Table 4 The number of studies included in the systematic map investigating amendment interventions
From: What are the effects of agricultural management on soil organic carbon in boreo-temperate systems?
Intervention | No. of studies |
|---|---|
Crop residue | 31 |
 Unspecified | 4 |
 Composted | 40 |
 Uncomposted |  |
  Green (mulch) | 16 |
  Yellow | 36 |
  Burned | 18 |
Manure | Â |
 Unspecified | 63 |
 Liquid (slurry) | 18 |
 Solid | 112 |
  Cattle | 9 |
  Poultry | 3 |
  Composted | 14 |
Lime | 9 |
Sewage sludge | 17 |
Green manure | 24 |
Peat/sediment | 10 |
Domestic compost/waste | 4 |
Processed wood (sawdust/woodchips) | 8 |
Different application methods | 1 |
Bone meal/animal products | 1 |