Agriculture Reference
In-Depth Information
(NH
4
)
2
SO
4
(NH
4
)
2
SO
4
(NH
4
)
2
SO
4
mg N kg
-1
0
200
400
100
FIGURE 3.33
(
See color insert.
) Response of lowland rice applied with ammonium sulfate. Half of the N
was applied at sowing and the remaining half at the active tillering growth stage.
CO(NH
2
)
2
CO(NH
2
)
2
CO(NH
2
)
2
0
200
400
mg N kg
-1
100
FIGURE 3.34
(
See color insert.
) Response of lowland rice to N fertilization applied with urea. Half of the
N was applied at sowing and the remaining half at the active tillering growth stage.
