Table 23. Guide to Interpreting TAEX Soil Test Results
ELEMENT CROP ELEMENT RATINGS (ppm) V. LOW LOW MODERATE HIGH V. HIGH NITROGEN ALL
0-5
6-25
26-50
51-80
PHOSPHORUS ALL
0-5
6-10
11-20
21-40
>40
POTASSIUM ALL
0-69
70-299
300-419
420+
>300
CALCIUM ALL
0-179
*180-459
460-749
750-3560
>3560
SODIUM ALL
0-98
99-399
400-999
*1000-3000
>3000
MAGNESIUM ALL
0-49
*50-99
100-150
>150
---------
SULFUR ALL
0-7.99
8.00-15.99
16.00-24.99
*>25.00
---------
MANGANESE ALL
-------
0-0.10
*1.00-1.49
>1.50
---------
COPPER ALL
-------
0-0.10
0.11-0.15
>0.16
---------
BORON ALL
-------
0-0.39
*0.40-0.59
>0.60
---------
IRON ALL
-------
0-3.19
3.20-4.19
*>4.20
---------
ZINC CORN
-------
0-0.30
0.31-0.80
*>0.81
---------
NONE SLIGHT MODERATE HIGH V. HIGH SALINITY ALL
0-600
601-1200
1201-2000
2001-3000
>3000
* Indicates the soil test level at which addition of a nutrient is suggested or a comment statement is generated.
Reference, Soil, Plant and Water Testing Laboratory - Texas Agricultural Extension Service.Predicted crop response to fertilizer where soil test indicates element to be:
Very high = no crop response; High = no crop response; Medium = 75 - 100 % of maximum expected yield predicted without fertilization; Low = 50 - 75 % of maximum expected yield predicted without fertilization; Very low = 25 - 50 % of maximum expected yield predicted without fertilization;
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