Table 2.
Type of soil in hill and plain orchards a.
| Soil Categories | Hill | Plain |
|---|---|---|
| % ± SEM | % ± SEM | |
| Clay | 8.7 ± 0.08 * | 8.4 ± 0.08 |
| Silt | 38 ± 0.46 *** | 46.1 ± 0.50 |
| Sandy | 53.3 ± 0.68 ** | 45.6 ± 0.94 |
| pH | 5.4 ± 0.04 *** | 6.9 ± 0.05 |
| Ppm ± | Ppm ± | |
| K | 110 ± 0.83 *** | 54.7 ± 0.44 |
| Mg | 73.7 ± 0.47 *** | 63.6 ± 0.37 |
| Ca | 1188 ± 10.29 *** | 1428 ± 15.46 |
| P | 48 ± 0.36 *** | 34 ± 0.22 |
| Total N | 2600 ± 24.02 *** | 3000 ± 27.71 |
a Asterisks after the phenolic substance’s name indicate the level of significance (One way ANOVA, Tukey’s test for pairwise comparison) in the difference between Hill and Plain extracts: * p < 0.05; ** p < 0.01; *** p < 0.001; Analyses were carried out by the “Regional laboratory for soil analysis and plant production” http://www.agriligurianet.it (accessed 21 January 2021).