Soil Sampling

The proper soil sampling is of particular importance. It should be planned well and carried out as follows:

  • Definition of pedological homogenous subareas (based on soil maps, yield mappings, aerial images own experiences, etc.).

  • Selection of subareas to sample (depending on area extension and question of interest, the priorities may be set).

  • Specification of the sampling circle (about 10 m to 15 m in diameter). Documentation of the midpoint (e.g. by GPS).

  • Extracting a composite sample within the sampling circle (spade, sampling devices, sample driller, 10 to 15 single samples). Caution: nickel-plated/chrome-plated/coated tools may affect the test results.

  • Mixing the 10 to 15 single samples in a clean bucket, sort out “disturbing elements” (e.g. parts of plants, animals, etc.).

  • Filling of a sample bag with about 1.5 kg of homogenized sample material (you can order sample bags form us; unused freezer bags are also suitable).

  • Labelling of the sample bag.

  • Completing the order form.

Site composed of 3 soil types

Incorrect soil sampling

Correct soil sampling

The Proper Timing of Soil Sampling

To systemically assess soil fertility, the soil should be sampled in a state of dynamic equilibrium (steady state). Dynamic equilibrium is established 6 to 8 weeks after the application of management measures (e.g. tillage, input of mineral/organic substances). Favourable moments for soil sampling are often before or after harvesting (before stubble breaking) and in spring. The soil must not be too soggy, the moisture level should allow passage of the ground. Nevertheless, for acute questions or problems, soil samples can be taken at any moment.

Temporary Storage of Soil Samples

If it is not possible to ship the sample immediately, the sample should be stored as follows:

  • Sample sealed in the freezer (storage up to 3 months)
  • Sample sealed in the fridge (storage up to 1 week)
  • Unsealed sample stored in a dust-free, dry room at room temperature (storage up to 1 month). Caution: pets and rodents may cause contamination of the sample.

Shipment of the Sample

Close the sample carefully and ship it along with the assignment form to the delivery address below. Shipping should not exceed 2 to 3 days. You’re also kindly welcomed to deliver the samples in person.

Delivery address:

TB Unterfrauner GmbH
Erdbergstraße 10/33
1030 Vienna

The results will be available about six to eight weeks after arrival of the soil sample at TB Unterfrauner GmbH.

Would you like to request a soil analysis?