A computer set up in a shed on the plain of Imathia is connected to humidity and nitrogen sensors in a field of peach trees. When a tree needs water, the sensor picks it up and sends a message to the computer that opens the faucet and waters it. When the sensor detects that the tree needs nutrients, it clicks another switch to release fertilizer. If necessary, it can release food and water together. While that’s going on, the farmer might be sitting in the local cafe, playing backgammon and knocking back a «farmer’s shot» as whisky was called in the good old days when the plain benefited from generous subsidies.