An article in the latest Economist discusses the Malawi fertilizer subsidy programme. There’s been a fair amount in the media about this lately, and in particular about whether the bumper maize harvests of the past couple of years can be attributed to the extra fertilizer 1 now finding its way onto farmers’ fields increasingly sown to modern varieties, or just to better rains. I think the jury is still out on that one, but check out this statement from the piece in The Economist:
…local seed varieties, little altered from those first brought by the Portuguese centuries ago…
I don’t know about you, but I think that rather underestimates the power of natural selection, drift and recombination. Not to mention 500 growing seasons’ worth of painstaking selection by twenty generations of African farmers.
- Incidentally, there’s an interesting NY Times video on what the rising cost of fertilizers means for farmers in the US.
Not to mention that maize is an obligate outbreeder.