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Table 5 Number of studies per type of recovery and type of ecotechnology based on recovery source

From: Effectiveness of ecotechnologies in agriculture for the recovery and reuse of carbon and nutrients in the Baltic and boreo-temperate regions: a systematic map

 

C

P

N

C and P

C and N

P and N

C, P and N

Manure-based

3

18

20

1

7

26

23

Crop-based

4

1

8

1

6

3

6

Manure- and crop-based

2

2

5

 

5

6

19

Other

1

1

2

  

4

3

Number of studies

10

22

35

2

18

39

51