Table 1.
Comparison of annual economic benefits and costs between monoculture rubber plantation and intercropped rubber plantation
| Items | Monoculture rubber plantation, n = 134, Mean (SD) | Intercropped rubber plantation, n = 60, Mean (SD) | Differences |
| Costs | |||
| Pesticide, US$/ha | 60.1 (83.3) | 66.2 (85.4) | 6.1n.s |
| Fertilizer, US$/ha | 89.2 (136.8) | 114.6 (199.7) | 25.4n.s |
| Other investments, US$/ha | 0.2 (2.0) | 0.5 (4.1) | 0.3n.s |
| Subtotal, US$/ha | 149.4 (182.7) | 181.3 (247.7) | 31.9n.s |
| Benefit | |||
| Products, US$/ha | 1,845.8 (4,800.5) | 2,166.2 (5,799.0) | 320.4n.s |
| A. oxyphylla, US$/ha | — | 1,425.9 (2,885.7) | 1,425.9 |
| A. villosum Lour., US$/ha | — | 546.9 (2,032.9) | 546.9 |
| Subtotal, US$/ha | 1,845.8 (4,800.5) | 4,139.0 (8,269.2) | 2,293.2* |
| Net benefit, US$/ha | 1,696.4 (4,763.8) | 3,957.7 (8,261.9) | 2,261.3* |
An “n.s.” superscript means no statistically significant difference.
*
Significant difference at the level of P < 0.05.