Table 3: Physical and physicochemical characteristics of the raw materials used: compost (SSC), almond shell (A), pumice (Pu), pozzolana (S), and sphagnum peat (P).

Raw materialspHECDry bulk density Easily available waterShrinkage
(dS m−1)(g cm−3)(%V)(%V)

SSC7.905.540.459.9313.17
A5.710.260.381.1900.00
Pu6.720.080.812.8800.00
S6.430.101.6210.4300.00
P5.620.330.136.5315.33

Data are mean values, .