Table 2 Characterization of farm size and production system in the three soil landscapes
Geestland (n = 9) | Peatland (n = 5) | Marshland (n = 3) | All soil landscapes (n = 17) | |
|---|---|---|---|---|
Data on production system | ||||
Agricultural area [ha] | 188 (48–313) | 151 (102–224) | 102 (62–168) | 162 (48–313) |
Grassland [%] | 59 (37–77) | 91 (75–100) | 98 (94–100) | 76 (37–100) |
Maize land [%] | 34 (19–53) | 9 (0–25) | 1 (0–3) | 21 (0–53) |
Milking cows | 242 (71–523) | 153 (94–202) | 106 (98–148) | 192 (71–523) |
Milk yield (ECM) per cow [kg] | 9368 (8286–10,365) | 7615 (5279–10,521) | 9486 (8878–10,061) | 8873 (5279–10,521) |
Maize [% DM] | 28 (11–46) | 15 (0–27) | 10 (0–15) | 21 (0–46) |
Grass [% DM] | 38 (24–51) | 51 (38–85) | 51 (42–60) | 44 (24–85) |
Concentrates [% DM] | 33 (24–43) | 34 (15–46) | 39 (35–43) | 34 (15–46) |
δ13C [‰] | P-value | |||
Cow tail hair | − 20.30 (± 0.57) b | − 22.50 (± 0.76) ab | − 24.20 (± 0.98) a | < 0.01 |
Slurry | − 23.28 (± 0.53) b | − 25.62(± 0.71) a | − 28.06 (± 0.92) a | < 0.01 |