But some fast juicers don't process leafy greens well, and they don't handle fine-textured wheat grass, a popular ingredient in the juicing world.

WSJ: Home Juicing Guide: Vitamix, Hurom and Breville All Offer Advantages

They crush or press juice out of produce in a few minutes, leaving less waste behind than a fast juicer does, and they typically do a better job with tricky ingredients like wheat grass, nuts and leafy greens.

WSJ: Home Juicing Guide: Vitamix, Hurom and Breville All Offer Advantages

Around 10, 000 years ago wheat evolved from goat grass and other primitive grains.

BBC: Cambridge-based scientists develop 'superwheat'

On a more philosophical level, I love the traditions of spirit distillation, and the fact that there are usually rules, like that Scotch can only be made from barley, and rum from sugarcane, whereas vodka can be made from any ingredient in which starch can be converted to sugar, be it potatoes, wheat, rye, grass, corn, soy beans or whatever the distiller finds laying around.

FORBES: The Best Vodka I Ever Tasted

The dry conditions are already presenting challenges for those growing essential crops like wheat and means there is less grass for livestock, our correspondent added.

BBC: Heatwave sees warmest UK April for more than 100 years

That in turn would influence what they grow (elephant grass, perhaps, rather than wheat).

ECONOMIST: A prospect of plenty