Naslov
Spatial Distribution of Ambrosia Weediness in Soybean at Different Rates of Nitrogen Fertilization, based on Digital Imagery Analysis

Autori
Vuković, Ivana ; Mesić, Milan ; Bajić, Milan ; Krtalić, Andrija ; Gold, Hrvoje ; Kisić, Ivica ; Bašić, Ferdo ; Zgorelec, Željka ; Sajko, Krunoslav

Izvornik
ACS - Agriculturae conspectus scientificus (1331-7768) 72 (2007), 1; 103-111

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, prethodno priopćenje, znanstveni

Ključne riječi
ambrosia ; soybean ; digital imagery ; RGB spectrum ; image classifi cation ; spatial

Sažetak
In order to determine distribution of ambrosia within soybean at diff erent fertilization rates on experimental fi eld Potok– Popovača (2005), technique of aerial digital imaging at ground level by digital RGB camera was applied. Th e digital imaging was carried out within multidiscipline research team: Faculty of Agriculture, Faculty of Geodesy and Croatian Centre for Demining. Area of cca. 4 ha (300x130m), was under long time research with 10 diff erent rates of nitrogen fertilization. Based on interpretation of aerial digital imagery, the main object of this study was to determine ambrosia weediness in soybean at diff erent rates of nitrogen fertilization, its spatial distribution within soybean, and nitrogen taking by ambrosia and soybean. Ambrosia detection from aerial digital RGB imagery and its spatial distribution have been defi ned. Bases to continue research by airborne multispectral digital imaging of experimental fi eld within diff erent crops during following years were provided. Digital imaging of fi eld variants at diff erent fertilization rates, and ground samples (4 by experimental variant), including land surveying, was performed by digital RGB camera from 13th - 25th September, 2005. Interpretation of aerial digital imagery was made by fi eld data analysis obtained by sampling plant material, in order to determine biomass, moisture and nitrogen content in both species. Comparison with fi eld data shows that method of aerial digital RGB imagery interpretation is reliable mean of weed detection within immanent crop, and its spatial distribution at diff erent fertilization rates – ambrosia distribution/variant.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA