From the Sarawak Biodiversity Centre, news of the ethnobotany garden. Dr Francis Ng reports that the half-hectare garden, which he designed, is flourishing, and that eventually he hopes to have more than 500 species — including Musa lokok, a previously unknown banana species — used by the local people on hand to study. The garden is close to the Orang Utan Centre at Semengok and has already been visited by schoolchildren. Eventually, Dr Ng says, tourists will be able to visit. Gardens of useful plants strike me as an excellent way to promote the virtues of agricultural biodiversity in a local context. I know of a couple, at Nabk in Syria and the Potato Park near Cusco, Peru, but there must be others.
Local and exotic crops in Africa
The long dry spell throughout much of February and March, caused by an unexpected El Nino that kept the main rain belt to the north of Zimbabwe, will cause serious hardship in significant areas of the country.
That’s not the only thing, of course, but an article from the Harare Herald ((Posted at allAfrica.com)) makes a plea for farmers to grow local indigenous grains such as “sorghum, mhunga and rapoko” rather than watch maize “wilt and die four years out of five”.
It is a wonderful article, making lots of good points. That food-for-work programmes should be accompanied by intensive training on growing small grains, so that those who need it most can become self-reliant in food and maybe even sell a bit for income. That modern machinery makes preparation much easier, and it isn’t expensive. That an advertising campaign could make a virtue of sadza ((Zimbabwean porridge?)) the way grandmothers made it. That there are benefits for urban consumers too. And finally, “Variety is wonderful. But we should not be rejecting indigenous grains simply because they are not “modern” or “Western”. We should be using them as well”.
I wonder whether anyone is listening?
The Ethiopian Herald, meanwhile, says green gram is becoming the crop of choice in Southern Wollo zone. A legume, green gram (Vigna radiata, maybe most familiar in the West as mung bean) improves soil fertility, ripens more rapidly and doubles or even triples incomes. One farmer is quoted as having replaced his teff crop with green gram, but if everybody does that, who is going to supply the teff flour for njera?
First study of global pollinator value
Back in October 2006 the Royal Society published an online version of a comprehensive study that was the first attempt to put a global value on pollinators. It attracted some attention back then, at The Worsted Witch, who got it from Science Daily. We missed it at the time ((Probably because the whole site was pretty new)), but as the paper version has just been published, that’s enough reason to revisit it ((Thanks to Michael Kubisch for sending the information below and the link)).
Very briefly, the article shows that 87 of the leading 115 crops depend to varying degrees on animal pollination. These 87 crops represent 35% of the world’s food production. While a few food plants are pollinated by birds or bats, the most important pollinators are, of course, honeybees, domesticated and wild. This is particularly troublesome in light of the various threats to the domesticated bee. The authors conclude that agricultural intensification jeopardizes wild bee populations and plead for more research into landscape management practices that would enhance wild bee viability.
Interestingly, I couldn’t find an actual cash value for pollination services in the article, but maybe I didn’t look hard enough.
Multiple founder effect
The common wisdom is that crops are most diverse in their centres (or secondary centres) of domestication, because that’s where people have been playing with them longest. Wild species, too, are often less diverse when they have moved to a new area. That’s down to the founder effect; a small bunch of founding individuals will have a less diversity than the population as a whole and is also more subject to random fluctuations that can change things from the original population. But on the Invasive Species Blog (via this month’s Mendel’s Garden) I recently read that reed canary grass (Phalaris arundinacea) is much more diverse in North America, where it is a recent arrival, than in Europe, its home. Genes from all over the old world are mixed up within single individuals in North America, whereas they are never found together in Europe. The reason, apparently, is that the species has been introduced many times, presumably from many places, and this has brought widely separated populations together and given the opportunity to mingle their genomes.
I wonder whether the same is true for some of the crops that have really travelled around, like tomatoes or peppers.
Competition Rules, OK
Despite the deafening silence attending the announcement of the First Great Agro.agro.biodiver.se Competition, we’re pressing ahead. So here are the rules: