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Table 5 The number of studies included in the systematic map investigating crop rotation interventions

From: What are the effects of agricultural management on soil organic carbon in boreo-temperate systems?

Intervention

No. of studies

Monoculture vs:

 

 Unspecified

1

 Complex rotation (4 years)

32

 Rotations involving perennials

27

 2 or 3 years rotations

105

 Rotations involving 1 year “perennials”

26

  Sewn fallow or grass

26

  Chemical or bare fallow

4

 Comparison of different crops

 

  Unspecified

1

  Legumes ± or legumes vs legumes

144

  Grass/hay/green fallow± or vs. each other

20

  Only crops

32

 Annual crop vs. perennial crop (2 years or more)

61

  Unspecified

 

 Multi cropping

20

  Under-sown/intercropping (legumes or other)

 

  Double cropping

28

  Cover- or catch crops

17

 Energy crops

 

  Energy crops vs. energy crops

9

  Energy crops vs. other crops

7

 Simple rotation (2 year) vs. complex rotations (3 years or more)

46

Total

240

  1. Interventions are catalogued in a hierarchical way, such that column one is the rotation with which columns two and three are compared. Column three details more specific sub-categories from within the category in the preceding column