1971
DOI: 10.1111/j.1438-8677.1971.tb00693.x
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Direct Reading Optical Leaf Area Planimeter

Abstract: An optical planimeter is described in which the light beam from a small source is collimated and subsequently focused on a photocell. It is shown that the area of even a thin leaf placed in the collimated part of the beam is measured accurately without the need for a correction for transmitted light. The instrument features linear response, digital read-out, high speed, good stability, five ranges of 50 up to 1000 em', and an accuracy of 1% of the range.

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Cited by 13 publications
(6 citation statements)
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“…The total leaf area was measured with an optical planimeter as described by SCHURER (1971). Observations on the number and size of stomata were made microscopically from stripped epidermis taken 2-3 cm from the top of the leaves.…”
Section: Materialsandmethodsmentioning
confidence: 99%
“…The total leaf area was measured with an optical planimeter as described by SCHURER (1971). Observations on the number and size of stomata were made microscopically from stripped epidermis taken 2-3 cm from the top of the leaves.…”
Section: Materialsandmethodsmentioning
confidence: 99%
“…The leaf area was determined with the aid of an apparatus designed by the Technical and Physical Engineering Research Service (T.F.D.L.) at Wageningen, the Netherlands (SCHURER 1971).…”
Section: Methodsmentioning
confidence: 99%
“…Marking an initial point anywhere on the leaf outline the digital planimeter was moved on the same outline till marked point reached. The experiment was repeated by taking ten leaves and the readings were tabulated to calculate the mean value [10].…”
Section: Leaf Areamentioning
confidence: 99%