Sufficiency
Ranges
The
following tables are based on data presented in Soil Testing and Plant
Analysis Edited by Leo M. Walsh and James D. Beaton, published by
Soil Science Society of America, Madison, Wisconsin, 1973.
Sufficiency
ranges for soybean leaves, based on data from Ohio State University
Plant Analysis Laboratory, 1971.
|
Element
Sufficiency Range
|
N,
%
|
4.26
- 5.50
|
P,
%
|
0.26
- 0.50
|
| K,
% |
1.71
- 2.50
|
| Ca,
% |
0.36 - 2.00
|
Mg,
%
|
0.26
- 1.00
|
| Mn,
ppm |
21
- 100
|
| Fe,
ppm |
51
- 350
|
| B,
ppm |
21
- 55
|
| Cu,
ppm |
10
- 30
|
| Zn,
ppm |
21 - 50
|
| Mo,
ppm |
1 - 5
|
Sufficiency
ranges reported for corn:
|
Element
Sufficiency Range
|
N,
%
|
2.6
- 5.0
|
P,
%
|
0.25
- 0.8
|
| K,
% |
1.7
- 5.0
|
| Ca,
% |
0.21 - 1.6
|
Mg,
%
|
0.21
- 0.8
|
| S,
% |
0.2 - 0.5
|
| Al,
ppm |
0
- 200
|
| B,
ppm |
6
- 20
|
| Cu,
ppm |
6
- 20
|
| Fe,
ppm |
21 - 300
|
| Mn,
ppm |
20 - 200
|
| Mo,
ppm |
0.6 - 1.0
|
| Zn,
ppm |
20 - 150
|
Sufficiency
ranges reported for small grains:
|
Element
Sufficiency Range
|
N,
%
|
1.25
- 3.0
|
P,
%
|
0.15
- 0.50
|
| K,
% |
1.25
- 3.0
|
| Ca,
% |
0.2 - 1.2
|
Mg,
%
|
0.15
- 0.50
|
| S,
% |
0.15 - 0.40
|
| Cu,
ppm |
5
- 25
|
| Mn,
ppm |
5 - 100
|
| Zn,
ppm |
15 - 70
|
Sufficiency
ranges reported for cotton:
|
Element
Sufficiency Range
|
N,
%
|
3.0
- 4.5
|
P,
%
|
0.30
- 0.65
|
| K,
% |
0.9
- 3.0
|
| Ca,
% |
1.90 - 3.50
|
Mg,
%
|
0.30
- 0.90
|
| B,
ppm |
20 - 60
|
| Cu,
ppm |
8
- 20
|
| Fe,
ppm |
30 - 300
|
| Mn,
ppm |
30 - 350
|
| Zn,
ppm |
20 - 100
|
|