Joint International Conference on Long-term Experiments ...

Influence of manure applied on different NP backgrounds on preluvosoil reaction
(figure 2)
It is well known that the manure applied in acid soil conditions are increasing the
degree of base saturation in the same time increasing the buffering capacity of the soil. On
this way is possible to avoid unfavorable effect of chemical fertilizers with acid potential.
pH values
7.00
6.00
5.00
Background N0P0
y = 0.0002x 2 - 0.0011x + 6.273
R 2 = 0.9601
4.00
0 20 40 60
pH values
7.00
6.00
5.00
pH values
Manure rates-to/ha
Background N50P50
y = 6E-06x 2 + 0.0061x + 5.8465
R 2 = 0.9971
4.00
0 20 40 60
7
6
5
4
Manure rates -to/ha
60
Manure rates- to/ha
40
20
0
pH values
7.0
6.0
5.0
4.0
pH values
Background N50P0
y = 2E-05x 2 + 0.0052x + 5.609
R 2 = 0.9998
0 20 40 60
7.00
6.00
5.00
Manure rates- to/ha
Background N100P100
y = -4E-05x 2 + 0.0097x + 5.6885
R 2 = 0.9858
4.00
0 20 40 60
Manure rates- to/ha
Figure 2: Influence of manure of preluvosoil reaction from North-West part of Romania
16
N0P0
N50P0
N50P50
N100P100
NP rates kg/ha