65 research outputs found
Use of cultivar resistance and crop rotation with Bacillus subtilis for clubroot control in canola
Non-Peer ReviewedThis study was conducted to assess additional strategies potentially complimentary to cultivar
resistance or biocontrol in control of clubroot. New granular Bacillus subtilis formulations
and a seed dressing method were developed to facilitate biofungicide delivery in field trials.
The granular formulations were applied in furrow during seeding at 50 kg/ha to a clubroot
resistant (CR) and susceptible (CS) canola cultivar, respectively, in three field trials. The seed
dressing applied approximately 1×105 to 5×106 cfu/seed doses of the biocontrol agent, and
was evaluated on the CS cultivar seeded to different crop-rotation scenarios where the plots
had a 1-year, 3-year, or 11-year break from last canola crop. Clubroot disease pressure was
high at all trial sites with disease severity indexes (DSI) ranging from 69% to 98% on the CS
cultivar. None of the granular formulations reduced clubroot substantially, whereas the CR
cultivar showed a high effect, reducing DSI to below 15% and doubling the yield over that of
CS cultivar. Plots of varying rotation showed a pattern of clubroot pathogen pressure, with
those of 1-year break from canola being the highest. The DSI for all rotational scenarios was
high, reaching 100% in short-rotation plots. Biofungicide seed dressing did not reduce DSI,
but longer crop rotation often reduced gall size slightly, showed much milder above-ground
damage, and increased the yield significantly relative to short rotation in two separate trials.
Even a 3-year break from canola was highly beneficial, with the yield doubled as opposed to
that with only 1-year break from canola
Rheology and Structure of Cornstarch Suspensions in Water-Poly(propylene glycol) Mixtures
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Computational Models of Classical Conditioning guest editors’ introduction
In the present special issue, the performance of current computational models of classical conditioning was evaluated under three requirements: (1) Models were to be tested against a list of previously agreed-upon phenomena; (2) the parameters were fixed across simulations; and (3) the simulations used to test the models had to be made available. These requirements resulted in three major products: (a) a list of fundamental classical-conditioning results for which there is a consensus about their reliability; (b) the necessary information to evaluate each of the models on the basis of its ordinal successes in accounting for the experimental data; and (c) a repository of computational models ready to generate simulations. We believe that the contents of this issue represent the 2012 state of the art in computational modeling of classical conditioning and provide a way to find promising avenues for future model development
Influence of Oil Sands Composition on Bitumen Quality During Non‐Aqueous Bitumen Extraction from the Athabasca Deposit
Robust Aqueous–Nonaqueous Hybrid Process for Bitumen Extraction from Mineable Athabasca Oil Sands
Causes and consequences of unexpected educational transitions in Switzerland
The present study examines transition patterns of Swiss secondary and tertiary school students. Switzerland's highly canalized education system allows us to test how tracking affects person-environment fit of students for students who choose a normative versus unexpected downward transition pattern. In addition, we investigate how self-efficacy expectations and personal values affect an unexpected transition choice. Results indicate that students with strong expectancies and personal values can oppose institutional norms and chart their own academic course; however, these students are less likely to perceive a good fit between their own interests and competencies and institutional demands after the transition. Our findings underscore the importance of developmentally appropriate educational environments and systems permeable enough to adapt to developing students' changing interests
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