Border Effects in Winter Wheat and Spring Oat Tests<sup>1</sup>

Brown, C. M.; Weibe, R. O.

doi:10.2134/agronj1957.00021962004900070011x

Cited by 8 publications

(6 citation statements)

References 2 publications

(2 reference statements)

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“…1000-grain weight was the least affected. Similar results were found by Bhalli et al (1964) and Brown & Weibel (1957).…”

Section: Discussionsupporting

confidence: 90%

Edge effects on yield, yield components and other traits in mechanized durum wheat and barley trials

Hadjichristodoulou

1983

J. Agric. Sci.

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A series of trials were conducted during 1979-82 under semi-arid conditions in a Mediterranean-type environment to study the edge effects in mechanized durum wheat and barley variety trials when uncropped pathways are left between plots. Varietal differences in edge effects on grain yield were in most trials not significant. Thus, edge effects do not distort significantly the relative ranking of varieties.Edge effects were significant for all traits studied and higher in grain and straw yields. These effects were also higher in drier seasons. The overestimation of grain yield from whole plots was 13-18% in relatively high rainfall seasons and 29% in a dry season. In two seasons the scores on the two outer rows were higher than on the two central rows by 89 and 117 % for grain yield, by 72 and 73 % for straw yield, by 44 and 48 % for numbers of tillers, by 6% for 1000-grain weight and by 14 and 40% fornumber of grains per tiller. The edge effect was not confined to the outer rows, but it extended to the inner rows of the plot; the magnitude of this effect varied with season and trait.Rows adjacent to the pathway and unprotected from wind had a lower value for all traits than the opposite rows of the pathway, which were protected by the inner rows.

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“…1000-grain weight was the least affected. Similar results were found by Bhalli et al (1964) and Brown & Weibel (1957).…”

Section: Discussionsupporting

confidence: 90%

Edge effects on yield, yield components and other traits in mechanized durum wheat and barley trials

Hadjichristodoulou

1983

J. Agric. Sci.

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“…volume weight, 1000-grain weight and oil content) the scores for the outer rows were only 0-2 % different from those for the central rows. The 1000-grain weight of cereals also showed only a small edge effect in other studies (Brown & Weibel 1957;Bhalli et al 1964;Hadjichristodoulou 1983). However, as the differences in edge effects between species for DM content, HI, volume weight, 1000-grain weight and nitrogen content of grain and straw were significant in two to eight of the ten trials, it is better to measure these characters on the central rows of the plot only.…”

Section: Discussionmentioning

confidence: 69%

Edge effects on yield, yield components and other physiological characteristics in cereals and oilseed crops

Hadjichristodoulou

1993

J. Agric. Sci.

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SUMMARYThe edge effect (calculated as the mean of the two outer rows as a percentage of the mean of the four central rows of 6-row plots) was measured in ten comparative trials conducted in Cyprus during 1987–90, with two cultivars each of rapeseed, safflower and sunflower, and one cultivar each of barley and durum wheat. Grain, straw and total biological yields obtained from the outer rows were usually higher than those obtained from the central rows by 1–384%. In one trial with sunflower, the grain yield of the outer rows was only 64% of that of the central rows, which could not be explained, considering all the other data. Differences in edge effects between species and trials were significant. Grain yield estimated from the central rows was on average 53% of that estimated from whole plots, and this varied with species and season. Therefore, in comparative trials, the outer rows should be removed before harvesting. There was no significant edge effect on the oil content of the oilseed crops. Edge effects on harvest index, volume weight, 1000-grain weight and nitrogen content were generally smaller than those on yield, and on average ranged from 100 to 113, thus the values computed from the outer rows were only 0–13% higher than from the central rows.

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“…A plottype by cultivar yield interaction was therefore possible. Such interactions were detected by Harrington (941) and Brown & Weibel (1957), but were erratice. Hall & Wallace (1975) also found yield discrepancies which suggested thar cultivar yields could be influenced by different harvesting machinery.…”

Section: Introductionmentioning

confidence: 81%

Suitability of breeders' plots and a small harvester for evaluation of spring barley

Hall¹,

Stevenson

1978

New Zealand Journal of Agricultural Research

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In three experiments with spring barley cultivars yield differences between cultivars were different for plots and drilled strips, and in breeders' plots the differences depended on whether they were harvested with a large or small header. Breeders' plots yielded about 44% more than drilled strips or 8% less than drilled. Strips of path area were allowed for. A smRll harvester was less efficient than a large one. There was no significant seasonal variation in yield with 'Zephyr' barley in drilled strips, but in breeders' plots there were significant yield differencef 267

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Border Effects in Winter Wheat and Spring Oat Tests¹

Cited by 8 publications

References 2 publications

Edge effects on yield, yield components and other traits in mechanized durum wheat and barley trials

Edge effects on yield, yield components and other traits in mechanized durum wheat and barley trials

Edge effects on yield, yield components and other physiological characteristics in cereals and oilseed crops

Suitability of breeders' plots and a small harvester for evaluation of spring barley

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Border Effects in Winter Wheat and Spring Oat Tests1

Cited by 8 publications

References 2 publications

Edge effects on yield, yield components and other traits in mechanized durum wheat and barley trials

Edge effects on yield, yield components and other traits in mechanized durum wheat and barley trials

Edge effects on yield, yield components and other physiological characteristics in cereals and oilseed crops

Suitability of breeders' plots and a small harvester for evaluation of spring barley

Contact Info

Product

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Border Effects in Winter Wheat and Spring Oat Tests¹