Table 1 Yield parameters measured on maize (Zea mays ‘CORTEVA 30K08’) plants levels of competition intensity with Parthenium hysterophorus (0, 1, 2, 4, 8, or 16 plants m−2)
From: Estimating the impact on maize production by the weed Parthenium hysterophorus in Pakistan
Weed density (Plants m−2) | Grain yield (Kg ha−1) | Cob plot−1 (No. plot−1) | Cob plant−1 (No. plant−1) | Grain row−1 (No.row−1) | Grains cob−1 (No.cob−1) | 1000grain weight (g) |
|---|---|---|---|---|---|---|
0 | 4256 ± 118a | 26.9 ± 1.1a | 1.09 ± 0.01a | 15.1 ± 0.4a | 584.6 ± 16a | 270.7 ± 6a |
1 | 3580 ± 46b | 24.8 ± 0.8ab | 1.01 ± 0.03ab | 14.9 ± 0.6a | 553.2 ± 18ab | 265.5 ± 7a |
2 | 3283 ± 76bc | 23.6 ± 0.7b | 0.98 ± 0.03ab | 14.3 ± 0.8ab | 550.0 ± 20ab | 255.5 ± 8ab |
4 | 2947 ± 124cd | 22.9 ± 0.8bc | 0.94 ± 0.04bc | 14.2 ± 0.4ab | 530.4 ± 13b | 248.4 ± 5b |
8 | 2663 ± 116de | 22.4 ± 0.9bc | 0.92 ± 0.01bc | 13.3 ± 0.4bc | 486.9 ± 15c | 243.2 ± 4b |
16 | 2273 ± 93e | 20.5 ± 0.7c | 0.85 ± 0.02c | 12.4 ± 0.4c | 463.8 ± 16c | 240.8 ± 6b |