Author Topic: Micro-swales for fertilization.  (Read 930 times)

Offline I.L.W.

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Micro-swales for fertilization.
« on: March 28, 2016, 08:17:10 AM »
I'm trying to improve raspberry production. My soil is rich in potassium about 3' deep, but raspberries are shallow rooted.
This year, I'm diggin small swales along a new raspberry bed. They're roughly 2' deep by 3' wide (100' long). The land is flat, so rather than follow contour, they're filled by run-off from hard surfaces (an access road), but will be leveled. Not a true swale, I know, but I'm attempting to use some of the principals to similar advantage.

It occurred to me, comfrey is a taproot plant with a great potassium mining capability. I'm thinking of filling the bottom of the trench with comfrey, then using a string trimmer to chop & drop in the trench. This can keep the comfrey short (as not to shade the raspberries).

Here's a quick illustration of the idea.



Obviously, the comfrey in the image isn't to scale, it's just a 10 minute crude sketch.  Any ideas, things I'm missing, additions that would make the system better?