In September 2010 the Gates Foundation bought a big tranche of Monsanto shares (500,000 of them, worth US$23 million). The Guardian's environment reporter John Vidal seemed surprised by this, but groups such as AGRA Watch and La Via Campesina (which have been tracking the Gates Foundation's record of putting its money where its friends' mouths - and wallets - are) were not surprised, or amused.
I am currently analysing exactly what the Gates Foundation spends its money on when it claims to be 'investing in African agriculture', and finding that most of it goes to replicating the monopolistic market model favoured by Microsoft and Monsanto in the rest of the world Africa. More on that to come on this blog, but meanwhile it is worth putting on record that six months after investing heavily in Monsanto the Gates Foundation hosted a meeting in Seattle for twenty researchers working on genetically engineering cereals [1] (such as wheat, maize and rice) to fix nitrogen in the way that leguminous plants (such as peas and beans) are able to do, via a symbiotic relationship with nitrogen-fixing soil bacteria.
Why would the researchers want to create nitrogen-fixing cereals? The main reason they give is to reduce the amount of nitrogenous fertiliser currently used to make cereal crops give good yields. This would be a great thing to do, because nitrogenous pollution of water, soil and air (nitrous oxide is a much more potent greenhouse gas than carbon dioxide) is one of the huge downsides of industrial farming. It is now causing damage at a planetary level, from its contribution to greenhouse gas emissions and hence climate change, and its role in contributing to dead zones in the planet's oceans. Writing in Science on 'Spreading Dead Zones and Consequences for Marine Ecosystems' [2] Robert J. Diaz and Rutger Rosenberg say
''Dead zones in the coastal oceans have spread exponentially since the 1960s and have serious consequences for ecosystem functioning. The formation of dead zones has been exacerbated by the increase in primary production and consequent worldwide coastal eutrophication fueled by riverine runoff of fertilizers and the burning of fossil fuels. Enhanced primary production results in an accumulation of particulate organic matter, which encourages microbial activity and the consumption of dissolved oxygen in bottom waters. Dead zones have now been reported from more than 400 systems, affecting a total area of more than 245,000 square kilometers, and are probably a key stressor on marine ecosystems.''
Add to this the fact that synthetic nitrogenous fertilisers are steadily rising in price and are due to decrease in availability (because they are made from natural gas, which has almost reached its peak global production level for all time) and you can see why alternatives are urgently needed. But opinion is divided over what kind of alternatives. There are tried and true non-synthetic and non-polluting ways of fixing nitrogen in soil rather than having it run off or gas off. Leguminous cover crops are the main means. These can provide nutritious fodder for animals while growing, or, when dug in, composted or used as companion plants, become fertiliser for cereals and vegetables. Either way, they improve soil structure, protect soil life, and conserve carbon as well – none of which is achieved by synthetic fertilisers. Properly-composted animal wastes, or animal wastes thinly-spread, also add nitrogen without causing pollution. These are proven methods for achieving sustainable yields, without dead zones and other ghastly downsides. They don't cost much money or require much effort either – clover and lupin seeds are cheap, and easy to grow.
A blue lupin leguminous cover crop starting to grow in my garden, replacing the nitrogen and other nutrients lost to harvesting a crop of sweetcorn from this patch.
A blue lupin leguminous cover crop starting to grow in my garden, replacing the nitrogen and other nutrients lost to harvesting a crop of sweetcorn from this patch.
Then there are unproven, high-tech, high-cost and inevitably proprietary and possibly even monopolistic methods, which are being worked on by the researchers funded to meet in Seattle in April by the Gates Foundation.
Investigations into how legumes do their nitrogen-fixing thing, and whether and how it might be transferred to other crops, began in the early 1970s. Ray Dixon, who is currently a professor at the John Innes Centre in Britain, and who was at the Seattle meeting in April, began working on the subject then, [3] and is still working on it forty years later. Disappointingly for Gates' mates at Monsanto, it seems that the researchers are still nowhere near being able to engineer cereal seeds which would reliably fix nitrogen. Another Seattle meeting attendee, Giles Oldroyd, summed up where the science was at in a short paper, 'How close are we to nitrogen-fixing cereals?' written with his fellow scientist Myriam Charpentier in 2010. They concluded that there are still lots of things that the scientists don't know about how legumes do what they do, and similarly how the nitrogen-fixing bacteria do what they do – let alone how to genetically engineer the relevant capacities into cereals. Despite all this ignorance, they are nevertheless certain that ''...the essential role that nitrogen fixation will play in future food production necessitates a priority to start the process of cereal engineering...''
Oldroyd and Charpentier are right that nitrogen fixation will play an important role in future food production, as it has in all past food production. They are wrong that the world has a problem with nitrogen fixation that can only be solved by hideously expensive, convoluted, and slow genetic engineering means. Civilisations which have lasted for hundreds and even thousands of years have been built on naturally-occurring nitrogen sources which do not create pollution if properly used. Even a source as humble as llama dung, which powered the Inca civilisation for hundreds of years.
In any case, as Charles Merfield points out, [4] what would be the point in genetically engineering crops to have them fix an atmospheric nutrient which is not in short supply, only to run out of essential mineral nutrients (such as phosphorus and potassium), the supply of which is limited. These minerals are currently incorporated into commercial fertilisers. Like the nitrogen in these fertilisers, much is wasted and ends up washing into waterways and contributing to pollution and dead zone problems. Meanwhile the phosphorus that could be recycled from human wastes literally goes down the drain for lack of suitable large-scale collection and reuse methods, while the separation of crop and animal farming into large-scale monocultures of one or the other means that there is literally no cross-feeding and fertilisation of one to the other, as in the sustainable farming methods of the past.
If the Gates Foundation really wants to help the world grow food sustainably, it should be funding scientists who are studying this subject and educators who can take it out to the fields where the farmers are, not laboratory-based gene jockeys. Until it does so, there is only one way to describe its supposed aim of improving crop yields sustainably - horse manure.
Notes
1 See Andy Coghlan, 'Food crops to fix fertiliser from air', New Scientist, 7 May 2011, Issue 2811, pp 8-9
2 Science, 15 August 2008: Vol. 321 no. 589, pp. 926-929
3 ''In 1971, Ray Dixon, at the then Agricultural Research Council Unit of Nitrogen Fixation, University of Sussex, successfully transferred the genes responsible for nitrogen fixation by Klebsiella to Escherichia coli, so creating a new genus of nitrogen-fixing bacteria. His experiment first raised the serious possibility of using genetic manipulation to generate new kinds of nitrogen-fixing crop plants.'' (From 'Fixing the nitrogen fixers ' by John Postgate, New Scientist, 3 February 1990, Issue 1702.)
4 'No long-term fix' New Scientist, 25 May 2011, Issue 2814
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