376 
The  Wohurn  Field  Experiments,  1909. 
a weak  plant  which,  with  frost  and  snow  following  early  in 
January,  1909,  never  looked  healthy,  so  that  on  April  28,  1909, 
the  land  was  drilled  again  with  spring  tares.  On  the  same 
date  rape  seed  was  drilled  on  plots  3 and  4,  and  mustard  seed 
on  plots  5 and  6,  mineral  manures  being  given  to  plots  3 and  5. 
The  green  crops  grew  well  and  were  ploughed  in  on  June  30, 
a second  crop  of  each  being  then  grown  (seed  drilled  July  27)  ; 
this  in  turn  was  ploughed  in  green  on  September  23,  wheat 
being  subsequently  sown  on  all  the  plots.  Throughout  the 
year  the  same  differences  were  observed  which  were  noted 
before,  viz.,  the  darker  colour  of  the  tare  land  and  the  more 
“ open  ” texture  of  the  soil  as  compared  with  that  of  the 
mustard  land. 
Varieties  of  Lucerne  {Stackyard  Field),  1909. 
This  experiment  consisted  of  a comparison  of  three 
different  varieties  of  lucerne — (A)  Provence,  (B)  American, 
(C)  Canadian — which  had  been  first  sown  in  1905  and  which 
continued  to  give  satisfactory  crops  ; also  of  other  plots  sown 
in  1908  with  seed  that  came  direct  from  the  Argentine.  As 
regards  these  latter,  it  was  stated  in  the  1908  report  that  the 
plots  sown  with  it  became  without  exception  attacked  by  a 
fungus,  Pseudopeziza  Trifolii.  On  this  appearing,  the  crops 
were  cut  down  close  to  the  ground,  all  stray  stalks  removed, 
and  ground  lime  applied  in  the  winter  at  the  rate  of  1 ton 
per  acre.  This  stopped  the  disease,  and  the  plant  of  1909  was 
free  from  it.  There  was,  however,  so  little  crop  that,  after  one 
cutting  (August  20),  the  plots  were  given  up  and  the  land 
ploughed.  The  weights  recorded,  together  with  those  of  1908, 
were  : — 
Variety 
“Chubut”  . 
“ Buenos  Ayres  ” . 
“ La  Pampa  ” 
C. 
9 
11 
13 
Green  produce  per  acre 
1908 
q. 
1 
0 
3 
1909 
c.  q.  lb. 
4 0 12 
8 3 0 
19  1 24 
Thus,  of  the  three  varieties,  “ Buenos  Ayres  ” was  the 
best,  but,  owing  to  the  fungoid  attack,  none  were  really 
satisfactory  or  compared  at  all  well  with  the  Canadian  and 
other  varieties  sown  in  1905,  and  which  remained  quite  free 
from  disease  although  they  were  in  close  proximity  to  the 
attacked  plots. 
