Category: Urban agriculture

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Turning market waste into meat and milk

A recent paper  in Animal Feed Science and Technology ((C.B. Katongolea et al. (2007) Nutritional characterization of some tropical urban market crop wastes. http://dx.doi.org/10.1016/j.anifeedsci.2007.09.002)) did a number on three different kinds of waste from the markets of Kampala, Uganda. Waste from banana, sweet potatoes and Solanum aethiopicum (African eggplant) were chemically analyzed and fed to sheep and goats. That way, the scientists could measure what the wastes contain and how much of that the animals could make use of. Turns out — surprise — that there are differences among the wastes and differences between wet and dry season wastes. Banana leaves and pseudostems were not all that nutritious, and African eggplant leaves were very watery. But sweet potato leaves were just right: “sufficient to provide the CP (crude protein) and ME (metabolizable energy) required by growing goats under tropical conditions”.

Which is nice to know, but not all that surprising, given that about half the sweet potato crop in China is fed to livestock. Of course, pigs are monogastric, while sheep and goats are ruminants, so it was worth checking.

Will this see the market people of Kampala bundling sweet potato waste for sale? Or maybe the farmers will grow the leafy varieties specifically for animal fodder.

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Garden Mosaics

Garden Mosaics is “a science education and outreach program based at Cornell University that has been thriving in more than two dozen cities” in the US and has recently spread to South Africa. Marianne Krasny, a professor at Cornell, kept a blog of her 2006 trip to southern Africa. I wonder what they think about urban fruit gleaning…

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Home is where you make it

Professor Roy Ellen, the project director, said: “This project aims to better understand the levels of agrobiodiversity found in home gardens – that is those gardens intimately linked to individual households. For example, we want to know where seed and other plant material comes from, whether it is purchased or obtained informally, who gives and receives it; who receives vegetable produce, and the economic scale of such exchanges. We wish to learn how people learn to become good home gardeners. Whilst biological diversity in itself is important, so are the skills and knowledge that maintain it.”

If you were a reasonably active member of this community and you read the above quotation you might just possibly think, “Ah. Another project to explore the value of agricultural biodiversity and the social networks that support it in some far-flung corner of the developing world. Nepal, maybe, or Burkina Faso.”

But you would be wrong. For the quote comes from an announcement of a project to study home gardens in that most English of settings, Kent. ((I’m giving it more space than Luigi’s original nibble, because I think it is worth it.)) This is exactly the sort of thing I think is sorely needed to forge links among people worldwide. I’ve not been able to find out that much more about the project, although it seems that at least some people at the University of Kent are admirably qualified. And both the Eden Project and the Royal Botanic Gardens, Kew, “will help with the dissemination of the project output”. I hope that means that they will draw the connections to home gardeners everywhere.