He then implemented two new ideas. First, he planted a high number of beneficial weeds, capable of surviving in the dunes, in order to anchor the sand in place.
In 1938 he learned about the Australian Acacia longifolia, which was well adapted to the sand and the saline winds, and increased the ratio of nitrogen fixation. The Acacia was a success, and he arranged the plants so that the Acacias protected the pines from the wind.