A Simple Soil Structure Test
It's called a slake test. All you need is a dry lump of your garden soil and a plant saucer.
Here's how:
  1. Go to your garden and find a dry, naturally formed lump of soil, about the size of a golf ball. Don't mould it in your hand.
2. Place it gently in a dry plant saucer.
3. Slowly pour a small amount of water into the saucer until there's just 3-5mm of water around the clod. Don't pour over the top.
4. Watch. Wait 2-5 minutes.
What to look for:
  • Does the clod hold its shape in the water? Your soil has signs of good organic matter and structure.
  • Does it slowly crumble and fall apart from the edges? That's moderate structure, maybe it could do with some help.
  • Does it rapidly melt into mud? The structure is weak, it might be that it needs more organic life.
Try it and report back! "Held," "Crumbled," or "Melted."
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Toby Cox
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A Simple Soil Structure Test
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