N and P input in soil of dem. farm
2001
1999
1995
2001
1999
1995
Input, kg ha-1
32
0
2
30
15
13
160
122
59
Total I
14
10
7
Manure
0
0.5
13
17.6
4
Deposition & fixation
6
2
10
9
7
Fodder and animals
9
10
124
85
41
Fertilizers & seeds
P
N