lit)  Experiments  of  the  late  Mr.  James  Mason. 
Table  II. — Scheme  of  a Rotation  of  Crops  at  Eynsham  Hall. 
1 1 
Crop  grown 
Manure 
used 
per  acre 
Produce 
per  acre 
Nitrogen  production 
and  consumption  by 
Plant  growth  per  acre 
Pro- 
duce 
con- 
sumed 
Pro- 
duce 
sold  off 
Nitrogen-producing  Crops 
1 
Pro- 
duced 
by 
crop 
Sold 
off 
land 
Fed  to 
ani- 
mals on 
land, 
part  of 
which 
returns 
in 
excreta 
1st  i Spring  beans  and 
clover 
Basic 
slag  and 
kainit 
12  tons 
green 
beans and 
clover 
Lb. 
1 130 
Lb. 
None 
Lb. 
Ensil- 
age 
None 
j Clover  aftermath 
— 
3 tons 
after- 
math 
32 
162 
— 
— 
2nd,  Clover  hay. 
i 
None 
3 tons 
hay 
168 
Clover, 
hay, 
and  en- 
silage 
Con- 
sumed 
or  sold 
Clover  hay  after- 
math  (to  ensilage) 
— 
4 tons 
hay 
43 
211 
— 
— 
1 Totals  for  nitrogen-producing  crops 
373' 
None 
373 
- 
- 
Nitrogen-consuming  Cro]is 
Fed  to 
ani- 
Con- 
sumed 
by 
Sold 
off 
msUs  on 
land, 
part  of 
land 
which 
crop  1 
returns 
in 
excreta 
Lb. 
Lb. 
Lb. 
Potatoes  or  mangels. 
Dung  \ 
1 
Ac.,  Ac. 
and 
10  tons 
56 
45 
11 
Small  Large 
basic, 
potatoes. 
i 
pota-  1 pota- 
or 
toes  toes 
nitrate 
}■ 
or 
1 
or 
top- 
root.s  ! , 
dress- 
25  tons 
123  1 
— 
123 
man-  — 
ing  and 
basic  / 
mangels 
! 
gels  j 
Winter  wheat  or  oats 
None, 
36  bush- 
38 
38 
_ 
— , Wheat 
some 
nitrate 
wheat 
top- 
dress- 
IJ  tons  of 
straw 
22 
- 
22 
Straw  — 
1 
ing  J 
Totals  for  nitrogen-consuming  crops 
116  1 
83 
33 
or 
183 
38 
145 
I 
> Taken  as  derived  or  fixed  from  the  atmosphere. 
After  the  production  in  the  green  plant  of  373  lb.  of  nitrogen  per  acre,  we  have 
to  take  into  account  the  amount  existing  underground,  in  the  bean  and  clover  roots, 
and  also  the  amount  which  accumulates  in  the  soil  itself  by  the  action  of  the  legumi- 
nous growth. 
As  a matter  of  course,  a considerable  quantity  of  nitrogen  would  he  removed 
annually  from  the  land,  by  sale  of  cattle,  horses,  and  pigs  bred  and  fed  on  it,  having 
in  the  meantime  consumed  hay,  potatoes,  silage,  straw,  Ac. 
