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Correct the Horsfall Barratt ref (that was only the abstract) and add the original, the reprint, and a review. I am unable to find |
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The '''Horsfall-Barratt scale''' <ref name=Horsfall
| last1 = Horsfall | first1 = J. G.
| last2 = Barratt | first2 = R. W.
| title = An Improved Grading System for Measuring Plant Disease. (Abstract.)
| journal = [[Phytopathology (journal)|Phytopathology]]
| publisher = [[American Phytopathological Society]]
| year = 1945
is a system used in [[plant pathology]] to assess [[Phytopathology|plant diseases]] where each plant is assigned a numerical value according to the percentage of [[leaf]] area showing disease symptoms. The Horsfall-Barratt scale was designed by [[James G. Horsfall]] and R.W. Barratt to compensate for [[human error]] (and logarithmic laws of perception) in estimating the amount of disease present. The scale is as follows:▼
| volume=35
▲| pages=655}}</ref><ref name="ISI-CC-review" /><ref name="Horsfall-1945" /><ref name="Horsfall-1978-reprint" />is a system used in [[plant pathology]] to assess [[Phytopathology|plant diseases]] where each plant is assigned a numerical value according to the percentage of [[leaf]] area showing disease symptoms. The Horsfall-Barratt scale was designed by [[James G. Horsfall]] and R.W. Barratt to compensate for [[human error]] (and logarithmic laws of perception) in estimating the amount of disease present. The scale is as follows:
{| border="1" style="text-align:center"
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== References ==
{{reflist
<ref name="ISI-CC-review">
{{cite journal
| url=http://www.garfield.library.upenn.edu/classics1986/A1986A666500001.pdf
| title=This Week's Citation Classic
| journal=[[Current Contents]]
| publisher=[[Institute for Scientific Information]]
| date=14 April 1986
| page=14
| number=15
}}
</ref>
<ref name="Horsfall-1945">
{{cite journal|last=Horsfall|first=J G|title=Fungicides and their action|location=[[Waltham, Massachusetts]]|journal=[[Chronica Botanica]]|date=1945|pages=1-239|isbn=9788172680022}} ({{google books|title=Fungicides and Their Action|id=d_gfAAAAIAAJ}})
</ref>
<ref name="Horsfall-1978-reprint">
{{cite book|last1=Horsfall|first1=J G|last2=Cowling|first2=E B|chapter=Pathometry: the measurement of plant disease|editor-last1=Horsfall|editor-first1=J G|editor-last2=Cowling|editor-first2=E B|title=Plant disease: an advanced treatise. Volume II: How disease develops in populations|location=[[New York City]]|publisher=[[Academic Press]]|date=1978|pages=119-36}}
</ref>
}}
[[Category:Plant disease scales]]
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