Seed Ca (mg/kg)
1000
800
600
600
400
200
200
A
0
1000
100
200
300
Mehlich 1 (mg Ca/kg)
400
600
0
0
200
200
C
50 100 150 200 250 300
Ammonium acetate (mg Ca/kg)
0
400
7945
x
r 2 =0.75
600
400
100
200
300
Mehlich 3 (mg Ca/kg)
y=1037-
800
400
0
B
1000
50892
y=939x
2
r =0.81
800
0
75243
x
2
r =0.62
y=955-
800
400
0
Seed Ca (mg/kg)
1000
48077
y=859x
2
r =0.78
D
0
10
20
30
40
Sodium nitrate (mg Ca/kg)
50