- Didn’t quite believe The Economist? Neither does Prof. de Schutter.
- Specialty Crops for Pacific Island Agroforestry ready for prime time.
- New Agriculturist celebrates women.
- Banana network newsletter celebrates the International Transit Centre. Maybe it could treat itself to a new name?
Mixing it up for organic tomatoes
The many benefits of growing a mixture of crop varieties together have now been demonstrated for many crops under many conditions. Latest entry is in a kind of specialised niche — organic tomatoes for processing — and the results are a little underwhelming. Three scientists at the University of California, Davis, grew one, three or five tomato varieties in soil that was either fallow or had a mustard cover crop the preceding winter. ((Barrios-Masias, F., Cantwell, M., & Jackson, L. (2010). Cultivar mixtures of processing tomato in an organic agroecosystem Organic Agriculture, 1 (1), 17-30 DOI: 10.1007/s13165-010-0002-z)) Although there were differences between the mixtures and the monocrop, they were not very pronounced: more shoots, and more fruits that were somewhat redder.
The 3-cv mixture thus had some minor advantages compared with the monoculture, but overall, there was little evidence of higher ecosystem functions from mixtures vs. monoculture.
Leaving aside the question of whether the growing conditions on the farm, as described in the paper, accord with organic ideals, given that they do abide by the rules, it is hard to know what to make of the poor showing of mixtures. The authors concede that there may simply be no benefit to be had because the conditions on California organic processing tomato farms don’t stress the crop to the point where a mixture might be a good thing. It is also possible that the varieties — AB-2, CXD-19, H-2601, H-8892 and Red Spring — do not actually encompass enough trait diversity to offer any benefits. But then, they were chosen as simply the best-performing processing varieties. If mixtures were assembled deliberately to deliver potential benefits, the results might well be different.
Still, good to know.
Nibbles: IK, Fragaria, Citrus, Millet breeding, Vitis, Agricultural biodiversity, Satellite imagery, Subsistence
- Indigenous knowledge of agrobiodiversity makes the news in Indonesia.
- Reconstructing the strawberry.
- And reconstructing the history of cultivated citrus fruits.
- ICRISAT millet breeders get an a new toy.
- Plenty of diversity in the cultivated grape still. And it’s going to need it.
- Biodiversity (and agrobiodiversity?) needed for farm productivity. Well I never! But more mixed results available too. What’s a poor boy to think?
- SPOT 5 imagery can be used to identify crops. In Texas. But in Tanzania?
- Agricultural biodiversity and subsistence traditions, Part 2. In the Ozarks. But in Omo? (And here’s Part 1.)
Nibbles: CBD COP, Biofortification, Foodie potatoes, Dates date, Reintroductions, Quercus, Nomenclature, Maize, P, Agroforestry, Weeds, VIR, Lactose intolerance, Yersinia
- Bioversity DG “jubilant” at Nagoya Protocol.
- A video plug for the biofortification conference.
- Native potatoes on foodie agenda.
- A date palm festival. In the US.
- The success of species introductions.
- Italian acorn cakes deconstructed. I’m told the people able to recognize these sweet acorns are few and old.
- Calling times on biological names. Whoa!
- Saving heirloom mielies.
- What the heck is happening with phosphorus anyway?
- Panamanian farmers don’t like to grow (some) native trees on their farms because of slow growth rates.
- Eating medieval weeds.
- Latest from Pavlovsk. I have no idea what’s going on anymore.
- Lactase persistence due to cold.
- Genetics says plague came from China.
Terra Madre 2010
Terra Madre 2010 is deep into its third day. I know some of our readers are there. That’s you I’m pointing at, Danny. Anyone want to give us an update?