Table 8.
Chemistry at planting and final harvest of soil treated with a seaweed extract from Durvillaea potatorum and Ascophyllum nodosum (SE) in a strawberry trial in the fruit sector at Coldstream, Victoria, Australia
| Parameter | Planting | Final Harvest | ||||
|---|---|---|---|---|---|---|
| Untreated | SE | LSD (p = 0.05) | Untreated | SE | LSD (p = 0.05) | |
| pH (1:5 water) | 7.2 a | 7.2 a | 0.2 | 7.1 a | 7.3 a | 0.3 |
| EC (dS m−1) | 0.19 a | 0.18 a | 0.03 | 0.30 a | 0.33 a | 0.05 |
| Cl (mg kg−1) | 27 a | 30 a | 4 | 40 a | 44 a | 6 |
| Organic carbon (%) | 1.4 a | 1.4 a | 0.3 | 1.2 a | 1.4 a | 0.5 |
| CEC (cmol(+) kg−1) | 11.1 a | 11.4 a | 0.5 | 12.7 a | 12.6 a | 0.6 |
| Ca (cmol(+) kg−1) | 9.4 a | 10.0 a | 0.8 | 12.0 a | 12.3 a | 1.0 |
| Mg (cmol(+) kg−1) | 1.1 a | 1.5 a | 0.5 | 1.8 a | 1.8 a | 0.6 |
| Na (cmol(+) kg−1) | 0.09 a | 0.10 a | 0.03 | 0.12 a | 0.14 a | 0.06 |
| K (cmol(+) kg−1) | 0.9 a | 1.1 a | 0.4 | 1.3 a | 1.5 a | 0.6 |
| Ammonium-N (mg kg−1) | 0.6 a | 0.5 a | 0.3 | 0.9 a | 1.1 a | 0.5 |
| Nitrate-N (mg kg−1) | 20 a | 23 a | 5 | 43 a | 46 a | 7 |
| Phosphorus (Colwell) (mg kg−1) | 140 a | 160 a | 34 | 230 a | 250 a | 41 |
| Available K (mg kg−1) | 230 a | 250 a | 48 | 380 a | 410 a | 63 |
| Sulphate-S (mg kg−1) | 41 a | 55 a | 18 | 86 a | 90 a | 13 |
| Aluminium (mg kg−1) | 0.10 a | 0.10 a | 0.03 | 0.13 a | 0.13 a | 0.04 |
| Zn (mg kg−1) | 1.3 a | 1.3 a | 0.3 | 2.8 a | 2.9 a | 0.5 |
| Cu (mg kg−1) | 0.61 a | 0.48 a | 0.36 | 0.90 a | 0.96 a | 0.29 |
| Fe (mg kg−1) | 35 a | 31 a | 7 | 86 a | 93 a | 11 |
| Mn (mg kg−1) | 3.1 a | 3.2 a | 0.2 | 3.4 a | 3.7 a | 0.5 |
Values followed by different letters in each row and each sampling time are significantly different, where p ≤ 0.05