Weed control through intersow cultivation in dry-seeded rainfed rice (Oryza sativa L.) [study conducted in the Philippines]
1981
Singh, C. M. | Moody, K. | Cho, S. C.
Two interrow cultivations with a hand hoe or a high wheel cultivator plus hand weeding in the rows 14 and 28 days after rice emergence (DAE) resulted in yields which were equivalent to those from the weed free check which received four weeding. There was no significant difference in grain yield between the plots where the rolling weeder was used twice and those which were hand weeded twice but both these yielded significantly lower than the weed free check. The time required for weeding was 1, 9 and 10 percent of hand weeding when the rolling weeder, high wheel cultivator and hand hoe, respectively, were used. The net returns to weeding with these treatments were 67 dollars, 61.70 dollars, and 88.20 dollars/ha, respectively, while hand weeding in rows resulted in a lower net return to weeding. Hand weeding in rows after interrow cultivation resulted in an average yield increase of 0.5 ton/ha. Interrow cultivation plus a light hand weeding in the rows may be able to substitute for the highly labor intensive hand weeding presently used by many farmers.
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