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- W1933014773 abstract "Crop rotation is one of the essential practices in sustainable agricultural systems, because of its effects on soil fertility and other benefits including a reduction in weed competition. A field experiment was conducted at Chaparsar Rice Research Station, Tonekabon, Iran, from 2002 to 2003 to assess the influence of crop rotation, time of planting, and tillage depth on rice (Oryza sativa L.) yield and density and the biomass of three important paddy weeds. Treatments included the crop rotations of continuous rice and rice-soybeanrice, in combinations with planting times and no tillage, minimum tillage, and chisel plowing. Crop rotation had a significant effect on the growth of barnyardgrass (Echinochloa crus-galli), arrowhead (Sagittaria sagittifolia), and water plantain (Alisma plantagoaquatica) weeds. Continuous rice planting produced the highest density of barnyardgrass, arrowhead, and water plantain weeds, compared with a rice–soybean-rice rotation. Weed biomass and weed densities were lower in the rice-soybean-rice rotation than in continuous rice. There were a 62.5 and 80% reductions in the weed density and weed biomass respectively, in the rice-soybean-rice rotation compared with continuous rice planting. Fewer barnyardgrass, arrowhead and water plantain growth were observed in no-tillage treatments than in minimum tillage and chisel. Therefore, rice yield in rotation treatments increased by 17 and 21% in 2002 and 2003, respectively, compared to continuous rice planting." @default.
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- W1933014773 date "2010-01-28" @default.
- W1933014773 modified "2023-09-26" @default.
- W1933014773 title "Effects of crop rotation and tillage depth on weed competition and yield of rice in the paddy fields of northern Iran." @default.
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