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I stumbled across a book written in the 1920s about root development in vegetable plants and thought that others may find it interesting. It has pictures of how deep and far roots spread. Each picture has one foot squares for scale. Very interesting, especially the horseradish, according to the book they found horseradish roots fourteen feet deep in the soil. I think I may need to track down some horseradish again one day.
This can be downloaded from http://www.soilandhealth.org/01aglibrary/010137veg.roots/010137toc.html
The downsides of the book is that is was written primarily in America, so some things do not necessarily translate to here as we have very different soils, but it gives you a good idea of what can happen underground.
What a great find Mukluk. Thanks for sharing this.
blimey, 14 foot horseradish! No wonder mine isn’t doing very well in a large pot….
Horse radish would be great bio accumulator