 
reported  on  by  Mr.  Pickering,  but,  as  some  of  the  portions  were 
left  unsprayed,  and  another  experiment  carried  out  here,  it  will 
be  of  interest  to  briefly  record  the  general  results  obtained. 
Mr.  Pickering’s  applications  consisted  of  : (1)  the  ordinary 
“ Bordeaux  mixture  ” (sulphate  of  copper  and  lime)  ; (2) 
Woburn  “ Paste  ” (introduced  by  Mr.  Pickering)  ; (3)  “ Straw- 
sonite.”  On  the  unsprayed  portion  a plot  was  left  as  it  was, 
and,  on  a second  portion,  when  disease  began  to  appear  (as 
happened  at  the  end  of  July),  the  “tops”  of  the  potatoes  were 
cut  off  altogether.  Disease  was  very  prevalent  throughout  the 
crop,  and  though  the  applications  were  put  on  rather  later  than 
was  desirable,  the  results  obtained  were  marked  ones.  These 
are  given  in  Table  IX. 
