Environmental BioTechnologies, Inc.

Does soil type have an effect on the MET value?

EBT conducted an extensive study to determine if there was a correlation between soil type and the MET value. Over 15,000 soil samples collected from the southern regions of Alberta and Saskatchewan, Canada were classified into 15 types of soils and MET scores were determined. The soils were visually classified into the following 15 groups:

1. Sand	9. Clay loam, gray
2. Silt, white/tan	10. Clay loam, brown
3. Silt loam, white	11. Clay loam, dark brown
4. Silt loam, brown	12. Clay, gray
5. Loam, light brown	13. Clay, brown
6. Loam, brown	14. Clay, dark brown
7. Loam, orange-brown	15. Clay, dark gray
8. Loam, dark brown

The overall distribution of soil types collected in this study is shown in the following figure, indicating that the majority of the soils were brown loams, followed by the dark brown loams. The remaining soil types, sands, silts, and clays were collected in less numbers.

The average MET score for the specific soil types is presented in the following figure. It shows that dark brown clay soils have an average MET score just above 12. The dark brown loams, and clay loams had MET scores of 10, and 9, respectively. The remaining soil types had MET score averages between 5 and 8, except for the white silt loams which had a MET score average just above 3. It is important to keep in mind that the sand, silt and clay soils were less common in this region of study, therefore their data is limited.

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Environmental BioTechnologies, Inc.
255C S. Guild Ave.
Lodi, CA 95240
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