Twinned vegetable tunnels, simple polythene cover.
Saint-Rémy-de-Provence, Bouches-de-Rhône, France, July.
"I know this farm well. They grow lettuces in open-air production. The tunnels are cold, that is unheated. The advantage of this system is that there is no loss of land between the tunnels."
Pierre Villin, Richel Serres de France, Eygalières, Bouches-du-Rhône, France
in " Planting patterns ", p. 66