Plant Tissue Sampling Guidelines and Mineral Sufficiency Ranges for Agronomic Crops

ALFALFA

Sampling Guidelines: Top 6 inches of plant prior to blooming.

Sufficiency Ranges
----------%----------

N P K Ca Mg S

3.00-5.50 0.26-0.70 1.75-3.50 1.00-3.00 0.30-1.00 0.20-0.50

----------ppm----------

Zn Cu Mn Fe B

20-80 5-20 30-200 30-250 20-80

Sufficiency Ranges
----------%----------
N	P	K	Ca	Mg	S
3.00-5.50	0.26-0.70	1.75-3.50	1.00-3.00	0.30-1.00	0.20-0.50

----------ppm----------
Zn	Cu	Mn	Fe	B
20-80	5-20	30-200	30-250	20-80

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CORN (Young Plants)

Sampling Guidelines: Whole top up to 12 inches.

Sufficiency Ranges
----------%----------

N P K Ca Mg S

3.50-5.00 0.30-0.50 2.40-4.00 0.30-0.70 0.15-0.45 0.20-0.50

----------ppm----------

Zn Cu Mn Fe B

20-60 5-20 20-300 50-250 5-25

Sufficiency Ranges
----------%----------
N	P	K	Ca	Mg	S
3.50-5.00	0.30-0.50	2.40-4.00	0.30-0.70	0.15-0.45	0.20-0.50

----------ppm----------
Zn	Cu	Mn	Fe	B
20-60	5-20	20-300	50-250	5-25

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CORN (Mature Plants)

Sampling Guidelines: Leaves below whorl and ear leaf at silking.

Sufficiency Ranges
----------%----------

N P K Ca Mg S

2.80-3.20 0.25-0.45 1.75-2.25 0.25-0.50 0.12-0.30 0.15-0.50

----------ppm----------

Zn Cu Mn Fe B

15-60 3-15 15-300 30-200 4-25

Sufficiency Ranges
----------%----------
N	P	K	Ca	Mg	S
2.80-3.20	0.25-0.45	1.75-2.25	0.25-0.50	0.12-0.30	0.15-0.50

----------ppm----------
Zn	Cu	Mn	Fe	B
15-60	3-15	15-300	30-200	4-25

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COTTON

Sampling Guidelines: Top mature leaves on vegetative stem sampled in June or July.

Sufficiency Ranges
----------%----------

N P K Ca Mg S

3.50-4.50 0.30-0.50 1.50-3.00 2.00-3.00 0.30-0.90 0.25-0.80

----------ppm----------

Zn Cu Mn Fe B

20-200 5-25 25-300 50-250 20-80

Sufficiency Ranges
----------%----------
N	P	K	Ca	Mg	S
3.50-4.50	0.30-0.50	1.50-3.00	2.00-3.00	0.30-0.90	0.25-0.80

----------ppm----------
Zn	Cu	Mn	Fe	B
20-200	5-25	25-300	50-250	20-80

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FORAGE GRASSES

Sampling Guidelines: Top 4 to 6 inches of the plant.

Sufficiency Ranges
----------%----------

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

----------ppm----------

Zn Cu Mn Fe B

20-70 4-20 20-300 50-200 5-15

Sufficiency Ranges
----------%----------
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

----------ppm----------
Zn	Cu	Mn	Fe	B
20-70	4-20	20-300	50-200	5-15

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PEANUTS

Sampling Guidelines: Top mature leaves sampled in June or July.

Sufficiency Ranges
----------%----------

N P K Ca Mg S

3.00-4.50 0.25-0.50 1.70-3.00 1.25-2.00 0.30-0.80 0.20-0.35

----------ppm----------

Zn Cu Mn Fe B

20-60 50-350 50-300 20-60

Sufficiency Ranges
----------%----------
N	P	K	Ca	Mg	S
3.00-4.50	0.25-0.50	1.70-3.00	1.25-2.00	0.30-0.80	0.20-0.35

----------ppm----------
Zn	Cu	Mn	Fe	B
20-60		50-350	50-300	20-60

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SMALL GRAINS

Sampling Guidelines: Top 6 inches of plant leaves prior to heading.

Sufficiency Ranges
----------%----------

N P K Ca Mg S

2.00-3.00 0.20-0.40 1.50-3.00 0.20-0.50 0.15-0.50 0.18-0.50

----------ppm----------

Zn Cu Mn Fe B

20-70 5-25 25-100 25-100 3-20

Sufficiency Ranges
----------%----------
N	P	K	Ca	Mg	S
2.00-3.00	0.20-0.40	1.50-3.00	0.20-0.50	0.15-0.50	0.18-0.50

----------ppm----------
Zn	Cu	Mn	Fe	B
20-70	5-25	25-100	25-100	3-20

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SOYBEANS

Sampling Guidelines: Top mature leaves sampled prior to or at initial pod filling.

Sufficiency Ranges
----------%----------

N P K Ca Mg S

4.25-5.00 0.25-0.50 1.70-2.50 0.45-1.50 0.25-0.80 0.20-0.60

----------ppm----------

Zn Cu Mn Fe B

20-70 5-30 15-200 50-300 20-60

Sufficiency Ranges
----------%----------
N	P	K	Ca	Mg	S
4.25-5.00	0.25-0.50	1.70-2.50	0.45-1.50	0.25-0.80	0.20-0.60

----------ppm----------
Zn	Cu	Mn	Fe	B
20-70	5-30	15-200	50-300	20-60

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TOBACCO

Sampling Guidelines: Top mature leaves on vegetative stems sampled in June or July.

Sufficiency Ranges
----------%----------

N P K Ca Mg S

3.50-4.25 0.20-0.50 2.50-3.20 0.75-3.50 0.20-0.60 0.20-0.40

----------ppm----------

Zn Cu Mn Fe B

20-60 5-10 20-350 50-200 20-100

Sufficiency Ranges
----------%----------
N	P	K	Ca	Mg	S
3.50-4.25	0.20-0.50	2.50-3.20	0.75-3.50	0.20-0.60	0.20-0.40

----------ppm----------
Zn	Cu	Mn	Fe	B
20-60	5-10	20-350	50-200	20-100

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