Table 3.
Particle size distribution (without cement dissolution), pH in water (pHH2O) and available P (Pav) of the soils under integrated (INT), traditional organic (ORG) and innovative organic (ORG+) cropping systems (FieldLab-DSA3, Perugia, Italy). Numbers in parentheses are the standard errors (n=2).
| Sand | Silt | Clay | pHH2O | Pav | |
|---|---|---|---|---|---|
| % | mg kg-1 | ||||
| INT | |||||
| Ap1 | 24.2(2.2) | 42.8(1.7) | 33.0(0.6) | 7.9(0.1) | 40.9(0.8) |
| Ap2 | 26.1(0.9) | 41.4(1.0) | 32.6(0.0) | 7.8(0.0) | 31.9(4.1) |
| Bw1 | 23.8(2.3) | 43.6(2.0) | 32.6(0.3) | 7.8(0.1) | 26.9(3.5) |
| Bw2 | 21.8(0.6) | 45.2(0.0) | 33.0(0.6) | 7.9(0.0) | 14.7(2.1) |
| BC | 25.3(6.6) | 43.9(4.9) | 30.8(1.7) | 8.0(0.0) | 5.8(0.4) |
| ORG | |||||
| Ap1 | 23.3(1.6) | 43.3(1.3) | 33.4(1.6) | 7.8(0.1) | 34.8(16.3) |
| Ap2 | 24.4(0.2) | 42.3(2.8) | 33.4(0.2) | 7.9(0.0) | 25.9(6.1) |
| Bw1 | 21.4(1.8) | 42.8(1.2) | 35.7(0.6) | 7.9(0.1) | 17.7(1.2) |
| Bw2 | 27.6(7.3) | 46.5(3.1) | 25.9(7.3) | 7.8(0.1) | 17.0(2.5) |
| BC | 26.8(8.3) | 47.2(1.1) | 26.1(9.4) | 8.0(0.1) | 1.5(0.3) |
| ORG+ | |||||
| Ap1 | 26.5(6.3) | 44.3(2.7) | 29.2(3.6) | 7.6(0.1) | 36.3(1.8) |
| Ap2 | 24.7(6.1) | 44.4(1.4) | 30.9(4.6) | 7.9(0.0) | 21.2(2.3) |
| Ap3 | 25.3(4.9) | 44.4(0.7) | 30.4(4.1) | 8.0(0.1) | 20.8(0.6) |
| Bw1 | 23.7(6.0) | 45.2(2.0) | 31.0(4.0) | 8.0(0.0) | 17.9(3.3) |
| Bw2 | 23.0(4.6) | 47.8(2.1) | 29.2(2.6) | 8.0(0.0) | 15.1(3.0) |
| BC | 24.5(1.3) | 50.0(3.0) | 25.5(1.3) | 8.1(0.0) | 2.8(3.1) |