Soils are supplied (with specified ranges of clay, silt, sand, organic matter and pH) from between 30 and 40 sites across England, mainland Europe and Brazil We also supply most of the seven soils listed by the OECD for adsorption-desorption studies and also soils of a specific taxonomic classification.
Site location, sampling and intermediate storage is carried out according to ISO 10381-6. Most of our source sites have not been sprayed with pesticides for at least 5 years and we maintain regular contact with our landowners and farmers to ensure that the sites maintain that status.
Soils are supplied on the basis of the average analysis quoted on our supply lists. Through our collaboration with Smithers ERS Limited we can also offer analytical characterisation to GLP of any soil ‘as-supplied’.
This grass field within the Peak District National Park is used for low-input cattle fattening and forage production and is the source of one of our most frequently supplied soils (a very slightly acid silt loam). The tenant farmer uses no pesticides and reports that the outgoing tenant (who had the land for 10 years) used neither sprays nor fertiliser.
Two soils, one a silty clay and the other a sandy loam are supplied from organically-managed rice-growing fields on the Riet Vell Nature Reserve. The paddy fields are flooded from April through autumn so supply requests are preferred outside of that period!
This very clayey acidic tropical soil is from a research station on the edge of Campinas in the Sao Paulo state of Brazil. Sample collection is from a pesticide-free old coffee grove on the edge of arable land. This soil and three others from Sao Paulo state, provide the four soils approved by the Brazilian Institute of Environment and Renewable Natural Resources for use in environmental fate studies.