Soil Ring Samplers. Soil ring samplers, also known as "core cutter", bulk density rings and soil profile samplers are used to sample undisturbed soil samples into soil sample rings, e.g. for soil density determination. The soil ring samplers can be used both vertically (for top soil coring in light soils), and horizontally for sampling morphometric soil horizons / depth layers in soil profile pits / walls. The soil ring samplers are offered in three versions:
We offer custom-made samplers for various soil sample ring diameters and heights. We ensure delivery of fitting soil sample rings in the years to come. For deeper / shallower soil sampling campaigns from the top, and if less concerned about compression, consider the Soil Corer (for complete soil profile sampling) or the Topsoil & Root Corer (for organic layer sampling), respectively. Contact us to discuss sampler customisation - we realize all soil sample ring sizes for agricultural and forestry researchers, urban ecologists and DIY soil probing.
The heads of all soil ring corer types are made from steel to provide rigidity without the added weight of stainless steel. For soil coring task in heavy soils, however, please refer to our soil corer. The hammer head differs between types: direct ring samplers provide a sample holder for the soil ring (Type 1), "cutting shoe" type corers (Type 2) fully enclose the soil sample ring ("sleeve") during sampling and allow a cutting shoe / crown to be fitted to the bottom (see pictures) to protect the soil rings from bending on stones etc. Heavy-duty samplers (Type 3) resemble type 2 sampler but without a connection between the hammering head and the soil ring holder, proving a less bending prone system for use in heavier soils. In addition, Type 2/3 ring corers hold extra soil at the inserted end of the soil rings, reducing the risk of "losing" some soil during extraction and thus sampling incomplete cores. Corer heads / ring holders can be painted or left unpainted as required. The soil ring corers are custom-made for a range of soil ring diameters (internal and external) and heights, please enquire for availability and check target dimensions with the Soil Ring Configurator. See below for standard and custom-made Soil Ring Sampling Sets.
Pictures of the heavy duty soil ring sampler (Type 3) will be available soon.
Soil Ring Sampler Sets. Soil Ring Sampling Kits include
Unless specified by the customer, standard soil ring samplers are manufactured for 5 cm high, 5.1 cm inner diameter soil sample rings (i.e. 100.13 cm3 of soil). Standard soil rings are made of stainless steel, 2 mm wall thickness; one side bevelled (towards outside) on customer request. Matching soil ring lids are options, subject to availability for specific soil ring dimensions. Please contact us for a quote on soil ring sampler kits for specific ring sizes or soil volumes.
Soil Sample Rings. Soil rings are manufactured from stainless steel to minimise impact on the sample, other materials are available on request. One side of the rings can be tapered (outwards) to facilitate insertion into the soil (when using the 'direct' type 1 sampler and soil rings longer than the sampler head). High density polyethylene lids (top and bottom) are available for many standard stainless steel (SS) ring diameters to provide secure sample storage during transport. Soil core sample rings are available in various diameters and height (see Soil Ring Calculator below), and with or without bevelling. Soil sample rings sets are sold in sets of minimum 10 rings; sets can include a carrying case. Request a custom quote for soil ring sets today; standard SS soil rings (for sampling of 100 or 200 cm3 of soil) are available in the online store.
Soil ring diameter,
Volume of soil
*Standard dimension of Soil Sample Rings is 5 cm inner diameter, 5.1 cm height in Soil Ring Sampler Sets if not defined by customer. Outside diameter of these sample rings is 5.4 cm.
Use the Soil Ring Configurator Tool to determine the effect of soil ring or soil core sampler inner diameter and height on sampled soil volume, area covered, and approximate the soil sampled.
Among the physical properties of soil, bulk density and porosity are among the most studied parameters requiring undisturbed samples, as they allow the diagnosis of the degree of soil compaction and the identification of potential soil problems for the root development of crops and trees, as well as environmental effects such as reduced water infiltration rates. In addition, soil densities must be known in order to calculate accurate carbon and nutrient stocks. Finally, soil bulk density measurements are required as an input parameter for a wide range of soil process prediction models. Such models often use bulk density measurements to account for horizon mass when aggregating soil data. To assess these soil properties, it is necessary to collect undisturbed samples of known volume. Among the methods for collecting undisturbed soil cores, it is recommended that undisturbed samples are collected using >100 cm3 volumetric soil rings (i.e. approx. 5 cm x 5.1 cm rings). These metal soil rings are carefully driven into the soil using soil density samplers. The larger the diameter of the soil ring core, the less compression can be expected due to the relatively reduced friction on the inner surfaces of stainless steel rings during sampling.
Example sampling procedure:
Here are some best practices to consider when planning your soil ring sampling campaign:
For other tasks, consider large-diameter Soil Corer (deep sampling with often minor compression) or the Topsoil & Root Corer (ideal for humus and root sampling), respectively. See below for a small selection of articles / manuals providing more detailed descriptions on soil sampling procedures.
Use of Soil Ring Samplers and
Bulk Soil Density Determination