Table 1 The characteristics of organic amendments added to sugarcane soils (sandy loam and clay) from Broadwater (NSW)
From: Greenhouse gas emissions from sub-tropical agricultural soils after addition of organic by-products
|  | Mill mud (MM) | Composted mill mud (CM) | High N Compost (HC) | Rice husk biochar (RB) | MM + RB (MB) |
|---|---|---|---|---|---|
pH (1:5 H2O) | 7.2 | 6.9 | 8.0 | 9.0 | ND |
Dry matter (kg) | 37,070 | 54,230 | 16,123 | 55,920 | 43,520 |
CEC (cmol(+) kg-1) | 18.8 | 15.5 | ND* | 5.6 | ND |
Total C (g kg-1) | 250 | 120 | 280 | 464 | 365 |
Labile C (g kg-1) | 1.4 | 0.1 | 5.8 | 0 | 1.0 |
Total N (g N kg-1) | 8.9 | 5.8 | 21.0 | 4.0 | 6.3 |
Mineral N (mg N kg-1) | 0 | 5.5 | 4891 | 0 | 0 |
C/N ratio | 28.1 | 20.7 | 13.3 | 116.0 | 57.7 |
Moisture (%) | 66.3 | 50.7 | 29.9 | 6.8 | 48.8 |
Total C applied (kg C ha-1) | 9,268 | 6,508 | 4,514 | 25,947 | 15,866 |
Total N applied (kg N ha-1) | 330 | 315 | 339 | 224 | 273 |
BD¶ - sandy loam (g cm–3) | 1.05 | 1.13 | 1.17 | 1.02 | 1.05 |
BD¶ - clay (g cm–3) | 0.92 | 0.97 | 1.07 | 0.92 | 0.89 |