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| crop establishment (1) |
| hand planting (1) |
| maize (1) |
| rice (1) |
| ripper planting (1) |
| third furrow planting (1) |
| crop establishment (1) |
| hand planting (1) |
| maize (1) |
| rice (1) |
| ripper planting (1) |
| third furrow planting (1) |