Table 2. Estimated marginal means of yield (sPSA DAP 70) and calculations of overyield (RYT, Eq 2), between grasses (Gra) and legumes (Leg) across nutrient treatments.
| Fertiliser | sPSA± SE Gra | sPSA± SE Gra (Mix) | sPSA± SE Leg | sPSA± SE Leg (Mix) | Ygra:Yleg | Ygra(Mix):Yleg(Mix) | Ygra,leg:Ŷgra,leg | Ygra(Mix):Ygra (RYT) | Yleg(Mix):Yleg (RYT) |
|---|---|---|---|---|---|---|---|---|---|
| HNHP | 527.9 (24.4) de | 589.5 (30.7) ef | 548.6 (15.5) c | 596.3 (18.0) d | 0.96 | 0.98 | 1.10 | 1.11 | 1.08 |
| LNHP | 200.8 (16.8) a | 359.4 (17.9) c | 548.6 (15.5) c | 596.3 (18.0) d | 0.37 | 0.60 | 1.27 | 1.78 | 1.08 |
| HNLP | 493.3 (24.4) d | 639.9 (30.7) f | 436.6 (15.5) a | 484.2 (18.0) b | 1.12 | 1.32 | 1.20 | 1.29 | 1.10 |
| LNLP | 200.4 (16.8) a | 289.8 (17.9) b | 436.6 (15.5) a | 484.2 (18.0) b | 0.45 | 0.59 | 1.21 | 1.44 | 1.10 |
Ygra:Yleg = yield of grass vs legume in monoculture; Ygra(Mix):Yleg(Mix) yield of grass vs legume in mixture; Ygra,leg:Ŷgra,leg yield in mixed cultivation compared with expected cumulative yield of constituent species according to calculations monocultures; Ygra(Mix):Ygra yield of grass in mixture vs monoculture (RYT); Yleg(Mix):Yleg yield of legume in mixture vs monoculture (RYT). All means (kpixels) and ratios were calculated from sPSA (DAP 70) values. Different letters represent significant treatment (nutrient and cultivation) differences at α = 0.05 within species.