The plantation included nineteen two-years old Populus spp.
clones growing in a density of 9,000plants ha1 at Antumapu
Experimental Station located in the Central Zone of Chile at
333401000S 70 3804000W and 368 m of altitude. The soil is a
Mollisol, coarse loamy over sandy, skeletal, mixed Thermic
Entic Haploxeroll, 60 cm deep, flat and well drained [14] with
28.70 mg kg1 of N; 3.27 mg kg1 of P; 125 mg kg1 of K;
25.19 mg kg1 of S; a pH of 8.24 and 2.34% of organic matter.
The site has a Mediterranean semiarid climate, with 8 dry