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351 results

Page 1 of 18

  • Impacts of two years of autumn cover crops in northwestern Washington on winter annual weed populations
  • Steven S. Seefeldt, Toby M. Una, Don McMoran, Brian Maupin, Elizabeth Myhre, Deirdre Griffin-LaHue
  • Journal: Weed Science / Volume 71 / Issue 2 / March 2023
  • Published online by Cambridge University Press: 21 February 2023, pp. 150-159
  • View abstract

    Cover cropping is a suggested soil conservation practice widely investigated in cropping systems. Cover crops suppress weeds and often are part of an integrated weed management plan that could lead to reduced herbicide use and possibly reduce the weed seedbank. Winter brassica cover crops are popular in the eastern Washington potato (Solanum tuberosum L.) production region, but in western Washington, the production of brassica seed crops presents disease issues along with the risk of cross-pollination, which limits the use of brassica cover crops. Research for this article was conducted in two trials from 2018 to 2020 and 2019 to 2021in Mount Vernon, Washington, to identify winter cover crops compatible with regional restrictions and climatic challenges in western Washington cropping systems. Treatments including a no-cover control, eight single species (including brassicas, grasses, and legumes), and a grass–legume mixture were investigated. Cover crop and weed biomass production were measured, and percent ground cover for cover crops and weeds by species was estimated. Cover crop biomass and weed suppression varied by year due to variable environments, but annual ryegrass (Lolium multiflorum Lam.) and the mixture were most consistent in producing large amounts of biomass and reducing weed biomass and cover in all years. The variability of percent weed cover response to environment was ameliorated when weed cover was normalized within each year’s control.

  • In the “I” of the storm: Shared initials increase disaster donations
  • Jesse Chandler, Tiffany M. Griffin, Nicholas Sorensen
  • Journal: Judgment and Decision Making / Volume 3 / Issue 5 / June 2008
  • Published online by Cambridge University Press: 01 January 2023, pp. 404-410
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    People prefer their own initials to other letters, influencing preferences in many domains. The “name letter effect” (Nuttin, 1987) may not apply to negatively valenced targets if people are motivated to downplay or distance themselves from negative targets associated with the self, as previous research has shown (e.g., Finch & Cialdini, 1989). In the current research we examine the relationship between same initial preferences and negatively valenced stimuli. Specifically, we examined donations to disaster relief after seven major hurricanes to test the influence of the name letter effect with negatively valenced targets. Individuals who shared an initial with the hurricane name were overrepresented among hurricane relief donors relative to the baseline distribution of initials in the donor population. This finding suggests that people may seek to ameliorate the negative effects of a disaster when there are shared characteristics between the disaster and the self.

Page 1 of 18