Grapes
Nutrient composition of grape petioles
| Element |
Deficient
|
Normal
|
Excess
|
| Nitrogen (NO3-N) (ppm) |
350
|
600 - 1200
|
1800
|
| Phosphorus (P) (%) |
0.15 - 0.20
|
0.30 - 0.60
|
|
| Potassium (K) (%) |
1.00
|
1.00 - 1.20
|
3.00
|
| Magnesium (Mg) (%) |
0.30
|
0.50 - 0.80
|
1.00
|
| Zinc (Zn)
(ppm) |
15
|
25 - 50
|
|
| Boron (B)
(ppm) |
25
|
40 - 60
|
300
|
| Chloride (Cl)
(%) |
|
0.05 - 0.15
|
0.50
|
Source of information: Mielke, Eugene A., et. al. 1980.
Grape and Wine Production in the Four Corners Region. Technical Bulletin
239. University of Arizona, Agricultural Experiment Station. p. 54.
Nutrient composition of grape petioles for Thompson Seedless
(Petioles taken from opposite clusters at full bloom)
| Element |
Deficient
|
Questionable
|
Adequate
|
Excessive
|
Possibly toxic
|
Nitrogen (NO3-N)
(ppm) |
< 350
|
350 - 500
|
500 - 1200
|
> 2000
|
> 3000
|
| Phosphorus (P) (%) |
< 0.10
|
0.10 - 0.15
|
> 0.15
|
|
|
| Potassium (K) (%) |
< 1.00
|
1.00 - 1.50
|
> 1.50
|
|
|
| Magnesium (Mg) (%) |
< 0.20
|
0.20 - 0.30
|
> 0.30
|
|
|
Zinc (Zn)
(ppm) |
< 15
|
15 - 26
|
> 26
|
|
|
| Manganese (Mn) (ppm) |
< 20
|
20 - 25
|
> 25
|
|
|
Boron (B) *
(ppm) |
< 25
|
26 - 30
|
> 30
|
|
100 -150
|
Chloride (Cl) **
(%) |
|
|
|
|
> 0.5 at bloom
|
Sodium (Na)
(%) |
|
|
|
> 0.5
|
***
|
* Toxic level for Boron is over 300 ppm in blades.
** Toxic level for Chloride is over 1.0 in midsummer and late
summer and over 0.5 % in blades.
***Possible problem over 0.25 % in blades. Associated with Chloride
problems.
Source of information: Christensen, L. Peter, et. al. 1978.
Grapevine Nutrition and Fertilization in the San Joaquin Valley.
Agricultural Sciences Publications, Division of Agricultural Sciences,
Berkeley, California 94720.