turning the desert into a green land
http://iranarze.ir/wp-content/uploads/2017/02/E3679.pdf "Since 2013, we have been conducting an outdoor planting experiment at two sites (with areas of approximately 550 m2 and 420m2, respectively) in the Nan’an District of Chongqing, China. Desert landform conditions were simulated in the experiment by establishing a 15-cm- to 25-cm-thick plain sand layer underlain by a 20-cm- to 30-cm-thick gravel layer on the ground. Afterward, three types of “soilized” sand layers with thicknesses of 10–20 cm, which were obtained by mixing sand with a modified sodium carboxymethyl cellulose (CMC) solution (containing 2% modified CMC and 5% com...