This is done using the recommended 2mm sieve type. Remove the barcodes and pour the sample in the hand sieve to remove all stones and other big pieces. Use the pestle to crush the soil and make sure the entire sample has been sieved. Throw all foreign materials to the bin. Clean the sieve and pestle afterwards.
If you have any further questions, please reach out to our support team via support@agrocares.com.
Thank you!
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