326 
The  Woburn  Field  Experiments , 1910. 
(sulphate  of  ammonia  only)  was,  as  usual,  an  entire  blank,  the 
repetition  of  5 cwt.  per  acre  of  lime,  on  plot  2aa,  now  gave  123 
bushels,  whereas  in  1909  there  was  no  crop  ; the  2 tons  of  lime  per 
acre  last  applied  to  plot  2b  in  1897  still  continued  to  give  a good 
yield  of  23-4  bushels,  being  in  excess  of  the  22  2 bushels  on 
plot  2bb,  which  had  the  2 tons  of  lime  repeated  in  1905.  The 
latter,  however,  it  will  be  seen,  produced  considerably  more  straw. 
This  shows  that  the  influence  of  lime  is  clearly  marked  for  quite 
thirteen  years.  The  produce  of  plot  5a  (minerals  and  sulphate  of 
ammonia,  without  lime)  continued  to  fall,  but  plot  5b  (the  same 
manures,  with  1 ton  of  lime  per  acre)  yielded  well,  as  also  did 
8bb  (the  same  manures,  with  10  cwt.  per  acre  of  lime  in  1905), 
thus  showing  that  1 ton  of  lime,  and  even  as  little  as  10  cwt., 
per  acre,  will  tell  for  five  years  and  more.  These  smaller 
quantities  of  lime,  it  should  be  said,  were  put  on  as  “ ground  ” 
lime.  Nitrate  of  soda  alone,  about  1 cwt.  per  acre,  gave  (plot 
3b)  20'5  bushels,  and,  at  the  rate  of  about  2 cwt.  per  acre 
(plot  3a),  only  slightly  more,  viz.,  23'3  bushels,  though  the 
straw  was  considerably  increased.  With  mineral  manures  in 
addition,  1 cwt.  per  acre  of  nitrate  of  soda  yielded  (plot  6) 
23'3  bushels,  the  corresponding  sulphate  of  ammonia  plot,  with 
lime  (plot  5b),  giving  24T  bushels.  The  heavier  dressing  of 
nitrate  of  soda,  with  minerals  (plot  9b),  produced  the  highest 
yield,  viz.,  27’8  bushels,  the  omission  of  nitrate  of  soda  for  a 
single  year  (plot  9a)  causing  a fall  to  13*5  bushels,  or  less  than 
the  unmanured  yield.  Lastly,  as  between  the  inclusion  of 
potash  or  of  phosphate  in  a mixed  manuring,  a slight  advantage 
lay  with  the  inclusion  of  phosphate,  plot  10a  giving  229 
bushels,  as  against  the  21-2  bushels  of  plot  11a  (phosphate 
omitted). 
When  the  corn  came  to  be  valued  on  January  4,  1911,  the 
average  for  the  district  was  put  on  a basis  of  32s.  per  quarter  of 
504  lb.  None  of  the  plots  quite  reached  this,  the  wheats,  as  a 
whole,  being  classed  as  poor  and  badly  grown,  lacking  strength, 
and  with  much  offal  corn. 
The  best  of  the  lot  were  the  unmanured,  minerals  only,  and 
rape  dust  plots  ; the  worst,  the  nitrate  of  soda  and  sulphate  of 
ammonia  plots,  these  also  giving  the  lowest  weight  per  bushel, 
and  the  nitrate  of  soda  plots  the  most  tail  corn. 
Continuous  Growing  of  Barley  ( Stackyard  Field), 
1910  (34th  Season). 
As  in  the  case  of  the  wheat,  so  the  repetition  of  5 cwt.  per 
acre  of  lime  (“  ground  ” lime)  was  made  on  plot  2aa,  but  there 
was  no  other  change  from  the  usual  course. 
After  the  preparation  of  the  land,  lime  was  put  on  plot  2aa 
on  February  24,  1910,  and  farmyard  manure  (to  give  100  lb. 
