ANALYSIS OF SOME DEFICIENCIES IN CROPS OF WHEAT AND BARLEY BASED ON TERRESTRIAL AND AERIAL IMAGES PUBLISHED

C.A. Constantinescu, M.V. Herbei, D. Manea, F. Sala florin_sala@usab-tm.ro
In this study were characterized various aspects of the plants lodging and weeds of wheat and barley as compared with the normal state, through image analysis. Observations were made in stages BBCH 73 Development of fruit and BBCH 93 – Senescence at wheat crops, respectively BBCH 87 (Ripening) and BBCH 93 (Senescence) at barley crops. From the analysis of the terrestrial and aerial images (drone DJI Phantom series) spectral data were obtained in the RGB system, based on which were calculated normalized values (rgb). The data obtained were analyzed in two ways in relation to the studied aspects: plants lodging (6 variants – V1 to V6) and weeds (8 variants – V7 to V14). With respect to the lodging of wheat and barley plants, the cluster analysis method facilitated the grouping of the data into two clusters, CIL and CIIL, statistical safe, Cophenetic coefficient having the value of 0.774. The analysis has made the classification, both in relation to the two categories of crops (wheat and barley), as well as compared with the normal plants and lodging plants identified. In the situation of the second category of cases studied, was analyzed the presence of weeds in wheat and barley crops, compared to the normal status of the crops, in advanced stages of the growing season. The analysis grouped the 8 variants studied in two in clusters (CIW - V12, V13 and V14; CIIW - V7, V8, V9, V10) and a independent position (V11), in the average conditions of statistical certainty, the Cophenetic coefficient being 0.689. Regarding to the level of statistical certainty of results, it would have been higher if the analysis should have been done on each individual crop, but in the case of complex approach, the interaction of the phenomenon (plant lodging or weed, and crops), made that the safety level have lower values.
aerial images, barley, fallen crops, weeds, wheat
Sustainable Development, Environmental Engineering and Geomatics
Presentation: poster

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