2.5kg of soil will be required.
Amount of soil needed per plant sample = 250 grams
Number of plant samples = 10
Therefore, in order to get the total amount of soil that's needed will be:
= Amount of soil needed per plant sample × Number of plant samples
= 250g × 10
= 2500g
= 2.5kg
Therefore, 2.5kg of soil will be required.
Note that 1000gram = 1kg
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