A method for measurement of actue leaf injury on tobacco indicator plants.

Mortensen, Lisbeth; Weisberg, Knud V.

Full text of this article is only available in PDF format.

Silva Fennica vol. 15 no. 4 article id 5141 | 1981 | Article

Lisbeth Mortensen , Knud V. Weisberg

A method for measurement of actue leaf injury on tobacco indicator plants.

Mortensen L., Weisberg K. V. (1981). A method for measurement of actue leaf injury on tobacco indicator plants. Silva Fennica vol. 15 no. 4 article id 5141. https://doi.org/10.14214/sf.a15368

Abstract

A technique for instrumental scoring of damaged leaves on tobacco (Nicotiana tabacum) indicator plants caused by ozone in the lower atmosphere is being developed. The leaves are photographed in situ with an integrated unit, which illuminates the leaf from behind and keeps the camera in a well-defined position. By using microfilm and a minus green filter, it is possible to obtain negatives where the necrotic flecks appear as dark spots on a white leaf. The negatives are scanned in a TV-system and the size of the damaged fraction of the leaf is calculated by a microprosessor and is shown as a percentage of the leaf.

Keywords
damages; photography; measuring methods; air pollution; bioindicators; Nicotiana tabacum; leaves; damaged leaf area; ozone

Published in 1981

Available at https://doi.org/10.14214/sf.a15368 | Download PDF

Click this link to register to Silva Fennica.

If you are a registered user, log in to save your selected articles for later access.

Contents alert

Export reference to EndNote / RefWorks

Your selected articles
Send to email

Siltala P., (1987) The security of the forest Silva Fennica vol. 21 no. 4 article id 5331 (remove) | Edit comment

Maltamo M., (2022) Silva Fennica has improved publishing services b.. Silva Fennica vol. 56 no. 2 article id 10763 (remove) | Edit comment

Ilvessalo Y., (1937) Practical forest inventory methods Silva Fennica vol. no. 39 article id 4480 (remove) | Edit comment

Berg B., Gundersen P. et al. (2007) Carbon sequestration rates in Swedish forest soi.. Silva Fennica vol. 41 no. 3 article id 288 (remove) | Edit comment

Tuominen S., Pitkänen T. et al. (2017) Improving Finnish Multi-Source National Forest I.. Silva Fennica vol. 51 no. 4 article id 7743 (remove) | Edit comment

Palva L., Garam E. et al. (1998) Utilizing a multipoint measuring system of photo.. Silva Fennica vol. 32 no. 4 article id 673 (remove) | Edit comment

Chen X., Page-Dumroese D. et al. (2014) Interaction of initial litter quality and thinni.. Silva Fennica vol. 48 no. 4 article id 1211 (remove) | Edit comment

Wuori E., (1937) Administration in the forest districts of Forest.. Silva Fennica vol. no. 39 article id 4489 (remove) | Edit comment

Kiffner C., Rössiger E. et al. (2008) Probability of recent bark stripping damage by r.. Silva Fennica vol. 42 no. 1 article id 269 (remove) | Edit comment

Janfaza S., Yousefzadeh H. et al. (2017) Genetic diversity of Castanea sativa an e.. Silva Fennica vol. 51 no. 1 article id 1705 (remove) | Edit comment

Järveläinen V.-P., Riihinen P. (1979) Forestry and rural development. Silva Fennica vol. 13 no. 3 article id 5036 (remove) | Edit comment

Komsi T. J., (1953) Forestry related legal cases for forest officers Silva Fennica vol. no. 80 article id 4631 (remove) | Edit comment

Metsähallitus ., (1937) Professional development courses for foresters i.. Silva Fennica vol. no. 39 article id 4503 (remove) | Edit comment

Hoogesteger M., (1976) Changes in vegetation around refuge huts in Koil.. Silva Fennica vol. 10 no. 1 article id 4932 (remove) | Edit comment

Schmidtling R. C., (1991) Effect of rootstock and scion on flowering, grow.. Silva Fennica vol. 25 no. 4 article id 5460 (remove) | Edit comment

Mortensen L., Weisberg K. V. (1981) A method for measurement of actue leaf injury on.. Silva Fennica vol. 15 no. 4 article id 5141 (remove) | Edit comment

Your search results