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Crop Sampling Chart
 
   

Crop Sampling Chart

Carefully review pictorial sampling guide procedures 
For printable PDF of Crop Sampling Chart Click here

Crop

Time

Method of Sampling

# Of Plants to Sample

Corn

Prior to 4th leaf stage

Collect whole plants, cutting at ground level

30

Corn

Prior to tasseling

Gather the whole leaf immediately below the whorl, removing at the stalk

20

Corn

At silk when silks are still green

Gather the entire ear leaf, removing at the stalk

20

Soybeans

Prior to 8" tall

Collect all above ground portion

25

Soybeans

At initial bloom

Collect trifoliate leaves, one trifoliate set per plant.  Remove the leaf petiole

25

Small Grains

Prior to heading

Remove upper 6" of the plant, leaves only

35

Cotton

At full bloom

Select youngest recently matured leaves on the male stem, collecting 2 leaves per plant

25

Alfalfa

Prior to or at bloom

Collect top 6" of plant

30

Forage-Grasses

For maximum quality hay

Remove top 6" of plant.

50

Tobacco

Prior to or at bloom

Take the entire 4th leaf from the top of the plant

15

Grain-Sorghum

Prior to or at heading

Submit second leaf from the top of the plant

25

For laboratory specific information regarding plant tissue analysis, procedures, guidelines, test packages/supplies or analysis kits, please contact one of our laboratories nearest you listed below:  

Laboratory Locations:

AgSource Laboratories - Bonduel, WI715-758-2178 bonduel@agsource.com 
AgSource Laboratories - Ellsworth, IA 515-836-4444ellsworth@agsource.com 
AgSource Laboratories - Lincoln, NE 402-476-0300 lincoln@agsource.com 
AgSource Laboratories - Umatilla, OR541-922-4894 umatilla@agsource.com
*NOTE: For crops not listed, contact office locations above directly.
   
 
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