Tissue Services
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
$21.00
NO3N
T2
$26.00
NO3N, P
T4
$37.00
NO3N, P, K, S
T6
$57.00
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
$25.00
TKN
T8
$29.00
TKN, P
T10
$41.00
TKN, P, K, S
T12
$61.00
TKN, P, K, S, Ca, Mg, B, Cu, Fe, Mn, Zn
TI Individual Tests
$21.00
NO3N, P, K, S, Ca, Mg, B, Cu, Fe, Mn, Zn, TKN, Cl
Add to existing package $13
TKN Added to an existing package $20
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.
P:
Phosphorus
K:
Potassium
S:
Sulfur
Ca:
Calcium
Mg:
Magnesium
B:
Boron
Cu:
Copper
Fe:
Iron
Mn:
Manganese
Zn:
Zinc
Online Submission Forms
Submit your sample online using one of the forms below.
Tissue Submission Form:
Online Tissue Submission Form
Files
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 |
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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. |
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|
Crop |
Stage |
Quantity |
Plant Part to Sample |
|---|---|---|---|
|
Alfalfa |
Prior to Flowering |
25 |
Tops (6" new growth) |
|
Apple |
Summer |
100 |
Mature leaves from new growth |
|
Arugula |
Summer |
50 |
Leaves fully expanded |
|
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 |
70 |
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 |
|
Chick Pea |
All Stages |
70 |
Mature leaves without petioles |
|
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 stems |
|
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 |