|
Success Stories - Alfalfa
Alfalfa - Orland, California
  |
|
| |
CEC
|
Ca%
|
Mg%
|
P
|
K
|
| 0-6" |
12.8
|
68
|
21
|
+15
|
-162
|
| 6-12" |
13.8
|
58
|
30
|
-38
|
-260
|
|
|
| 0-6" |
12.7
|
68
|
21
|
-44
|
-188
|
| 6-18" |
17.4
|
47
|
43
|
-129
|
-355
|
|
|
| 0-6" |
16.5
|
59
|
31
|
-128
|
-259
|
| 6-18" |
22.6
|
46
|
44
|
-171
|
-376
|
|
| Yield
for Above Image |
| Area |
Plant
Height
|
Avg. Plant
Population/
4 sq. ft.
|
Green Wt.
(lbs./sq. ft.)
|
% of
Top Yield
|
| Green |
36"
|
36.5
|
0.127
|
100
|
| Yellow |
32"
|
38.5
|
0.107
|
84
|
| Yellow-Brown |
22"
|
42.5
|
0.064
|
50
|
| Brown |
16"
|
35.5
|
0.030
|
24
|
| Note: If the green area's yield at
100% was 2.0 ton, then the field average was 1.5 ton. That's
a 0.5 ton difference per cutting that is lost in yield potential. |
| Other
Calcium, Magnesium Levels in Relation to Yield - 2000 Crop |
| Area - Crop |
Yield
|
CEC
|
Ca%
|
Mg%
|
Na%
|
| Kerman - Raisins |
4.75 tons
|
6.67
|
69.6
|
15.0
|
4.3
|
| Blythe - Cotton |
5.6 bales
|
23.75
|
71.2
|
20.2
|
3.2
|
| Note: One thing that all of these fields
have in common is that their Ca:Mg ratios are close to ideal. |
| Soil
Sample Data Based on Veris Management Zones |
|
| Electroconductivity |
Low
|
Medium
|
High
|
| CEC |
22.68
|
24.08
|
27.16
|
| Ca% |
74.55
|
66.98
|
64.73
|
| Mg% |
13.60
|
15.96
|
19.42
|
| K% |
4.88
|
3.01
|
3.03
|
| Na% |
2.87
|
3.26
|
5.22
|
| Note: Notice that the Veris data accurately
separated the field into zones based on CEC. Also notice how
Ca% drops and Mg% increases as CEC increases. The K% also
becomes inverted with Na% (not good) as the CEC increases.
|
To learn more about how Helena can identify ideal
calcium and magnesium levels for your crops, contact your local
Helena Sales Representative.
|
