SarahBuck

Hey,

I am to complete a project that involves doing an experiment
'to determine the impact of each additive, the effects on samples of a
garden soil of adding 20% by mass of (a) sand, (b) potting compost, and © clay on the rate of drainage of soil'.

The working of the the title is whats confusing me. My question is:

does one add the additive that would equates to 20% of the mass of the garden soil i.e. adding 20g of sand to 100g of garden soil
or
does remove 20% of the garden soil and replace it with the additive i.e. 20g of sand mixed with 80g of garden soil.


Thanks in advance for any help!

Hey,

I am to complete a project that involves doing an experiment
'to determine the impact of each additive, the effects on samples of a
garden soil of adding 20% by mass of (a) sand, (b) potting compost, and © clay on the rate of drainage of soil'.

My question is:
does one add the additive that would equates to 20% of the mass of the garden soil i.e. adding 20g of sand to 100g of garden soil
or
does remove 20% of the garden soil and replace it with the additive i.e. 20g of sand mixed with 80g of garden soil.


Thanks in advance for any help!