What is the best way to improve garden soil?

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Can soil be sandy? The by-product of lifting the slabs, this sand needs bagging up! Does that mean I need to buy myself a rake? Well, I’ve just been paid, what else am I going to spend my money on?

Question by Miranda M: What is the best way to improve garden soil?
We are planting a garden and lawn in an area that used to be a corn field, so the soil is depleated.

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