Well, actually, I mean topsoil, not dirt. Topsoil is the top 5cm of the Earth's dirty crust. It's full of microbes, broken down organic material, worms and ants, and hopefully, some water and not a lot of salt. It's where everything good in the plant world happens. And it's leaving us.
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Not much topsoil here.... |
This picture is from near where I live. We used to have nice topsoil, not a full 5cm, but more than this. Our weather has gotten more extreme, with more drought, more monsoon-type deluges, and many more days with very high winds. Our topsoil has vamoosed! And buying more and laying it down over this dry silty sand doesn't help, as the winds and heavy rains just wash it away again. My patches of garden with vetiver are doing much better. Vetiver has deep, extensive roots that really keep the soil locked in. So anchoring plants are great. Mesembs offer many species of anchoring plants; iceplant is a big soil saver in California. Carpobrotus edulis is one fine plant!
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Carpobrotus, on the job saving your soil. |
Worldwide, the topsoil situation is pretty much the same as where I live. Drought is drying the topsoil, then wind or sudden deluges carry it away. "Black blizzards" of topsoil are getting more common, as they did in the 1930s in the US...
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Historical photo of the 1930s US Dustbowl |
And in Australia, their "Angry Summer" has brought fire, drought, and floods all together. Yeesh! Here's a picture from the floods in Queensland- you can see that topsoil just washing away to wherever.
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Queensland flooding |
No topsoil, no plants, no plants, no us. It's not very fashionable these days to be thinking of, and talking about, dirt, but it would be wise to do so. And I'm thinking of more ways to protect the little patch of dirt that's under my stewardship. More vetiver and iceplant, anyone?? And how about a bag of worms?