342  The  Woburn  Field  Experiments , 1910. 
Table  XIV. — Grass  Experiments  ( Broad  Mead). 
Produce  of  Hay,  1910,  and  boianical  separation. 
Plot 
Manures  per  acre  in  1901,  1904, 
1906,  and  1909 
Weight 
Botanical  separation 
of  hay 
per  acre 
Gra- 
mme® 
Legu- 
minosffl 
Miscel- 
laneous 
1 
Basic  slag,  10  cwt.  ; nitrate  of 
potash,  1 cwt. 
T.  c.  q.  lb. 
112  0 0 
per  cent. 
84-7 
per  cent. 
36 
per  cent. 
11-7 
2 
Mineral  superphosphate,  5 
cwt.  ; sulphate  of  potash, 
1 cwt.  ..... 
1 7 0 0 
82-7 
93 
80 
3 
Basic  slag,  10  cwt.  ; sulphate 
of  potash,  1 cwt.  . 
1 15  3 0 
84  0 
8-0 
80 
4 
No  manure  .... 
1 5 2 0 
90  0 
3-8 
6 2 
5 
Lime,  2 tons  .... 
1 2 1 0 | 
873 
4-5 
82 
6 
Farmyard  manure,  12  tons 
1 18  1 0 j 
8H-3 
64 
73 
As  usual,  the  highest  produce  of  hay  was  given  by  the 
farmyard  manure,  but  the  quality  of  this  was  coarse,  and  there 
was  but  little  clover  in  it.  The  next  highest  yield  was  from 
the  use  of  basic  slag  with  sulphate  of  potash  (plot  3),  mineral 
superphosphate  with  sulphate  of  potash  (plot  2)  yielding  nearly 
9 cwt.  per  acre  less.  All  the  plots  with  the  exception  of  the 
limed  one  (plot  5)  gave  an  increase  over  the  unmanured  plot, 
and  on  the  limed  plot  the  finer  herbage  and  fresher  appearance 
were,  as  in  other  years,  very  marked,  though  the  hay  was  less 
in  amount.  It  is  clear,  however,  that  this  plot  requires  some- 
thing further  than  lime  to  stimulate  it,  and  a change  in  the 
plan  will  now  be  made. 
The  botanical  examination  of  the  herbage  yielded  results 
much  on  the  general  lines  of  previous  years.  The  two  plots 
(2  and  3)  to  which  sulphate  of  potash  had  been  applied  contained 
more  leguminosas  than  did  any  of  the  others  ; plot  2 (super- 
phosphate and  sulphate  of  potash)  giving  the  most,  as  was  the 
case  in  1908.  The  lowest  proportion  of  leguminosae  was  found 
on  the  unmanured  plot  (plot  4),  and  on  that  manured  with 
nitrate  of  potash  and  basic  slag  (plot  1).  The  most  marked 
changes  from  previous  years  were — (1)  the  increase  in  the 
leguminous  herbage  on  the  farmyard  manure  plot  (plot  6), 
and  (2)  the  general  increase  all  round  of  leguminoste  and  of 
“ miscellaneous  ” plants.  In  1908  the  highest  percentage  of 
leguminous  herbage  was  4'5  (plot  2),  and  the  lowest  -07  (plot 
1)  ; now  (1910)  the  highest  percentage  was  9*3,  the  lowest  3-G, 
these  being  given  by  the  same  plots  respectively  as  in  1908. 
Miscellaneous  Experiments. 
In  addition  to  the  foregoing,  other  experiments  have  been 
carried  out. 
