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Guidelines for Sampling and Interpreting Results

For more details see “Reference Sufficiency Ranges for Plant Analysis in the Southern Region of the United States, SCSB #394, R. Campbell.”

Agronomic Crops

Vegetable Crops

*Numbers reflect computer codes.

Fruit Crops

Ornamentals

Trees

Turf


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. Return to top.

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. Return to top.

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. Return to top.

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 Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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. style="mso-spacerun: yes"> Collect above ground portion of 20 plants. Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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

Themost 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. Return to top.

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

Vegetable Crops

Asparagus (51) – Sample the mature fern from 18-36 inches at mid-growth. Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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) Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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) Return to top.

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. Return to top.

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. Return to top.

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) Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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

Fruit Crops

Apples (80) – Sample 8 to 10 weeks after full bloom.Select leaves from middle of current season’s growth, taking 4 to 8 leaves per tree. style="mso-spacerun: yes"> Collect leaves from 25 trees for each sample. Return to top.

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 season’s growth (lateral shoots, position 4, 5, and 6) during the first two weeks after harvest. Return to top.

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. Return to top.

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) Return to top.

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) Return to top.

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) Return to top.

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. Return to top.

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. Return to top.

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. Return to top.

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 season’s terminal growth from at least 50 trees. Return to top.

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 season’s growth in mid-season. Return to top.

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. Return to top.

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) Return to top.

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) Return to top.

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) Return to top.

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. Return to top.

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

Ornamentals

Azaleas (96) – Sample most recently mature, fully expanded leaves. Return to top.

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. Return to top.

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. style="mso-spacerun: yes"> On pinched plant, sample 5th and 6th leaf pairs from top. Return to 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. Return to top.

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. Return to top.

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. Return to top.

N(%)

K(%)

Ca(%)

Mg(%)

2.10-2.30

4.60-4.90

0.50-0.75

0.41-0.56

Hydrangea (37)

N(%)

P(%)

K(%)

Ca(%)

2.00

1.00-2.50

2.50-12.50

1.00-1.50

Lily (Easter) (39) – Sample most recently mature, fully expanded leaves. Return to top.

N(%)

P(%)

K(%)

Ca(%)

Mg(%)

2.80-4.00

0.10-0.30

1.50-4.10

0.20-2.20

0.20-0.30

Poinsettia (92) – The most recent fully expanded or mature leaf if the best indicator of nutritional status. style="mso-spacerun: yes"> This is the first fully expanded leaf below the growing point.Sampling is initiated as soon as plants are large enough that leaf removal will not limit further development.Sampling is discontinued when bracts near full development. Depending on size, approximately 10-15 leaves are required per sample. Return to top.

N(%)

P(%)

K(%)

Ca(%)

Mg(%)

S(%)

4.00-6.00

0.30-0.60

1.50-3.50

1.00-1.75

0.30-1.00

0.10-0.30

Fe(ppm)

Mn(ppm)

Zn(ppm)

Cu(ppm)

B(ppm)

50-300

25-250

20-60

2-10

25-75

Rhododendron (97) Return to top.

N(%)

P(%)

K(%)

Ca(%)

Mg(%)

1.60-2.10

0.21-0.29

0.40-0.80

0.80-1.40

0.19-0.27

Fe(ppm)

Mn(ppm)

Zn(ppm)

Cu(ppm)

B(ppm)

193-245

602-154

21-37

1-3

33-47

Roses (12) – Sample upper leaves of flowering stem. Return to top.

N(%)

P(%)

K(%)

Ca(%)

Mg(%)

3.00-5.00

0.20-0.30

1.80-3.00

1.00-1.90

0.25-0.35

Fe(ppm)

Mn(ppm)

Zn(ppm)

Cu(ppm)

B(ppm)

50-150

30-250

15-50

5-25

30-60

Snapdragon (41) Return to top.

N(%)

P(%)

K(%)

Ca(%)

4.20-4.90

0.30-0.50

2.20-2.60

1.20-1.40

Trees

Deciduous (18) – Sample young mature leaves at mid-season. Return to top.

N(%)

P(%)

K(%)

Ca(%)

Mg(%)

2.30

0.34

1.41

1.33

0.34

Fe(ppm)

Mn(ppm)

Zn(ppm)

Cu(ppm)

B(ppm)

Al(ppm)

222

130

40

11

36

284

Evergreen (19) – Sample youngest mature leaves of broadleaf plants or 2-3 inches terminal cuttings of narrowleaf evergreens at mid-season. Return to top.

N(%)

P(%)

K(%)

Ca(%)

Mg(%)

2.14

0.35

1.38

0.84

0.26

Fe(ppm)

Mn(ppm)

Zn(ppm)

Cu(ppm)

B(ppm)

Al(ppm)

201

213

54

13

27

241

Fraser Fir (91) – Needles from most recent mature foliage in the upper half of the tree are the best indicator sample.Do not sample needles from the leader or top whorl.For monitoring, the preferred sampling time is in the fall after dormancy. Samples should contain 15-20 laterals from ten or more trees representing the field. Return to top.

N(%)

P(%)

K(%)

Ca(%)

Mg(%)

S(%)

1.50-2.00

0.20-0.60

0.60-0.80

0.45-0.60

0.10-0.20

0.08-0.20

Fe(ppm)

Mn(ppm)

Zn(ppm)

Cu(ppm)

B(ppm)

40-300

30-300

18-75

5-10

18-30

Pine, Loblolly (48) – Foliage samples should be taken in the winter (mid-December to mid-February) from at least 10 dominant trees per stand, south side, upper 1/3 of the crown, from the first flush of growth from a primary lateral branch.

Collect enough to fill an 8x11 paper envelope.Refrigerate until analysis. Return to top.

N(%)

P(%)

K(%)

Ca(%)

Mg(%)

1.10

0.10

0.35

0.12

0.07

Pine, Longleaf (49) - Foliage samples should be taken in the winter (mid-December to mid-February) from at least 10 dominant trees per stand, south side, upper 1/3 of the crown, from the first flush of growth from a primary lateral branch.

Collect enough to fill an 8x11 paper envelope.Refrigerate until analysis. Return to top.

N(%)

P(%)

K(%)

Ca(%)

Mg(%)

0.90

0.08

0.30

0.10

0.06

Turf

Bentgrass (42) – A representative sample of clippings from a freshly mowed green is the best indicator of nutritional status.A double handful of clippings is an adequate sample.The sample should be taken when clippings are free of foreign matter, including sand, pine straw, etc. Return to top.

N(%)

P(%)

K(%)

Ca(%)

Mg(%)

S(%)

4.00-5.00

0.30-0.60

2.20-3.50

0.25-0.75

0.20-0.40

0.20-1.00

Fe(ppm)

Mn(ppm)

Zn(ppm)

Cu(ppm)

B(ppm)

50-300

25-300

20-70

5-15

3-20

 

Bermudagrass (Tifton-328,Tifton-428) (89) – Collect representative samples of clippings after routine mowing. A double handful is an adequate sample size. Return to top.

N(%)

P(%)

K(%)

Ca(%)

Mg(%)

S(%)

3.00-4.00

0.20-0.40

1.80-2.25

0.25-0.50

0.15-0.30

0.15-0.65

Fe(ppm)

Mn(ppm)

Zn(ppm)

Cu(ppm)

B(ppm)

50-250

20-300

15-70

5-20

5-60

Carpetgrass (93) Return to top.

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

Centipede (94) Return to top.

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

Cool Season Grass (38) Return to top.

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

Orchardgrass (32) Return to top.

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

4-10

5-15

St. Augustine (35) Return to top.

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

4-10

5-15

Zoysia (36) Return to top.

P(%)

K(%)

Ca(%)

Mg(%)

0.11-0.39

0.38-1.51

0.31-0.54

0.11-0.25