Leaf & Plant Tissue Sampling Procedure - Ward Laboratories Inc.

Plant Analysis | Leaf & Plant Tissue Sampling Procedure

Leaf & Plant Tissue Sampling Procedure

We can help you determine if there are excessive or insufficient nutrient levels in a variety of plant tissues including: corn, beans, small grains, hay, grasses, alfalfa, and milo. See the various sampling procedures below.

Sampling procedure varies by crop. Please consult the table below for instructions for your plant type

Field Crop Stage of Growth Plant Part to Sample No. of Plants to Sample
Corn Seedling stage
(Less than 12″)
All the above ground portion 20 – 30
Prior to tasseling The top leaf with collar 15 – 25
From tasseling to early silking The entire leaf at the ear (or immediately below it) 15 – 25
Sampling after silks brown is not recommended.
Field Crop Stage of Growth Plant Part to Sample No. of Plants to Sample
Soybeans or other beans Seedling stage
(Less than 12″)
All the above ground portion 20 – 30
Initial flowering Two or three fully developed leaves at the top of the plant 20 – 30
Sampling after pods begin to fill is not recommended.
Field Crop Stage of Growth Plant Part to Sample No. of Plants to Sample
Small Grain Seedling stage
(Less than 12″)
All the above ground portion 50 – 100
Boot to heading The above ground portion 20 – 30
Sampling after pods begin to fill is not recommended.
Field Crop Stage of Growth Plant Part to Sample No. of Plants to Sample
Hay, pasture or forage grasses Just prior to seed head emergence or 4 to 6 weeks after clipping Whole tops 20 – 30
Field Crop Stage of Growth Plant Part to Sample No. of Plants to Sample
Alfalfa Bud stage to 1st flower The upper 1/3 of the plant 15 – 25
Field Crop Stage of Growth Plant Part to Sample No. of Plants to Sample
Milo Very early heading Second leaf from top of plant 15 – 25

Note: To sample a cover crop, harvest a 3’ x 3’ square of your growing crop. Clip all plants in the area at the soil surface, with emphasis on excluding soil from the sample. Put all foliage from the sampled area in a large paper or yard waste bag.

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Ready to submit your sample?

Download the submittal form and make sure you include your name, address, phone number, sample ID, and desired analysis. Email address is suggested for rapid return on reports.

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