Influence of preplant tillage, seeding rate and weed control method on weed population and performance of wet seeded rice /
by Soepraptini Heoetadji
- Los Baños, Laguna, Cavite State University- Main Campus, 1982.
- 85 pages : illustrations ; 28 cm.
Thesis (M.S. - - Agronomy) University of the Philippines, College, Laguna.
Includes bibliographical references.
SOEPRAPTINI HEROETADJI, University of the Philippines at Los Banos, October, 1982. Influence of Preplant Tillage, Seeding Rate and Weed Control Method on Weed Population and Performance of Wet Seeded Rice. Major Professor: Dr. Basilio B. Mabbayad.
Weed population was more affected by weed control treatment than tillage system or seeding rate. Hand- weeding was the best way of decreasing weed biomass. weed control method effect was more pronounced on rice performance than tillage system or seeding rate. Grain yield of rice UPLRi-5 variety was affected by tillage system, weed control system and interaction of seeding rate and weed control method. Conventional tillage resulted in higher grain yield than those-—of stale seedbed system. | Hand Weeding once and twice did not affect grain yield which likely depended on percentage of productive tiller, and unfilled spikelets/ panicle. However, at seeding rate, of 80, 120 and 160 kg/ha, the highest grain yield was obtained from hand+ sea aes . cA wedding once which was not significantly different with handweeding twice.