Agricultural Service Laboratory
Plant Tissue Analysis
Clemson Extension
Guidelines for Sampling and Interpreting Results
April 16, 2001
For more details see Reference Sufficiency Ranges for Plant Analysis in the Southern Region of the United States, SCSB #394, R. Campbell at http://www.agr.state.nc.us/agronomi/saaesd/s394.htm
Alfalfa (50)
Bahiagrass (33)
Coastal Bermuda Hay (34)
Canola (02)
Corn - below whorl & ear leaf at tasseling (21)
Corn whole top up to 4 (20)
Cotton early bloom (01)
Cotton Petiole (00)
Fescue (31)
Grain Sorghum flowering (25)
Orchardgrass (32)
Peanuts (08)
Small Grain seedling to flag leaf emergence (29)
Soybeans flowering (04)
Asparagus (51)
Beets (60)
Broccoli heading (61)
Brussel Sprouts (43)
Cabbage (62)
Carrots 60 days after seeding (63)
Cauliflower at buttoning (79)
Celery (03)
Collards (64)
Cucumbers (53)
Cucumbers, Greenhouse (76)
Eggplant (65)
Green beans (44)
Kale (66)
Lettuce (54)
Lettuce, Greenhouse (75)
Muskmelon (40)
Onions, Vidalia (68)
Peas (45)
Peppers, Bell prior to blossoming (69)
Potato, Irish (95)
Snap Beans (57)
Spinach (71)
Spinach, Greenhouse (41)
Squash (58)
Sweet Corn (46)
Tomatoes, Greenhouse (78)
Tomatoes, Trellis (77)
Turnips (72)
Watermelon (59)
Apples (80)
Blueberries rabbiteye (82)
Cherry, sour (13)
Cherry, sweet (14)
Figs (83)
Grape, bunch (petiole) (47)
Kiwi (06)
Muscadine grapes (84)
Peaches (86)
Pears (81)
Pecans (88)
Plums (87)
Prune (16)
Raspberry (17)
Strawberries (74)
Azaleas (96)
Cabbage, Ornamental (15)
Carnations (22)
Chrysanthemum (23)
Geranium (24)
Gladiola (30)
Hydrangea (37)
Lily (Easter) (39)
Poinsettia (92)
Rhododendron (97)
Roses (12)
Snapdragon (41)
Deciduous (18)
Evergreen (19)
Fraser Fir (91)
Pine, Loblolly (48)
Pine, Longleaf (49)
Bentgrass (42)
Bermudagrass (89)
Carpetgrass (93)
Centipede (94)
CoolSeason Grass (38)
Orchardgrass (32)
St. Augustine (35)
Zoysia (36)
Reference Sufficiency Ranges
Agronomic Crops
Alfalfa (50) Sample the top 4 to 6 inches of the plant prior to or at 1/10 bloom stage.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
3.00-5.00 |
0.25-0.70 |
2.00-3.50 |
0.80-3.00 |
0.25-1.00 |
0.25-0.50 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
30-250 |
25-100 |
20-70 |
4-30 |
20-80 |
|
Bahiagrass (33) Sample top 4-6 inches of plant. Take leaves from 50 plants for one sample.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
2.00-2.60 |
0.23-0.40 |
1.20-2.00 |
0.25-0.50 |
0.10-0.25 |
0.15-0.25 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
50-200 |
20-300 |
20-70 |
4-20 |
5-15 |
|
Coastal Bermuda (34) Sample the upper half of the plant prior to seed head formation.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
2.00-2.60 |
0.20-0.40 |
1.50-2.30 |
0.25-0.50 |
0.10-0.25 |
0.15-0.25 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
50-200 |
20-300 |
15-70 |
4-20 |
5-15 |
|
Canola (02) Sample the uppermost recently mature leaf blades prior to flowering
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
4.00-6.00 |
0.42-0.69 |
3.50-5.10 |
2.10-3.00 |
0.15-0.62 |
0.65-0.90 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
100+ |
30-250 |
33-49 |
5-25 |
25-54 |
|
Corn (20) Seedling (<4 inches in height)
Whole plant should be collected by cutting 1 inch above the soil surface. Depending on size, 15 to 20 plants are adequate for a sample.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
4.00-5.00 |
0.40-0.60 |
3.00-4.00 |
0.30-0.80 |
0.20-0.60 |
0.18-0.50 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
40-250 |
25-160 |
20-60 |
6-20 |
5-25 |
|
Corn (21) Tasseling/Bloom
The earleaf is the best indicator sample. This is the leaf adjacent to the uppermost developing ear. Ten leaves are adequate for a sample.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
2.80-4.00 |
0.25-0.50 |
1.80-3.00 |
0.25-0380 |
0.15-0.60 |
0.15-0.60 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
30-250 |
15-150 |
20-70 |
5-25 |
5-25 |
|
Cotton (01) Leaf blade at early bloom
Sample the uppermost, mature cotton leaf blade on the vegetative stem. Discard the petiole. (Note: some research has included both leaf blade and petiole.) This is usually the 3rd to 5th leaf from the terminal. Sample during the period of one week before to one week after first bloom.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
3.00-4.50 |
0.20-0.65 |
1.50-3.00 |
2.00-3.50 |
0.30-0.90 |
0.25-0.80 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
50-250 |
25-350 |
20-200 |
5-25 |
20-80 |
|
Fescue, Tall (31) Samples should be collected every five to six weeks during growing season before flowering. Collect above ground portion of 20 plants.
|
N(%) |
P(%) |
K(%) |
|
|
|
|
2.80-3.80 |
0.26-0.40 |
2.50-3.50 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Grain Sorghum (25) Flowering or at Heading
Sample second leaf from the top of the plant. This is the recommended sampling procedure when determining the nutrient status of the treatments and yield.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
2.50-4.00 |
0.20-0.35 |
1.40- |
0.30-0.60 |
0.20-0.50 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
65-100 |
8-100 |
12-100 |
2-7 |
1-10 |
|
Orchardgrass (32) Sample top 4-6 inches of plant. Take leaves from 50 plants for one sample.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
2.00-2.60 |
0.23-0.40 |
1.20-2.00 |
0.25-0.50 |
0.10-0.25 |
0.15-0.25 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
50-200 |
20-300 |
20-700 |
4-20 |
5-15 |
|
Peanut (08) All Growth Stages
The most recent mature trifoliate is the best indicator sample. A total of 15 to 20 trifoliates are required for a representative sample.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
3.50-4.50 |
0.20-0.50 |
1.70-3.00 |
0.50-2.00 |
0.30-0.80 |
0.20-0.35 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
50-250 |
20-350 |
20-60 |
5-20 |
20-60 |
|
Small Grain (Barley, Oats, Rye, Wheat) (29) Seedling to Tillering
Whole plants should be collected by cutting 1 inch above the soil surface. After collecting subsamples from several locations in a field, clippings should be combined for a representative sample.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
4.00-5.00 |
0.20-0.50 |
2.50-5.00 |
0.20-1.00 |
0.14-1.00 |
0.15-0.65 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
30-200 |
20-150 |
18-70 |
4.5-15 |
1.5-4 |
|
Soybean (04) Flowering
The most recently matured leaf blades are collected for subsequent analysis.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
3.25-5.00 |
0.30-0.60 |
1.50-2.25 |
0.80-1.40 |
0.25-0.70 |
0.25-0.60 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
25-300 |
17-100 |
21-80 |
4-30 |
20-60 |
|
Tobacco (99) Flowering
The most recent mature of fully expanded leaf is the best indicator of nutritional status. This is the first leaf back from the growing point that is fully developed generally the 4th or 5th leaf back from the bud.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
3.50-4.50 |
0.20-0.50 |
2.50-3.50 |
0.75-1.50 |
0.20-0.60 |
0.15-0.60 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
30-300 |
20-250 |
20-60 |
5-10 |
18-75 |
|
Asparagus (51) Sample the mature fern from 18-36 inches at mid-growth.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
2.40-3.80 |
0.20-0.35 |
1.50-2.40 |
0.40-0.50 |
0.15-0.20 |
|
|
|
Mn(ppm) |
Zn(ppm) |
|
B(ppm) |
|
|
|
10-160 |
20-60 |
|
50-100 |
|
Beets (60) Sample the young mature leaf at mid-growth. Take 3 leaves per plant.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
3.50-5.00 |
0.20-0.30 |
2.00-4.00 |
2.50-3.50 |
0.30-0.80 |
|
|
|
Mn(ppm) |
Zn(ppm) |
|
B(ppm) |
|
|
|
70-200 |
15-30 |
|
60-80 |
|
Broccoli (61) Heading
The most recently matured leaves should be sampled at heading.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
3.00-4.50 |
0.30-0.50 |
1.50-4.00 |
1.20-2.50 |
0.23-0.40 |
0.20 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
40-300 |
25-150 |
45-90 |
5-10 |
30-50 |
|
Brussel Sprouts (43) Sample the young mature leaf at mid-growth. Take 3 leaves per plant.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
2.20-4.20 |
0.26-0.45 |
2.40-3.40 |
0.30-2.20 |
0.23-0.40 |
|
|
|
|
|
|
B(ppm) |
|
|
|
|
|
|
30-80 |
|
Cabbage (62) Sample the young wrapper leaf at head half grown. Take 2 leaves per plant.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
3.00-4.00 |
0.30-0.50 |
3.00-4.00 |
1.50-3.50 |
0.25-0.45 |
|
|
Fe(ppm) |
|
Zn(ppm) |
|
B(ppm) |
|
|
30-60 |
|
20-30 |
|
30-60 |
|
Carrot (63) 60 days after seeding.
The most recently mature leaf should be sampled about 60 days after planting.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
1.80-2.50 |
0.20-0.40 |
2.00-4.00 |
2.00-3.50 |
0.20-0.50 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
30-600 |
30-60 |
20-60 |
4-10 |
20-40 |
|
Cauliflower (79) Buttoning
The most recently matured leaf should be sampled at buttoning to determine if nutrition is adequate for the growing season.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
3.00-5.00 |
0.40-0.70 |
2.00-4.00 |
0.80-2.00 |
0.25-0.60 |
0.60-1.00 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
30-600 |
30-80 |
30-50 |
5-10 |
30-50 |
|
Celery (03) The outer petiole should be sampled about 6 weeks after transplanting.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
1.50-1.70 |
0.30-0.60 |
6.00-8.00 |
1.30-2.00 |
0.30-0.60 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
20-300 |
5-10 |
20-40 |
4-6 |
15-25 |
|
Collards (64) Sample young mature leaf at mid-growth. Take 3 leaves per plant.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
|
|
|
4.00-5.00 |
0.30-0.60 |
3.00-4.00 |
3.00-4.00 |
|
|
|
|
|
|
|
B(ppm) |
|
|
|
|
|
|
50-80 |
|
Cucumber (53) The most recent mature or fully expanded leaf is the best indicator sample for all growth stages. This is generally the 4th or 5th leaf from a growing point.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
4.00-5.00 |
0.30-1.00 |
3.00-4.00 |
1.20-2.00 |
0.25-1.00 |
0.20-0.75 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
50-300 |
25-250 |
20-200 |
5-60 |
25-85 |
|
Cucumber, Greenhouse (76) The most recent mature or fully expanded leaf is the best indicator sample for all growth stages. This is generally the 3rd or 4th leaf from the growing point.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
4.50-6.00 |
0.30-0.70 |
3.50-4.50 |
1.20-1.50 |
0.45-0.75 |
0.20-0.70 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
50-300 |
20-300 |
20-70 |
5-35 |
25-85 |
|
Eggplant (65)
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
4.00-6.00 |
0.30-1.20 |
3.50-5.00 |
1.00-2.50 |
0.30-1.00 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
50-300 |
40-250 |
20-250 |
8-60 |
20-75 |
|
Green Beans (44) Sample the uppermost mature leaves prior to or at early bloom. Take 3 leaves per plant.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
3.00-6.00 |
0.25-0.50 |
1.80-2.50 |
0.80-3.00 |
0.25-0.70 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
300-450 |
30-300 |
30-60 |
15-30 |
40-60 |
|
Kale (66) Sample young mature leaf at mid-growth. Take 3 leaves per plant.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
|
|
|
4.00-5.00 |
0.30-0.60 |
3.00-4.00 |
3.00-4.00 |
|
|
|
|
|
|
|
B(ppm) |
|
|
|
|
|
|
50-80 |
|
Lettuce (54) Sample mature bottom leaves near base of plant of mid-growth.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
2.50-4.00 |
0.20-15.0 |
3.50-14.00 |
1.30-4.00 |
0.30-0.80 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
Al |
|
100-800 |
30-400 |
30-200 |
5-30 |
18-150 |
<800 |
Lettuce, Greenhouse (75) The most recent mature or fully expanded leaf is the best indicator sample for all growth stages. This is generally the 3rd or 4th leaf from the growing point.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
4.50-6.50 |
0.30-0.80 |
6.00-10.00 |
1.00-2.00 |
0.35-0.75 |
0.20-0.60 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
50-200 |
20-200 |
20-75 |
5-15 |
25-80 |
|
Muskmelon (40) 12-inch Vines
The most recently matured leaf should be sampled when the vines are about 12 inches long.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
4.00-5.00 |
0.40-0.70 |
5.00-7.00 |
3.00-5.00 |
0.35-0.45 |
0.20+ |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
40-100 |
20-100 |
20-60 |
5-10 |
20-80 |
|
Onion, Vidalia (68) Sample the most recently mature leaves prior to root or bulb enlargement.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
3.10-4.27 |
0.26-0.48 |
1.98-4.22 |
0.90-1.84 |
0.16-0.32 |
0.15-0.57 |
|
|
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
|
51-149 |
16-45 |
5-28 |
6-15 |
|
Peas (45) Sample entire top growth; bud to full bloom.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
3.10-3.60 |
0.30-0.35 |
2.20-2.80 |
1.20-1.50 |
0.27-0.35 |
|
|
|
|
|
|
B(ppm) |
|
|
|
|
|
|
20-60 |
|
Pepper, Bell (69) Prior to Blossoming
The most recent mature leaf should be sampled.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
4.00-5.00 |
0.30-0.50 |
5.00-6.00 |
0.90-1.50 |
0.35-0.60 |
0.30-0.60 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
20-150 |
30-100 |
25-80 |
5-10 |
20-50 |
|
Potatoes, Irish (95) Sample young mature leaf; tubers half grown. Take 3 leaves per plant.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
3.00-5.00 |
0.20-0.40 |
4.00-8.00 |
2.00-4.00 |
0.50-0.80 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
|
B(ppm) |
|
|
70-150 |
30-500 |
20-40 |
|
40-60 |
|
Snap Beans (57)
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
5.00-6.00 |
0.35-0.75 |
2.25-4.00 |
1.50-2.50 |
0.30-1.00 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
50-300 |
50-300 |
20-200 |
7-30 |
20-75 |
|
Spinach (71) Sample young mature leaf at mid-growth. Take 2 leaves per plant.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
4.00-6.00 |
0.30-0.50 |
3.00-4.00 |
1.60-1.80 |
0.60-1.00 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
220-245 |
30-60 |
50-75 |
5-7 |
40-60 |
|
Spinach, Greenhouse (41) The most recent mature or fully expanded leaf is the best indicator sample for all growth stages. This is generally the 3rd or 4th leaf from the growing point.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
4.00-6.00 |
0.30-0.50 |
3.00-8.00 |
1.00-1.50 |
0.40-1.00 |
0.20-0.80 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
50-200 |
25-200 |
20-75 |
5-15 |
25-60 |
|
Squash (58)
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
4.00-6.00 |
3.00-5.00 |
3.00-5.00 |
1.20-2.50 |
0.30-1.00 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
50-200 |
50-250 |
20-200 |
10-25 |
25-75 |
|
Sweet Corn (46) Sample 4th leaf from tip at mid-growth.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
2.60-3.50 |
0.20-0.30 |
1.80-2.50 |
0.20-0.30 |
0.15-0.30 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
50-250 |
20-300 |
20-60 |
5-20 |
5-30 |
|
Tomatoes, Greenhouse (78) The most recent mature or fully expanded leaf is the best indicator sample for all growth stages. This is generally the 4th or 5th leaf from the growing point.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
3.50-5.00 |
0.30-0.65 |
3.50-4.50 |
1.00-3.00 |
0.35-1.00 |
0.20-1.00 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
50-300 |
25-200 |
18-80 |
5-35 |
30-75 |
|
Tomatoes, Trellis (77) The most recent mature or fully expanded leaf is the best indicator sample. This is generally the 4th or 5th leaf from the growing point.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
3.50-5.00 |
0.30-0.70 |
3.00-4.50 |
1.00-2.00 |
0.30-0.80 |
0.20-0.80 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
45-300 |
30-300 |
18-75 |
5-30 |
30-75 |
|
Turnips (59) Sample young mature leaf at mid-season. Take 3 leaves per plant.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
2.00-3.00 |
0.20-0.30 |
2.20-3.50 |
1.10-2.50 |
0.25-0.50 |
|
|
|
|
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
|
|
20-50 |
4-8 |
20-40 |
|
Watermelon (59) At flower start or initial fruit set. Sample the most recently mature leaves closest to the growing tip. Sample 12-20 leaves, including the petiole.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
2.50-4.00 |
0.25-0.7 |
2.25-3.50 |
1.10-2.50 |
0.25-0.50 |
0.20-0.40 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
30-200 |
20-200 |
20-50 |
4-10 |
20-40 |
|
Apples (80) Sample 8 to 10 weeks after full bloom. Select leaves from middle of current seasons growth, taking 4 to 8 leaves per tree. Collect leaves from 25 trees for each sample.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
2.10-2.40 |
0.15-0.50 |
1.25-3.00 |
1.00-2.00 |
0.20-0.50 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
50-400 |
20-200 |
15-80 |
5-20 |
30-60 |
|
Blueberry, Rabbiteye (82) Take mature leaves from mid-portion of current seasons growth (lateral shoots, position 4, 5, and 6) during the first two weeks after harvest.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
1.20-1.70 |
0.08-0.20 |
0.35-0.60 |
0.25-0.70 |
0.14-0.20 |
0.11-0.25 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
25-700 |
25-100 |
10-25 |
2-10 |
12-35 |
|
Cantaloupe (52) Sample the mature leaf near tip prior to or at initial fruit set. Take 3 leaves per plant.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
2.00-3.00 |
0.25-0.40 |
1.80-2.50 |
5.00-7.00 |
1.00-1.50 |
|
|
|
|
Zn(ppm) |
|
B(ppm) |
|
|
|
|
30-500 |
|
30-80 |
|
Cherry, Sour (13)
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
3.16 |
0.27 |
2.11 |
1.12 |
0.41 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
Al(ppm) |
|
184 |
81 |
33 |
24 |
33 |
161 |
Cherry, Sweet (14)
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
2.63 |
0.19 |
1.42 |
1.55 |
0.39 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
Al(ppm) |
|
128 |
101 |
20 |
30 |
10 |
116 |
Figs (83)
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
2.00-2.50 |
0.10-0.30 |
>1.00 |
>3.00 |
>0.75 |
|
|
|
Mn(ppm) |
|
Cu(ppm) |
|
|
|
|
>20 |
|
>4 |
|
|
Grape, Bunch (47) Sample 4 to 8 weeks after peak bloom. Collect the petioles from mature leaves or nodes just beyond the fruiting clusters.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
0.81 |
0.31 |
2.00 |
1.66 |
0.41 |
|
|
Fe(ppm) |
Mn(ppm) |
|
Cu(ppm) |
B(ppm) |
|
|
39 |
540 |
|
39 |
28 |
|
Kiwi (06) Uniformly select 24 leaves from over the growing unit. Take the first leaf from above the fruit spur on the lateral growth. This fruiting spur should contain at least six leaves beyond the one selected and the fruit load should be a normal cluster of 3-6 average sized fruit. Samples should be taken in late February. Sample the youngest mature leaves.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
2.37-2.58 |
0.17-0.23 |
1.54-1.87 |
3.11-3.84 |
0.40-0.51 |
0.33-0.44 |
|
|
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
|
104-190 |
15-22 |
5-15 |
31-42 |
|
Muscadine Grapes (84) Sample the most recent mature leaves adjacent to fruit clusters taken in mid to late summer, but before final swelling of the fruit.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
1.65-2.15 |
0.12-0.18 |
0.80-1.20 |
0.70-1.10 |
0.15-0.25 |
0.15-0.60 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
60-120 |
60-150 |
18-35 |
5-10 |
15-25 |
|
Peaches (86) At mid-season, sample mature leaves from the mid-portion or near the base of the current seasons terminal growth from at least 50 trees.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
2.75-3.50 |
0.12-0.30 |
1.30-3.20 |
1.50-2.50 |
0.25-0.50 |
0.12-0.40 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
>60 |
>20 |
20-50 |
5-20 |
20-80 |
|
Pears (81) Sample 50 healthy, mid-terminal leaves on current seasons growth in mid-season.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
1.80-2.50 |
0.12-0.30 |
1.00-2.00 |
1.00-2.00 |
0.25-0.50 |
0.10-0.30 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
30-150 |
20-200 |
20-50 |
5-20 |
20-60 |
|
Pecans (88) Sample the middle pair of leaflets from the midportion of terminal growth 56 to 84 days after catkin fall.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
2.50-3.30 |
0.12-0.30 |
0.75-2.50 |
0.70-1.75 |
0.30-0.60 |
0.20-0.50 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
50-300 |
100-800 |
50-100 |
6-30 |
15-50 |
|
Plums (87)
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
2.40-3.00 |
0.14-0.25 |
1.60-3.00 |
1.50-3.00 |
0.30-0.80 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
100-250 |
40-160 |
20-50 |
6-16 |
25-60 |
|
Prune (16)
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
3.13 |
0.29 |
2.81 |
1.10 |
0.33 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
Al(ppm) |
|
166 |
82 |
46 |
15 |
42 |
167 |
Raspberry (17)
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
2.45 |
0.23 |
1.75 |
1.35 |
0.45 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
Al(ppm) |
|
215 |
422 |
42 |
33 |
48 |
220 |
Strawberries, Annual Hill Culture (74) The most recent mature trifoliate and petiole are the best indicator samples. Concentrations of essential elements are determined on the trifoliate. Nitrate nitrogen is determined on the petioles.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
3.00-4.00 |
0.20-0.40 |
1.10-2.50 |
0.50-1.50 |
0.25-0.45 |
0.15-0.40 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
50-300 |
30-300 |
15-60 |
3-15 |
25-50 |
|
Azaleas (96) Sample most recently mature, fully expanded leaves.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
1.70-2.30 |
0.16-0.50 |
0.70-1.00 |
0.16-0.30 |
0.08-0.33 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
Al(ppm) |
|
74 |
53 |
95 |
10 |
35 |
74 |
Cabbage, Ornamental (15) The most recent mature leaf is the best indicator. 10-15 leaves are required for a representative sample. Samples are collected during vegetative growth as soon as plants are large enough.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
S(%) |
|
3.50-4.50 |
0.20-0.60 |
3.00-4.00 |
0.50-1.00 |
0.20-0.40 |
0.20-1.00 |
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
50-300 |
20-250 |
20-75 |
3-10 |
20-40 |
|
Carnations (22) On young plants, sample 4th and 5th leaf pairs from base before noon. On pinched plant, sample 5th and 6th leaf pairs from top.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
3.00-5.00 |
0.20-0.45 |
2.00-6.00 |
0.60-2.00 |
0.15-0.60 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
125+ |
30-300 |
15-75 |
5-30 |
25-400 |
|
Chrysanthemum (23) Sample upper leaves of a flowering stem.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
4.50-6.00 |
0.20-1.10 |
3.50-10.00 |
0.50-4.60 |
0.14-1.50 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
125+ |
200+ |
7-35 |
5-50 |
20-200 |
|
Geranium (24) Sample most recently mature, fully expanded leaves.
|
N(%) |
P(%) |
K(%) |
Ca(%) |
Mg(%) |
|
|
3.50-4.80 |
0.20-0.65 |
1.00-4.30 |
0.50-1.20 |
0.20-0.50 |
|
|
Fe(ppm) |
Mn(ppm) |
Zn(ppm) |
Cu(ppm) |
B(ppm) |
|
|
158 |
42-135 |
8-25 |
7-16 |
30-280 |
|
Gladiolus (30) Sample most recently mature, fully expanded leaves.
|
N(%) |
|
K(%) |
Ca(%) |
Mg(%) |
|
|
2.10-2.30 |
|
4.60-4.90 |
0.50-0.75 |
0.41-0.56 |
|