Nitrate N Packages

For petiole submissions only (ie. potatoes, sugar beets). Consult the Sampling Instructions page for which part of the plant to sample.

T1

$20.00

NO3N

T2

$25.00

NO3N, P

T4

$37.00

NO3N, P, K, S

T6

$56.00

NO3N, P, K, S, Ca, Mg, B, Cu, Fe, Mn, Zn

Total N Packages

For non-petiole submissions only (leaf and whole plant submissions). Consult the Sampling Instructions page for which part of the plant to sample.

T7

$24.00

TKN

T8

$29.00

TKN, P

T10

$41.00

TKN, P, K, S

T12

$60.00

TKN, P, K, S, Ca, Mg, B, Cu, Fe, Mn, Zn

TI Individual Tests

$20.00

NO3N, P, K, S, Ca, Mg, B, Cu, Fe, Mn, Zn, TKN, Cl
Add to existing package $12

Turn Around

Regular - Out of Busy Season (Sep - May):

3 Business Days

Regular - In Busy Season (Jun - Aug):

1 Business Day

Terms & Definitions

TKN:

Total Kjeldahl Nitrogen is the sum of nitrogen found in organic substances, nitrogen in ammonia and ammonium.

NO3-N:

Nitrate Nitrogen. The portion of nitrogen in the plant tissue tested as Nitrate-N.

Online Submission Forms

Submit your sample online using one of the forms below.

Tissue Submission Form:

Consult with the table below to determine which parts of the plant to sample. Please keep tissue samples cool in paper bags and bring them to the lab shortly after sampling. Do not use plastic bags as the samples can sweat and start to mold, negatively impacting results. Submission forms for tissues can be found under the Files & Online Submissions tab and must be submitted with each sample in order to ensure proper testing is performed.

Tissue sample guide Matrix

For use: Find the crop you are sampling. The Stage of the crop determines which Plant Part to Sample and the Quantity of those parts necessary to perform analyses.

Crop

Stage

Quantity

Plant Part to Sample

Alfalfa

Prior to Flowering

25

Tops (6" new growth)

Apple

Summer

100

Mature leaves from new growth

Asparagus

Mid Summer

25

Top 15 cm fronds

Asparagus

Late Summer

30

Top 50 cm fronds

Barley

Prior to Jointing

100

Whole plant cut 1" above soil

Barley

Up to Heading

100

Plants (Top two or three leaves)

Barley

Flag Leaf

100

Flagleafs

Bean, Kidney

All Stages

50

Most recently matured trifoliate leaves

Bean, Navy

All Stages

50

Most recently matured trifoliate leaves

Bean, Pinto

All Stages

50

Most recently matured trifoliate leaves

Blueberry

All Stages

150

Mature leaves from new growth

Broccoli

All Stages

30

Mature leaves from new growth

Brussel Sprouts

All Stages

30

Mature leaves from new growth

Cabbage

Up to 6 Weeks

40

Whole tops cut 1" above soil

Cabbage

2 to 3 Months

30

Wrapper Leaves

Cabbage

Head 3/4 Mature

30

Wrapper Leaves

Cabbage

Mature

40

Midribs from wrapper leaves

Canola

All Stages

50

Mature leaves without petioles

Cantaloupe

Young Vines

30

Most recently matured leaf and petiole

Cantaloupe

Small Fruit

30

Unfurled leaves (5th leaf from tip)

Cantaloupe

Up to Harvest

30

Unfurled leaves (5th leaf from tip)

Carrot

Young

40

Mature leaves from new growth

Carrot

Mature

40

Leaves (oldest leaves)

Cauliflower

Buttoning

30

Most recently matured leaf and petiole

Cauliflower

Heading

30

Mature leaves from new growth

Celery

6 Weeks after Transplant

30

Petioles from most recent fully developed leaves

Celery

Up to 6 Weeks

30

Mature leaves from new growth

Celery

Up to Mature

30

Mature leaves from new growth

Clover

All Stages

40

Top 4-6 inches (leaves and stems)

Corn, Grain

Up to 4"

30

Whole tops cut 1" above soil

Corn, Grain

Up to 12"

30

Whole tops cut 1" above soil

Corn, Grain

Up to Tasseling

25

Leaves below the whorl

Corn, Grain

Initial Silk

25

Leaves from base of ear

Corn, Grain

Filling

25

Unfurled leaves (5th leaf from tip)

Corn, Grain

Maturity

25

Leaves from base of ear

Cranberry

All Stages

150

Mature leaves from new growth

Cucumber

Before Bloom

30

Most recently matured leaf and petiole

Cucumber

Small Fruit

30

Leaf blades (5th leaf from tip)

Cucumber

Up to Harvest

30

Leaf blades (5th leaf from tip)

Bean, Faba

All Stages

100

Leaf blades without petioles from uppermost mature leaves

Flax

Up to 12"

50

Whole tops cut 1" above soil

Flax

Up to Heading

100

Three or Four uppermost leaves

Forage, Brome

All Stages

50

Tops cut 2.5" above soil line

Forage, Grass

All Stages

50

Tops cut 2.5" above soil line

Forage, Mixed

Prior to Jointing

50

Tops cut 2.5" above soil line

Forage, Mixed

Up to Flowering

100

Flagleafs

Garlic

Pre Bulbing

30

Most recent fully developed (green portion only)

Garlic

Bulbing

30

Most recent fully developed (green portion only)

Garlic

Post Bulbing

30

Most recent fully developed (green portion only)

Ginseng

Mid Season

75

Youngest mature leaves

Grape

All Stages

100

Leaf petioles opposite basal flower clusters

Grass

All Stages

50

Tops cut 2.5" above soil line

Hemp

All Stages

20

Stems (10 cm base section plus 10 cm section 1 m from tip)

Lentils

All Stages

100

Uppermost mature leaves

Lettuce, Iceberg

Up to Heading

30

Leaves from mature heads

Lettuce, Iceberg

Mature

30

Wrapper Leaves

Lettuce, Romaine

Up to 8 Leaf

30

Undamaged outer/wrapper leaves

Lettuce, Romaine

Mature

30

Undamaged outer/wrapper leaves

Melon

All Stages

30

Unfurled leaves (5th leaf from tip)

Mint

All Stages

30

Mature leaves from new growth

Mustard

All Stages

50

Blades from fully expanded leaves

Oats

Prior to Jointing

100

Whole plant cut 1" above soil

Oats

Up to Heading

100

Plants (Top two or three leaves)

Oats

Flag Leaf

100

Flagleafs

Onion

Young Bulb

30

Whole tops (green portion only)

Onion

Maturing Bulb

30

Whole tops (green portion only)

Pea

All Stages

60

Most recent fully developed leaflets

Pepper

Half Mature Fruit

60

Mature Leaves from new growth

Pepper

Mature Plant

60

Mature Leaves from new growth

Potato

All Stages

50

Petioles from most recent fully developed leaves

Pumpkin

5 Weeks

20

Most recently matured leaf and petiole

Pumpkin

8 Weeks

20

Most recently matured leaf and petiole

Pumpkin

Mid Season

40

Mature leaves from new growth

Raspberry

All Stages

100

Mature leaves from midsection of primocanes

Rye

Prior to Jointing

50

Whole plant cut 1" above soil

Rye

Up to Heading

100

Top two or three leaves

Rye

Flag Leaf

100

Flagleafs

Sorghum

23-37 Days

50

Whole tops

Sorghum

37-56 Days

50

Mature leaves from new growth

Sorghum

Bloom

50

Leaves, third leaf below head

Sorghum

Grain Dough

50

Leaves, third leaf below head

Soybean

Early Growth

50

Most recently matured trifoliate leaves

Soybean

Early Flowering

50

Most recently matured trifoliate leaves

Soybean

Up to Pod Set

50

Mature leaves from new growth

Soybean

Pod Filling

50

Mature leaves from new growth

Squash

All Stages

25

Leaf blades from most recent fully developed leaves

Squash

Early Fruit

20

Most recently matured leaf and petiole

Strawberry

At Flowering

20

Most recently matured leaves only

Strawberry

End of Season

20

Most recently matured leaf and petiole

Strawberry

Initial Flower

20

Most recently matured leaf and petiole

Strawberry

Initial Harvest

20

Most recently matured leaf and petiole

Strawberry

Mid Season

20

Most recently matured leaf and petiole

Strawberry

Transplants

20

Most recently matured leaf and petiole

Sugarbeet

All Stages

50

Recently matured leaves

Sugarbeet

All Stages

50

Petioles from most recent fully developed leaves

Sunflower

All Stages

50

Mature leaves from new growth

Corn, Sweet

30-50 cm tall

25

Unfurled leaves (5th leaf from tip)

Corn, Sweet

50-70 cm tall

25

Unfurled leaves (5th leaf from tip)

Corn, Sweet

6 Leaf

50

Whole tops

Corn, Sweet

End of Silk

25

Unfurled leaves (5th leaf from tip)

Corn, Sweet

Full Tassel

25

Unfurled leaves (5th leaf from tip)

Corn, Sweet

Tassel Start

25

Unfurled leaves (5th leaf from tip)

Sweet Potato

Early Vining

50

Most recently matured leaf and petiole

Sweet Potato

Mid Season

50

Most recently matured leaf and petiole

Sweet Potato

Root Enlargement

50

Most recently matured leaf and petiole

Sweet Potato

First Half of Growing Season

40

Most recently matured leaves

Sweet Potato

Harvest

40

Most recently matured leaf and petiole

Timothy

Prior to Jointing

50

Whole plant cut 1" above soil

Timothy

Up to Heading

100

Top two or three leaves

Timothy

Flag Leaf

100

Flagleafs

Tomato, Field

Mid Bloom

40

Compound leaves adjacent top inflorescences

Tomato, Greenhouse

Mature

60

Compound leaves from new growth

Tomato, Indeterminate

5 Leaf

60

Most recently mature leaf and petiole

Tomato, Indeterminate

Early Fruit

60

Most recently mature leaf and petiole

Tomato, Indeterminate

First Flower

60

Most recently mature leaf and petiole

Tomato, Indeterminate

First Fruit

60

Most recently mature leaf and petiole

Tomato, Indeterminate

Harvest

60

Most recently mature leaf and petiole

Tomato, Trellis

Fifth Cluster

30

Leaf petioles opposite or below top flower cluster

Tomato, Trellis

First Cluster

30

Leaf petioles opposite or below top flower cluster

Tomato, Trellis

Fourth Cluster

30

Leaf petioles opposite or below top flower cluster

Tomato, Trellis

Second Cluster

30

Leaf petioles opposite or below top flower cluster

Tomato, Trellis

Sixth Cluster

30

Leaf petioles opposite or below top flower cluster

Tomato, Trellis

Third Cluster

30

Leaf petioles opposite or below top flower cluster

Tomato, Trust

Production

60

Mature leaves from new growth

Tree, Mayday

All Stages

100

Mature leaves from new growth

Triticale

Prior to Jointing

50

Whole plant cut 1" above soil

Triticale

Up to Heading

100

Top two or three leaves

Triticale

Flag Leaf

100

Flagleafs

Watermelon

Flower Start

25

Unfurled leaves

Watermelon

Small Fruit

30

Mature leaves from new growth

Watermelon

Older Fruit

30

Unfurled leaves (5th leaf from tip)

Wheat, Durum

Prior to Jointing

100

Whole plant cut 1" above soil

Wheat, Durum

Up to Heading

100

Plants (Top two or three leaves)

Wheat, Durum

Flag Leaf

100

Flagleafs

Wheat, Spring

Prior to Jointing

100

Whole plant cut 1" above soil

Wheat, Spring

Up to Heading

100

Plants (Top two or three leaves)

Wheat, Spring

Flag Leaf

100

Flagleafs

Wheat, Winter

Prior to Jointing

100

Whole plant cut 1" above soil

Wheat, Winter

Up to Heading

100

Plants (Top two or three leaves)

Wheat, Winter

Flag Leaf

100

Flagleafs

Zucchini

All Stages

30

Mature leaves from new growth