Table 6.
Soil parameters prior to sowing for years and growing areas (a), Italy; (b) USA. The soil parameters were supplied by Agriparadigma Laboratories (Ravenna, Italy).
| (a) | |||
|---|---|---|---|
| Soil Characteristics before Sowing | 2016–2017 | 2017–2018 | 2018–2019 |
| pH | 7.6 | 6.6 | 7.6 |
| Organic matter (% dm) | 1.2 | 3.3 | 3.7 |
| Total N (‰ dm) | 0.7 | 1.4 | 1.5 |
| C/N ratio | 9.7 | 13.6 | 14.7 |
| Assimilable p (mg/kg dm) | 16.9 | 8.3 | 13.8 |
| Assimilable K (mg/kg dm) | 190.1 | 178.5 | 182.3 |
| (b) | |||
| Soil Characteristics before Sowing | 2016–2017 | 2017–2018 | 2018–2019 |
| pH | 7.3 | 7.0 | 7.4 |
| Organic matter (% dm) | 1.5 | 1.8 | 2.4 |
| Total N (‰ dm) | 0.9 | 0.8 | 0.5 |
| C/N ratio | 9.6 | 13.1 | 27.9 |
| Assimilable p (mg/kg dm) | 14.2 | 12.1 | 11.6 |
| Assimilable K (mg/kg dm) | 261.1 | 239.4 | 211.9 |