Suggestions  for  the  Future.  335 
period  of  at  least  ten  to  twelve  years  before  a further  application 
is  required. 
Gas  lime  was  used  in  one  instance  (Laxton,  Experiment  8), 
and  had  the  effect  of  destroying  a great  deal  of  the  rough  grass 
and  producing  a sweeter  herbage. 
Botanical  Considerations. — With  the  exception  of  basic  slag 
and,  to  some  extent,  lime,  which  have  undoubtedly  brought 
up  a quantity  of  clovei*,  mainly  white  clover,  the  result  of 
manuring  has  been  seen,  not  so  much  in  any  change  of  the 
actual  constituents  of  the  pasture,  as  in  a sweetening  of  these, 
whereby  they  have  been  better  grazed  subsequently. 
Geological  Considerations. — The  attempt  has  been  made  to 
associate  the  profitable  use  of  certain  manures  with  the  exist- 
ence of  the  lands  on  certain  definite  geological  formations, 
but,  from  various  causes,  nothing  very  definite  can  be  drawn 
from  this.  On  soils  formed  from,  and  resting  on,  the  new  red 
sandstone  and  lower  greensand,  it  may  be  taken,  generally, 
that  lime  will  be  most  needed,  while  on  heavy  soils,  like  those 
on  the  lias,  gault,  and  London  Clay,  basic  slag  will  probably  be 
found  most  useful.  Yet  on  other  formations  such  as  the  old 
red  sandstone,  the  coal  measures,  and  even  the  chalk,  so  much 
will  depend  upon  the  overlying  beds,  and  whether  these  be 
light  or  heavy,  I'ich  or  poor  in  lime,  in  phosphoric  acid,  and 
so  on,  that  it  is  impossible  to  state  conclusively  what  is  likely  to 
do  best,  and  whether  lime  or  l)asic  slag  or  else  superphosphate 
should  be  applied,  and  whether  potash  will  be  needed  or  not. 
Suggestions  for  the  Future. 
As  regards  most  of  the  sites  the  questions  set  for  decision 
may  be  considered  as  answered  in  the  experience  of  the  plots 
which  have  done  best,  and  which  have  already  been  described. 
As  to  the  others  the  following  suggestions  are  made  : (a) 
In  the  experiments  on  laying  land  down  to  grass  at  Hatfield 
Peverel  (Experiment  3)  basic  slag  should  now  be  tried,  (ft) 
On  the  light  land  of  Tatton  Park  (Experiment  4)  it  might  be 
well  now  to  see  whether  smaller  applications  of  lime — say  of 
1 ton  and  2 tons  per  acre — would  not  effect  the  purpose  and  at 
less  cost.  This  might  also  be  tried  at  Limber  (Experiment  6) 
and  Barnsley  (Plxperiments  15,  16,  17).  (c)  On  the  lias  clay  of 
“Willow  Field  ” (Experiment  7)  it  would  be  best  to  plough  up 
the  land  and  lay  down  again  with  suitable  mixtures  ; and  in 
Laxton  Park  (Experiment  8),  to  decide  by  expei-iment  whether 
5 to  6 cwt.  of  basic  slag  per  acre  are  equally  effectual  as  the 
8 cwt.  hitherto  tried,  (d)  At  Bishop  Auckland  (Experiments 
12  and  13),  the  applications  of  lime  and  basic  slag  should  be 
renewed,  and  farmyard  manure  might  be  subsequently  applied, 
(e)  At  Bodenham  (Experiments  19  and  20),  it  would  be  best 
