Experiments
Structures :
Sat circulated zones made up of ground and stones mixing with inert materials (sands, schists, pozzolana) with topsoil for a good stability and a sufficiently ventilated and nutritive environment for the development of the grasses.
Six tests on the calibration and the nature of the stones, the type of topsoil and the correct proportioning between soil and stones.
Beds of seeds and sowing: In cover of the structure, mixture finer of ground and sand on a layer varying from 2 to 5 cm in order to help the lifting of the grasses.
Various sowings distributed on several small distinct pieces, tested in mixture or by isolated species
