Manurial  Applications.  333 
but  the  experience  of  the  three  sites  there  has  shown  nothing 
to  justify  this. 
Kainit. — As  remarked,  the  soils  experimented  on  happened 
not  to  be  deficient  in  potash,  and  hence  no  definite  conclusions 
can  be  drawn,  though,  on  soils  much  lighter  in  character, 
potash  might  have  been  shown  to  be  a necessary  constituent. 
Where,  as  at  Latimer  (Experiments  9 and  10),  kainit  has  been 
extensively  used,  there  is  no  clear  proof  of  its  being  essential. 
Even  on  “Wilkinson’s  Land”  (Experiment  14),  where  the  soil 
had  only  0'13  per  cent,  of  potash,  the  further  supply  did  not 
seem  needed. 
Nitrate  of  Soda. — In  the  two  instances  where  this  was 
tried  in  conjunction  with  mineral  manures  (Morton  Jeffries, 
Experiment  18;  and  Wilburton,  Experiment  21)  the  result  was 
not  more  than  to  give  a temporary  increase  of  grass  the  first 
season,  but  to  leave  no  permanent  benefit. 
Farmyard  Manure. — The  general  effect 'of  the  use  of 
farmyard  manure  by  itself  has  been  to  pi-oduce  a heavy  growth 
of  herbage,  with  increase  of  grass  at  the  expense  of  clovers 
(Laxton,  Experiment  8 ; Latimer,  Experiment  9 ; and  Basing- 
stoke, Experiment  11).  In  a dry  year,  farmyard  manure  has 
done  well,  no  doubt  through  aiding  the  retention  of  moisture ; 
but  the  result  has  not  been  a lasting  one,  except  in  the  one  case 
of  “ Wilkinson’s  Land  ” (Experiment  14),  where  the  land  was 
very  poor,  and  had  long  suffered  from  impoverishment.  When, 
however,  farmyard  manure  followed  the  application  of  lime 
(Tatton  Park,  Experiment  4 ; and  Limber,  Experiment  6),  then 
the  benefit  was  a marked  and  permanent  one,  and  few  plots 
did  so  well  as  these. 
Mineral  Superphosphate. — Where  soils  have  contained 
sufficient  lime,  and  where  these  are  not  too  heavy  in  character, 
it  has  been  shown  that  superphosphate  is  quite  as  effectual  as 
basic  slag  (Limber,  Experiment  ti ; Morton  Jeffries,  Experiment 
18).  Also,  after  land  has  been  well  limed,  superphosphate 
can  economically  replace  basic  slag.  But,  in  the  absence  of 
sufficient  lime,  superphosphate  is  not  to  be  relied  upon. 
Basic  Slag. — If  there  is  one  material  besides  lime,  the 
value  of  which  the  experiments  have  brought  out,  it  is  basic 
slag.  This  is  due  in  considerable  measure,  no  doubt,  to  the 
experiments  having  been  for  the  greater  part  on  heavy  cold 
lands,  some  of  them  in  need  of  draining ; but,  nevertheless,  it 
is  made  clear  that  basic  slag  is  a material  which  every  grass- 
farmer  having  inferior  pasture  would  do  well  to  try.  Speaking 
generally,  it  is  on  heavy  land  of  poor  character  and  with  a 
tendency  to  being  wet,  that  basic  slag  will  produce  the  best 
results,  and  on  lighter  lands  it  is  less  likely  to  be  of  advantage. 
It  has  undoubtedly  on  the  former  class  of  land  (Laxton, 
