Is Lead Poisoning a Risk in Urban Gardens?

82-Lead-Tile

Those of you who have followed our blog over the years know that our yard is contaminated with lead. This is, most likely, due to some combination of lead paint residue and car exhaust. For years we’ve grown vegetables in raised beds because of this issue.

But if the results of a University of Washington study on lead and urban agriculture are to be believed, we might not need to be as concerned. The researchers note that most vegetables don’t take up lead and that improving soil with compost greatly reduces the bioavailability of lead.

You can read a summary of the results of this research paper here.

Thanks to Joanne Poyourow of Environmental Change Makers for tipping me off to this research.

074 Beyond the War on Invasive Species with Tao Orion

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Is there something wrong with the “war” on invasive plants? What are these resilient plants trying to tell us? Is there such a thing as a “natural” landscape? What’s wrong with Glyphosate? These are some of the topics we discuss in our conversation with Tao Orion, author of Beyond the War on Invasive Species: A Permaculture Approach to Ecosystem Restoration. Tao is a permaculture designer, teacher, homesteader, and mother living in the southern Willamette Valley of Oregon. She teaches permaculture design at Oregon State University and at Aprovecho, a 40-acre nonprofit sustainable-living educational organization. Tao consults on holistic farm, forest, and restoration planning through Resilience Permaculture Design, LLC. She holds a degree in agroecology and sustainable agriculture from UC Santa Cruz. Her website is www.resiliencepermaculture.com.

If you want to leave a question for the Root Simple Podcast please call (213) 537-2591 or send an email to [email protected]. You can subscribe to our podcast in the iTunes store and on Stitcher. The theme music is by Dr. Frankenstein. A downloadable version of this podcast is here.

Ill advised grafting projects

Many thanks to Dr. Brew for alerting us to this Simpsons routine about crossing tomatoes with tobacco. I took a look at the research on grafting tomatoes to tobacco root stock (though it seems Homer crossed the seeds) and the technique shows some promise. According to this study,

Tobacco grafting had a positive effect on the tomato plant cultivation performance; the onset of flowering was almost 15 days earlier and the tomato flower and fruit yields increased in both tomato cultivars. Tobacco grafting resulted in 5.0% and 30.1% increase in total fruit weight for cv. Sweet and cv. Elazig, respectively. Because the level of nicotine was within acceptable ranges, tobacco-grafted tomato fruits were considered to be safe for consumption. Self-grafted tomato cultivars also had flowering time onsets almost 11 days earlier. However, self-grafting caused 6.0% and 7.6% less total fruit yield per cv.

It does remind me of the unsuccessful attempt back in the 1970s to graft hops onto cannabis root stock with the goal of creating a legal looking plant containing THC. The grafts take but the “Hopijuana” plants contain no THC. No doubt this is a huge disappointment to the microbreweries of Colorado.

073 Permaculture From the Inside Out with Rachel Kaplan

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In this week’s episode we talk to Rachel Kaplan who is a somatic psychotherapist, permaculture designer, educator, and author. Rachel lives on a small urban homestead with her family and their many critters in Petaluma, CA. She is a co-founder of the 13 Moon CoLab, an all-woman teaching team offering an evolutionary training, Permaculture from the Inside Out. Her collaborators in this venture are Kyra Auerbach, Delia Carroll and Cassandra Ferrera. Rachel wrote Urban Homesteading: Heirloom Skills for Sustainable Living (with K. Ruby Blume), and is currently working on a long-awaited book about community dance ritual with dance luminary Anna Halprin. Her website is: www.13mooncollaborative.com. Friend 13 Moon CoLab in Facebook here. During the show Rachel also mentions: Daily Acts, Starhawk and Mark Lakeman.

If you want to leave a question for the Root Simple Podcast please call (213) 537-2591 or send an email to [email protected]. You can subscribe to our podcast in the iTunes store and on Stitcher. The theme music is by Dr. Frankenstein. A downloadable version of this podcast is here.

Should I Try Tomato Grafting?

Tomato-grafting
A question for you, our dear readers. Have you ever grown grafted tomatoes? Have you ever tried to graft your own tomatoes?

In case you’re not familiar with the idea, you can graft, for instance, an heirloom tomato on to a more hardy root stock tomato to increase disease resistance and yields. You can also graft tomatoes onto potato plants (two crops in one!) as well as graft tomatoes onto eggplants for plants that are more hardy in soggy soils. In the bad idea department, you can graft tomatoes onto tobacco (for nicotine laden fruit) and jimsonweed (for poisonous fruit–note this strange incindent).

The Illinois Extension service has detailed tomato grafting instructions and notes on root stock selection here.

So what do you think? Intrigued? Comments!