fao.org/DOCREP/004/Y3557E/y3557e08.htm If you scroll down about half way there is a chart (titled “Cropland in use and total suitable land (million ha)”) of where the world’s arable land is. Most of it is not an Africa. Latin America, Asia, Industrialized countries have well over half the worlds potential cropland.
Wow, you really need to look closer at your source!
The FAO articles linked there extremely strongly support my positions. And you even misinterpreted the chart you’re talking about. That chart shows a tremendous amount more arable land, and it indeed shows that the great majority of it is in developing countries. That was my point–that the great majority of available cropland is in developing countries that could make vast improvements in their agricultural methods, even if they used only sustainable organic methods.
Consider these other quotes:
"Detailed analysis shows that, globally, there is enough land, soil and water, and enough potential for further growth in yields, to make the necessary production feasible. Yield growth will be slower than in the past, but at the global level this is not necessarily cause for alarm because slower growth in production is needed in the future than in the past. However, the feasible can only become the actual if the policy environment is favourable towards agriculture. …
…
It seems clear that, even if no more new technologies become available, there is still scope for increasing crop yields in line with requirements. Indeed, if just 11 of the countries that produce wheat, accounting for less than two-fifths of world production, were to bridge only half the gap between their maximum obtainable and their actual yields, then the world’s wheat output would increase by almost a quarter.
…
The study showed that even a techno-logically progressive country such as France is not yet close to reaching its maximum obtainable yield. France could obtain an average wheat yield of 8.7 tonnes per ha, rising to 11.6 tonnes per ha on her best wheat land, yet her actual average yield today is only 7.2 tonnes per ha.
…
The slower growth in production projected for the next 30 years means that yields will not need to grow as rapidly as in the past. Growth in wheat yields is projected to slow to 1.1 percent a year in the next 30 years, while rice yields are expected to rise by only 0.9 percent per year.
…
The latest World Bank projections suggest that the target of halving the proportionof people living in poverty in the developing countries by 2015 can be achieved. "
I could keep on posting the many quotes that support my position, but there’s a ton of information there and I don’t have the space.
Suffice to say that my whole point and the summary of the FAO of the UN is simple: We have PLENTY of capability with current methods to provide food for the projected increases in population, even for a much larger increase. There are localized problems and other distribution problems, but on the whole, food production is absolutely NOT a problem; we can provide for a much larger population.
Read the FAO. I consider debate on agriculture closed. My overall point has been proven.
Whatever fraction would benefit from the 130% gain, it seems that a pretty significant fraction would lose if converted to organic techniques. I personally don’t see the huge net gain that you’re claiming would take place. None of those studies you quoted say that if the whole world converted to organic farming there would be a net increase of yield.
None of them studied a whole world conversion. And where did you learn math? First, I wasn’t even suggesting that areas that can use conventional agricultural techniques (mostly the developed countries) need to switch to all organic, so there need not be any loss. Second, a 10% potential decrease in production in some areas (less than half of the world area currently under cultivation, far less than half of potential arable land) does not destroy a 30% potential increase in production in most areas.
Either way, if we are projected to go up to 10 billion people, that is well over 130% of what we have now.
6.7 billion now, add 30% of that, that’s about 9 billion, without even taking into account the larger area of land that improvement would be on, nor additional land under cultivation, nor the many other assertions of the FAO.
The green revolution is not about monoculture, a far more important innovation is the heavy use of fossil fuel based fertilizer, machinery, irrigation techniques, and genetically engineered crops. Monoculture is not what made the green revolution possible.
Intensive monoculture requires all those supporting technologies. “Monoculture” was a shorthand I used to refer to all those methods of intensive agriculture using external (name removed by moderator)uts and high capital.
And while the techniques of the green revolution are damaging and unsustainable because of their dependence on fossil fuels and soil destruction, you can’t deny that it enabled us to grow unprecedented amounts of food.
Not through purely organic farming. He is talking about how much could be supported with organic farms.
We don’t know the details behind Borlaug’s number–I suspect it’s not well-supported–and the great majority of other studies simply don’t seem to support his comments.