Description of linden study media. Densities were measured at the end of the study. Overall standard error of density by treatment=24.69 kg/m3 excepting where single replicates had died (X); in which case the standard error = 27.04 kg/m3.
| Stone type | Stone to soil dry weight ratio | Calculated Proctor optimum density (kg/m3) | Calculated porosity (%) at Proctor optimum density | Observed dry density in kg/m3 (% Proctor optimum) | % Actual porosity | ||
|---|---|---|---|---|---|---|---|
| without hydrogel | with hydrogel | without hydrogel | with hydrogel | ||||
| Limestone | 368:1 | 2000 | 25.5 | 1789 (89%) | 1594 (80%) | 33.4 | 40.6 |
| 4.09:1 | 1987 | 26.0 | 1767 (89%) | 1571 X (79%) | 34.2 | 41.5 | |
| 4.60:1 | 1978 | 26.4 | 1748 (88%) | 1602 (81%) | 35.0 | 40.4 | |
| 5.26:1 | 1965 | 27.0 | 1638 X (83%) | 1594 X (81%) | 39.1 | 40.8 | |
| High friction | 5.47:1 | 2068 | 21.9 | 1823 (88%) | 1681 (81%) | 31.2 | 36.5 |
| 6.03:1 | 2038 | 23.1 | 1812 (89%) | 1692 (83%) | 31.6 | 36.2 | |
| 6.84:1 | 2004 | 24.4 | 1852 (92%) | 1716 (86%) | 30.1 | 35.3 | |
| 7.81:1 | 1972 | 25.6 | 1784(90%) | 1723 (87%) | 32.7 | 35.0 | |
| Solite® | 1.46:1 | 1500 | 22.8 | 1269 (85%) | 924 (62%) | 34.7 | 52.4 |
| 1.70:1 | 1414 | 25.7 | 1216(86%) | 1132 (80%) | 36.1 | 40.5 | |
| 1.78:1 | 1391 | 26.5 | 1226 (88%) | 1154 (83%) | 35.2 | 39.0 | |
| 2.09:1 | 1317 | 28.9 | 1153X (88%) | 1122 (85%) | 37.8 | 39.4 | |
| Clay loam (Ck) | — | 1674 | 35.4 | 1378X(82%) | 1248 (75%) | 46.8 | 51.8 |