Table 3. Changes in stand densities, 1956–2003. DB is the Dehesa Boyal site, and PA is the Parapuños de Doña María site.   DB PA Stand densities, 1956 24.23 trees/ha 31.55 trees/ha Stand densities, 1984 23.85 trees/ha 21.23 trees/ha Stand densities, 2003 23.61 trees/ha 20.56 trees/ha