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Standard operating procedure for handling and preparation of soil samples for chemical and physical analyses










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    Booklet
    Standard operating procedure for soil organic carbon: Tyurin spectrophotometric method 2021
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    This protocol applies to the determination of the oxidizable organic carbon content in the soil. The organic carbon content is calculated from the amount of chromic ion (Cr3+) formed which is determined by the spectrophotometric method.
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    Book (stand-alone)
    Standard operating procedure for soil enzyme activities
    β-glucosidases, arylsulfatase, N-acetyl-β-glucosaminidase, dehydrogenase, phosphomonoesterases
    2025
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    This standard operating procedure (SOP) has been harmonized by the joint working group of the FAO's Global Soil Laboratory Network (GLOSOLAN) and the International Network on Soil Biodiversity (NETSOB). The protocol focuses on the determination of five soil enzyme activities: β-Glucosidases, Arylsulfatase, N-acetyl-β-Glucosaminidase, Dehydrogenase, and Phosphomonoesterases. After a general introduction on the importance of soil enzyme as key indicator for soil health and few remarks on the sampling strategies, the determination of each enzyme is presented separately with step-by-step instructions.
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    Booklet
    Standard operating procedure for soil bulk density, cylinder method 2023
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    Soil bulk density is an indicator of soil compaction and soil health and is an important factor to consider when assessing the physical behaviour of soils, as it affects infiltration, root depth and restrictions, available water capacity, and soil porosity. Soil porosity controls many soil properties and ecosystem services and is consequently one of the most important soil characteristics. This method is applicable to the determination of soil bulk density using the cylinder method. The cylinder method is generally used to characterize the bulk density of an undisturbed soil sample having a volume of between 100 and 250 cm3.

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