Is fresh farm food really that much tastier?
It's all relative.
If you eat poorly, it could be miles better.
It's so good because this is the first time in his life that he's been immersed in physical labor. It seems silly, but food really does taste better when you're tired and starving.
tired + starving + placebo that "fresh" tastes better
+desire that your life has more meaning than making a couple of kilos of the same shit anyone can buy at the supermarket