According to a statement issued by the Food and Agriculture Organization of the United Nations, traditional systems of growing sand in Laurel Salt Lakes and the Great Dujaba Gardens of the Tiber District in Tunisia have been included in the list of world heritage agricultural heritage systems, administered by the Food and Agriculture Organization of the United Nations (FAO). This is the second time that Tunisian sites have been added to the list after adding the Gafsa oasis to the list in 2011. The two sites reflect the close relationship between crops and the natural ecosystem and local animals and plants, while they promote the preservation of traditional knowledge and biological diversity, which will encourage local communities to appreciate their heritage. And preserve it for future generations.

Sand cultivation practices include cultivation on sandy soil, which are unique, not only in Tunisia, but throughout the world. The displaced Andalusians established these gardens in the 17th century to adapt to the problem of lack of arable land and fresh water. These innovative practices are based on a passive irrigation system, so that the roots of the plants feed on the stored rainwater and float on the sea surface during the seasons through the movement of the tides. Traditional knowledge that has been preserved over the centuries allows farmers to conserve farmland through their careful supply of sand and organic materials, so that crops reach the correct height, allowing root irrigation with fresh water and is not affected by salt water. The green fence surrounding the lake, consisting of shrubs and fruit trees, protects cultivated land from wind and sea mist, and helps curb evaporation and repair sand. Salty lake farms are small and the main production includes potatoes, cucumbers, onions and cowpea.

The upper Dujaba gardens are located on the heights of Jabal Ghurra and constitute a unique system of innovative agriculture. At an altitude of 600 meters, farmers were able to take advantage of these mountainous lands, integrating agriculture into terraces that were formed from natural geological formations, or that were built from dry stones.

According to the FAO, hanging gardens, reinforced with an effective irrigation system, are an example of innovative and resistant agriculture that meets the nutritional needs of local communities throughout the year. Thanks to high-altitude forest conservation and the diversity of species in the tree canopy in the gardens, the top dagba enjoys its own climate in miniature. The cultivation of the fig tree is the main cultivation of this resistant and resistant multicultural system that is widely supported by livestock farming. In addition to figs, large amounts of vegetables, legumes and fruits are produced in gardens, including aubergines (potatoes, tomatoes and peppers) and cucurbits.

The quality of the products is highly appreciated, as the fig, which has the proven name of the original, fresh and dried fruits, and the manufactured products have received great local and international attention, which represents an important source of local income