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- W2036703321 abstract "Producers who wish to adopt organic or pesticide-free crop production are seeking alternatives to herbicides. A field experiment was conducted at Scott, SK, from 1999 to 2001 to determine the combination of seeding date (early-May, mid-May, and late-May) and weed management system (shallow-seeded untreated, shallow-seeded with pre-emergence tillage, shallow-seeded herbicide, deep-seeded untreated, deep-seeded with pre-emergence tillage, and deep-seeded herbicide) that would optimize yield of field pea grown without the use of herbicides. The shallow and deep seeded pre-emergence tillage treatments were a 2.5-cm seeding depth followed by two sequential harrow passes and a 7.5-cm seeding depth followed by two sequential rod-weeder passes, respectively. None of the weed management systems had a significant effect on field pea density. The herbicide treatments were the only treatments that had a significant effect on weed density as the application timing was more synchronous with weed emergence than were the tillage treatments. The pre-emergence tillage treatments reduced weed biomass when seeding was delayed until mid-May following weed emergence. Deep seeding followed by pre-emergence rod-weeding was more efficacious in reducing weed fresh weight than shallow seeding followed by pre-emergence harrowing; however, they both provided similar yield responses at the mid-May seeding date. Delayed seeding until late May resulted in a 30 to 35% reduction in field pea yield compared with early or mid-May seeding, respectively. Early-seeded field peas followed by an in-crop herbicide application resulted in the highest field pea yields with the best seeding date by pre-emergence tillage combination achieving 81% of these yields. A strategy for field pea producers who choose not to use herbicides would be to delay seeding until some weeds emerge and seed at a 7.5-cm depth followed by two sequential rod-weeding passes prior to crop emergence. Key words: Field pea, seeding date, seed depth, pre-emergence tillage" @default.
- W2036703321 created "2016-06-24" @default.
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- W2036703321 date "2010-01-01" @default.
- W2036703321 modified "2023-10-16" @default.
- W2036703321 title "Pre-emergence mechanical weed control in field pea (Pisum sativum L.)" @default.
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- W2036703321 doi "https://doi.org/10.4141/cjps09049" @default.
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