The OSU Soil Health Laboratory can analyze plant tissue for macronutrients and micronutrients. Some plant tissue testing is done as a matter of routine, and some tissue testing is only done if a deficiency is suspected. Since the correct part of the plant and timing for collection will vary depending on the crop, it is important to sample according to directions in a nutrient management guide. Nutrient management guides for many crops are available through the OSU Extension Catalog.

If tissue samples are to be submitted fresh, please get them to the lab as soon as possible to avoid mold accumulation. If you are not able to submit the samples immediately, it is best to air dry them for 24-48 hours before submitting. Samples can be submitted in paper or plastic bags. Please have each sample bag clearly labelled.

Compost samples can be analyzed for nutrient content, total ash, moisture, organic matter, pH, EC, and C:N ratio. Samples should be submitted to the lab as soon as possible after sampling. If sampling from a pile, the sample that you submit should be a composite sample from at least five different locations in the pile.

Analysis  package Who should choose this package? Price per sample - standard timeline Price per sample - RUSH timeline (2 business days - check for availability) Minimum preferred mass of sample to submit (wet basis)
Plant Nutrient Analysis (C, N, P, K, S, Ca, Mg, B, Mn, Fe, Zn, Cu) Customers who are concerned about a nutrient deficiency $31.50 $93.00 15 g
Manure/compost analysis (C, N, NO3, NH4, P, K, Ca, S, Mg, Total ash, moisture) Customers who want more information about compost or other organic amendments that they will be applying to their soil $56.50 $149.00 15 g

All listed components of packages are also available individually. Other plant tissue analyses are also available. Please contact the lab for details.