caa a22 4500 445864575 CHVBK 20180317145454.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s11119-010-9189-y doi (NATIONALLICENCE)springer-10.1007/s11119-010-9189-y Delineating productivity zones in a citrus grove using citrus production, tree growth and temporally stable soil data [Elektronische Daten] [K. Mann, A. Schumann, T. Obreza] The productivity of a citrus grove with variation in tree growth was mapped to delineate zones of productivity based on several indicator properties. These properties were fruit yield, ultrasonically measured tree canopy volume, normalized difference vegetation index (NDVI), elevation and apparent electrical conductivity (ECa). The spatial patterns of soil series, soil color and ECa, and their correspondence with the variation in yield emphasized the importance of variation in the soil in differentiating the productivity of the grove. Citrus fruit yield was positively correlated with canopy volume, NDVI and ECa, and yield was negatively correlated with elevation. Although all the properties were strongly correlated with yield and were able to explain the productivity of the grove, citrus tree canopy volume was most strongly correlated (r=0.85) with yield, explaining 73% of its variation. Tree canopy volume was used to classify the citrus grove into five productivity zones termed as ‘very poor', ‘poor', ‘medium', ‘good' and ‘very good' zones. The study showed that productivity of citrus groves can be mapped using various attributes that directly or indirectly affect citrus production. The productivity zones identified could be used successfully to plan soil sampling and characterize soil variation in new fields. Springer Science+Business Media, LLC, 2010 Citrus nationallicence Soil nationallicence Variation nationallicence Productivity zone nationallicence Yield nationallicence Canopy volume nationallicence NDVI nationallicence Elevation nationallicence Apparent electrical conductivity (ECa) nationallicence Mann K. Citrus Research and Education Center, UFL, 700 Experiment Station Road, 33850, Lake Alfred, FL, USA aut Schumann A. Citrus Research and Education Center, UFL, 700 Experiment Station Road, 33850, Lake Alfred, FL, USA aut Obreza T. Soil and Water Science Department, UFL, 2169 McCarty Hall A, 32611, Gainesville, FL, USA aut Precision Agriculture Springer US; http://www.springer-ny.com 12/4(2011-08-01), 457-472 1385-2256 12:4<457 2011 12 11119 https://doi.org/10.1007/s11119-010-9189-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11119-010-9189-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mann K. Citrus Research and Education Center, UFL, 700 Experiment Station Road, 33850, Lake Alfred, FL, USA aut NATIONALLICENCE 700 1- Schumann A. Citrus Research and Education Center, UFL, 700 Experiment Station Road, 33850, Lake Alfred, FL, USA aut NATIONALLICENCE 700 1- Obreza T. Soil and Water Science Department, UFL, 2169 McCarty Hall A, 32611, Gainesville, FL, USA aut NATIONALLICENCE 773 0- Precision Agriculture Springer US; http://www.springer-ny.com 12/4(2011-08-01), 457-472 1385-2256 12:4<457 2011 12 11119 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer