Soil Health Reference Program – is your lab participating?
Solvita offers a soil test reference program featuring soil recognized as indicating biological fertility. This program differs from conventional “proficiency” programs. Programs like NAPT and ALP are designed only for chemical nutrient lab test validation. For biological test proficiency, testing and sample prep must be conducted differently, without high-speed grinding and maceration. Proficiency programs that grind and sieve soils for homogeneity in soil mineral nutrients are very likely damaging the soils for biology tests, for example, by exposing raw, protected organic matter which is subsequently respired, and destroying micro-aggregates, on which internal aeration depends during a biology test.
The Solvita reference program does two unique things: it offers soil samples selected based on validated management history (example: depleted vs improved organic management) and which are handled in such a fashion as to not damage inherent biological traits. The soils are mechanically rolled and not hammermilled, macerated or sieved finer than 2mm. This protects the macro-traits intrinsic to soil biological functioning.
As a convenience to persons wishing to access labs with tested capabilities in soil health parameters an active list is maintained and may be requested:
KEY to MAP SYMBOLS
PARTNER: A soil laboratory that offering 2 or more tests consistent with biological fertility analysis.
OUTREACH: These firms carry some or all Solvita biological fertility products for resale but do not offer a testing service.
Join the Solvita Soil Biological Fertility Reference Program: This unique program is accessed by more than 35 organizations per year. It aids labs to evaluate their own performance and has bolstered statistical confidence in the magnitude and the proficiency of distinguishing soil health metrics by analytical methods. All participants receive the Annual Soil Health Test Proficiency report prepared by Dr William Brinton, Director, Woods End Laboratories, inc.
Analyses Examined in 2018: CO2-Respiration (by any method; Organic-N; Aggregate Stability; Organic Matter.
PREVIOUS Solvita Proficiency Report:
SOIL GRINDING EFFECTS ON RESPIRATION.
Solvita QAQC programs have been able to determine that there is a confounding factor of grinding vs soil structure & texture and initial fertility, on the rate of respiration determined by Solvita using ALP soil series: