The  Woburn  Field  Experiments,  1909. 
377 
As  regards  these  earlier  sown  varieties,  they  continued 
quite  good  and  yielded  three  cuttings  each  during  the  year,  the 
first  on  July  7,  the  second  on  August  20,  and  the  third  on 
November  2.  The  plots  were  cleaned  early  in  summer  ; weeds 
and  grass  had  begun  to  invade  the  “ Provence  ” and 
“ American  ” plots,  but  the  “ Canadian  ” remained  much 
cleaner  and  the  better  crop  kept  the  weeds  down.  The  weights 
of  green  produce  (total  for  three  cuttings)  were  : — 
Varieties  of  Lucerne  (Stackyard  Field). 
Plot 
Green  produce  per  acre,  1909  (fourth  year). 
T. 
c. 
q. 
lb. 
A 
Provence  seed 
10 
10 
2 
14 
B 
American  seed  ..... 
11 
8 
3 
0 
C 
Canadian  seed  ..... 
16 
18 
3 
0 
For  the  fourth  successive  year,  accordingly,  the  Canadian 
Lucerne  has  yielded  the  largest  crop,  and  the  present  appear- 
ance of  this  plot  warrants  the  conclusion  that  it  will  continue 
to  occupy  the  ground  longer  than  the  other  two,  which  seem 
likely  to  be  soon  overrun  with  weeds. 
Inoculation  Experiments  with  “Nitro-Bacterine” 
{Stackyard  Field),  1909. 
The  field  experiments  on  inoculated  lucerne  and  white 
clover,  begun  in  1908,  were  continued  for  a second  year, 
although,  as  already  stated,  those  with  Argentine  lucerne 
suffered  much  from  fungoid  attack,  and  were  not  continued 
beyond  the  first  cutting.  The  white  clover,  however,  con- 
tinued quite  good.  It  was  decided  to  renew  the  inoculation 
with  “ nitro-bacterine,”  but,  the  seed  having  been  sown  the 
previous  year,  inoculation  had  to  take  the  form  of  spreading 
on  the  plots  soil  which  had  been  treated  with  “nitro-bacterine  ” 
preparation.  This  soil  was  spread  on  the  “ inoculated  ” plots 
on  June  3,  1909.  The  first  cutting  was  taken  on  August  20, 
and  the  weights  obtained  are  given  in  Table  VII.,  page  378. 
The  differences  of  weight  shown  in  one  plot  as  compared 
with  another  are  the  result  of  previous  manuring,  experiments 
on  the  manuring  of  lucerne  having  been  carried  on  for  a 
number  of  years  previously  on  these  same  plots.  As  between 
the  inoculated  half  and  the  not-inoculated  half  of  each  plot, 
there  was,  as  regards  the  lucerne,  a general  agreement  in 
showing  that  the  inoculation,  done  first  with  the  seed  in  1908 
and  repeated  in  1909  with  soil  top-dressing,  had  not  been  in 
any  way  beneficial.  This  had  been  the  similar  conclusion 
