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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Spatial variability in commercial orange groves. Part 2: relating canopy geometry to soil attributes and historical yield

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Colaco, Andre F. [1, 2] ; Molin, Jose P. [2] ; Rosell-Polo, Joan R. [3] ; Escola, Alexandre [3]
Total Authors: 4
[1] CSIRO, Waite Campus, Locked Bag 2, Glen Osmond, SA 5064 - Australia
[2] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Biosyst Engn Dept, Piracicaba, SP - Brazil
[3] Univ Lleida, Res Grp AgroICT & Precis Agr, Dept Agr & Forest Engn, Sch Agrifood & Forestry Sci & Engn, Agrotecnio Ctr, Lleida, Catalonia - Spain
Total Affiliations: 3
Document type: Journal article
Source: PRECISION AGRICULTURE; v. 20, n. 4, p. 805-822, AUG 2019.
Web of Science Citations: 0

Site-specific management strategies are usually dependant on the understanding of the underlying cause and effect relationships that occur at the within-field level. The assessment of canopy geometry of tree crops has been facilitated in recent years through the development of light detection and ranging sensors mounted on terrestrial platforms. The main objective of this study was to uncover the factors driving orange tree variability in commercial orange groves. Secondly, this study sought to investigate whether tree geometry information derived from a terrestrial sensing platform is useful information to guide management zones delineation in such groves. A database of soil physical attributes, elevation, historical yield and canopy geometry (canopy volume and height) was analysed in three commercial orange groves in SAo Paulo, Brazil. Canopy geometry and historical yield were correlated with soil attributes in two of the three groves evaluated; in these groves, the correlation coefficient between yield and soil/landscape information was often above 0.6, depending on the year. Zones of different tree sizes presented different historical yield and soil properties in all three groves. In conclusion, assessing canopy volume provides useful information to delineate management zones and guide enhanced site-specific management strategies. (AU)

FAPESP's process: 13/18853-0 - Laser and ultrassonic sensors for variable rate application in orange based on canopy volume
Grantee:André Freitas Colaço
Support Opportunities: Scholarships in Brazil - Doctorate