A few days ago, when I was out driving, I caught a glimpse out of the corner of my eye of a scene that was actually not unfamiliar to me. A wide green field that seemed to sway gently in the wind. Well, a few months later, this sight would have been quite normal when all over the country the rice fields stretch out to the horizon. But now, in May, the rice has only just been planted and is therefore just a few centimetres high.