Report  on  the  Field  and  Feeding  Experiments  at  Woburn.  219 
sulphate  of  ammonia,  has  a more  powerful  effect  on  the  produce 
of  wheat  in  the  first  season  than  a much  larger  amount  of 
nitrogen  in  the  shape  of  farmyard-manure  ; but  in  the  case  of 
artificial  manures  the  nitrogen  is  at  once  exhausted,  while, 
although  there  is  an  available  residue  of  the  dung,  in  all  pro- 
bability a large  percentage  of  it  will  never  be  recovered  in  the 
successive  wheat-crops. 
The  Experiments  on  the  Continuous  Growth  of  Barley. 
The  mineral  manures  were  sown  broadcast  on  the  14th  of 
March,  1882,  and  the  barley — Chevalier  Barley — was  sown  on  all 
the  experimental  plots  on  the  25th  of  March,  1882,  at  the  rate 
of  9 pecks  per  acre. 
The  nitrate  of  soda  and  salts  of  ammonia,  mixed  for  the  sake 
of  better  distribution  with  about  three  times  their  bulk  of  dry 
sand,  were  sown  by  a broadcast  manure-distributor  on  the 
27th  of  April. 
Well- rotten  farmyard-manure,  estimated  to  contain  nitrogen  . 
equal  to  100  lbs.  of  ammonia  per  acre  on  plot  10b,  and  200  lbs. 
of  ammonia  per  acre  on  plot  11b,  was  put  on  the  land  on  the 
26th  of  January,  1882. 
Four  bullocks,  which  made  the  dung,  when  put  into  the 
feeding-boxes  on  the  21st  of  November,  1881,  weighed — 
cwts.  qrs.  lbs. 
No.  1 9 12 
„ 2 9 0 2 
„ 3 9 16 
„ 1 9 2 26 
Total  weight  of  four  bullocks)  q-  -i  o 
on  the  21st  Nov.,  1881  ..  J 'J‘ 
In  the  course  of  three  weeks  the  four  bullocks  consumed — 
cwts.  qrs.  lbs. 
Decorticated  cotton-cake 2 2 0 
Maize-meal 4 0 0 
White  turnips  30  0 0 
Wheat-straw  chaff  500 
And  they  were  supplied  during  that  period  with  6^  cwts.  of 
wheat-straw,  cut  into  chaff  about  3 inches  long,  which  was 
used  as  litter. 
The  dung  was  removed  from  the  feeding-boxes  on  the  22nd 
of  December,  placed  in  a covered  hovel,  and  allowed  to  rot 
until  the  26th  of  January,  when  it  was  weighed. 
With  the  consumption  of  the  above-named  quantities  of  food 
and  wheat-straw  chaff  used  as  litter,  the  four  bullocks  produced 
29  cwts.  and  25  lbs.  of  rotten  dung. 
