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  • Extrapolating base-line trunk shrinkage reference equations across olive orchards.

    Author(s) : Corell, M.Girón, I. F.Moriana, A.Dell'Amico, J.Morales, D.Moreno, F.

    Author Affiliation : Escuela Técnica Superior de Ingeniería Agronómica, University of Seville, Carretera de Utrera Km 1, 41013 Sevilla, Spain.

    Author Email : mcorell@us.es

    Journal article : Agricultural Water Management 2013 Vol.126 pp.1-8

    Abstract : Maximum daily trunk shrinkageshrinkageSubject Category: Miscellaneous
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    is a common measurementmeasurementSubject Category: Techniques, Methodologies and Equipment
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    in irrigation schedulingirrigation schedulingSubject Category: Miscellaneous
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    of fruit treesfruit treesSubject Category: Organism Groups
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    . But the strong relationship between these measurements and the environment severely limit field applications. Reference baselines are the solution for understanding the influence of environmental conditions. Nevertheless, the extrapolation out of the original conditions is not clear. The aim of this study was to compare several approaches to estimate a reference baseline in an olive orchard where there were no previous data from other seasons. Two orchardsorchardsSubject Category: Miscellaneous
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    , separated 60 m, with different tree density were used. Orchard 1 had greater tree density than orchard 2, though the age and the cultivar were the same. Trunk diameters of both orchards were similar but the crown volume of orchard 2 was slightly lower than orchard 1. The current reference baselines of maximum daily trunk diameter in both orchards were not significantly different between them (p<0.05). In orchard 1, the previous reference baseline was calculated in a 5-year study (the so called multi-seasons approach). The multi-seasons approach was not significantly different in slope but it was in the γ-interception to the current reference baselines in both orchards (p<0.05). This approach over-estimated the values in both orchards. Two additional approaches were tested. These latter approaches used data before massive pit hardeninghardeningSubject Category: Miscellaneous
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    to estimate the current reference baseline. One of them used the early data to estimate a complete reference baseline (the so-called early approach). The other (the so-called γ-early approach) used the same data only to estimate the γ-interception and assumed that the slope was the same as in the multi-seasons approach. The early approach under-estimated the value of maximum daily trunk shrinkage. The early-γ approach provided a satisfactory estimationestimationSubject Category: Techniques, Methodologies and Equipment
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    of the reference baseline and improved those obtained with the multi-seasons approach. The limitations and uses in irrigation scheduling are also discussed.

    ISSN : 0378-3774

    DOI : 10.1016/j.agwat.2013.04.011

    Record Number : 20133238452

    Publisher : Elsevier Ltd

    Location of publication : Oxford

    Country of publication : UK

    Language of text : English

    Indexing terms for this abstract:

    Organism descriptor(s) : Olea europaeaolea europaeaSubject Category: Organism Names
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    , plantsplantsSubject Category: Organism Names
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    Descriptor(s) : cultivarscultivarsSubject Category: Organism Groups
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    , effectseffectsSubject Category: Properties
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    , environmental factorsenvironmental factorsSubject Category: Properties
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    , estimationestimationSubject Category: Techniques, Methodologies and Equipment
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    , fruit treesfruit treesSubject Category: Organism Groups
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    , fruitsfruitsSubject Category: Anatomical and Morphological Structures
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    , hardeninghardeningSubject Category: Miscellaneous
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    , irrigationirrigationSubject Category: Miscellaneous
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    , irrigation schedulingirrigation schedulingSubject Category: Miscellaneous
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    , measurementmeasurementSubject Category: Techniques, Methodologies and Equipment
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    , olivesolivesSubject Category: Commodities and Products
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    , orchardsorchardsSubject Category: Miscellaneous
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    , shrinkageshrinkageSubject Category: Miscellaneous
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    , treestreesSubject Category: Organism Groups
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    , waterwaterSubject Category: Chemicals and Chemical Groups
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    , water managementwater managementSubject Category: Disciplines, Occupations and Industries
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    , water relationswater relationsSubject Category: Properties
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    , woody plantswoody plantsSubject Category: Organism Groups
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    Identifier(s) : cultivated varieties, metrology, moisture relations, Oleales, water resource management, watering

    Broader term(s) : OleaoleaSubject Category: Organism Names
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    , OleaceaeoleaceaeSubject Category: Organism Names
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    , LamialeslamialesSubject Category: Organism Names
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    , eudicotseudicotsSubject Category: Organism Names
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    , angiospermsangiospermsSubject Category: Organism Names
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    , SpermatophytaspermatophytaSubject Category: Organism Names
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    , plantsplantsSubject Category: Organism Names
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    , eukaryoteseukaryotesSubject Category: Organism Names
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