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|Title:||Using Grape Leaf Reflectance for Spatially Variable Vineyard Management||Contributor(s):||Brown, Ralph B (author); Lamb, David (author)||Publication Date:||2004||Handle Link:||https://hdl.handle.net/1959.11/4558||Abstract:||Spectral reflectance of grape leaves was measured over the range of 450-2400 nm. Reflectance spectra of leaves from healthy and phylloxera-infested vines were compared and significant differences were noted in the visible part of the spectrum. A Green-Red Ratio (GRR) was evaluated to distinguish between the two groups of leaves. The GRR was also tested against leaves of different nitrogen tissue levels from otherwise healthy vines. While showing a positive correlation with leaf nitrogen content, the relationship was not significant for effective diagnostic use.||Publication Type:||Conference Publication||Conference Name:||2004 ASAE/CSAE Annual International Meeting, Ottawa, Canada, 1 - 4 August, 2004||Conference Details:||2004 ASAE/CSAE Annual International Meeting, Ottawa, Canada, 1 - 4 August, 2004||Source of Publication:||Presented at the 2004 ASAE/CSAE Annual International Meeting||Publisher:||ASABE: American Society of Agricultural and Biological Engineers||Place of Publication:||United States of America||Field of Research (FOR):||090903 Geospatial Information Systems||HERDC Category Description:||E2 Non-Refereed Scholarly Conference Publication||Other Links:||http://asae.frymulti.com/azdez.asp?search=1&JID=5&AID=17056&CID=can2004&v=&i=&T=1||Statistics to Oct 2018:||Visitors: 116
|Appears in Collections:||Conference Publication|
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