Precision Farming Applications in Florida Citrus

Whitney, J. D.; Miller, William M.; Wheaton, T. A.; Salyani, M.; Schueller, John K.

doi:10.13031/2013.5795

Cited by 40 publications

(33 citation statements)

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“…They also represent the complete information of the crop response to the management strategies adopted. Whitney et al (1999), in a pioneer project with citrus, highlighted the importance of developing fruit yield maps and including other techniques such as variable rate of fertilizers and agrochemical application for the correct adoption of PA practices.…”

Section: Yield Mapping Soil Fertility and Tree Introductionmentioning

confidence: 99%

Yield mapping, soil fertility and tree gaps in an orange orchard

Molin

Colaço²,

Carlos³

et al. 2012

Rev. Bras. Frutic.

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ABSTRACT-The current high competition on Citrus industry demands from growers new management technologies for superior efficiency and sustainability. In this context, precision agriculture (PA) has developed techniques based on yield mapping and management systems that recognize field spatial variability, which contribute to increase profitability of commercial crops. Because spatial variability is often not perceived the orange orchards are still managed as uniform and adoption of PA technology on citrus farms is low. Thus, the objective of the present study was to characterize the spatial variability of three factors: fruit yield, soil fertility and occurrence of plant gaps caused by either citrus blight or huanglongbing (HLB) in a commercial Valencia orchard in Brotas, São Paulo State, Brazil. Data from volume, geographic coordinates and representative area of the bags used on harvest were recorded to generate yield points that were then interpolated to produce the yield map. Soil chemical characteristics were studied by analyzing samples collected along planting rows and inter-rows in 24 points distributed in the field. A map of density of tree gaps was produced by georeferencing individual gaps and later by counting the number of gaps within 500 m² cells. Data were submitted to statistical and geostatistical analyses. A t test was used to compare means of soil chemical characteristics between sampling regions. High variation on yield and density of tree gaps was observed from the maps. It was also demonstrated overlapping regions of high density of plant absence and low fruit yield. Soil fertility varied depending on the sampling region in the orchard. The spatial variability found on yield, soil fertility and on disease occurrence demonstrated the importance to adopt site specific nutrient management and disease control as tools to guarantee efficiency of fruit production. Index terms: Precision agriculture, spatial variability, citrus blight, huanglongbing (HLB). MAPEAMENTO DA PRODUTIVIDADE, FERTILIDADE DO SOLO E FALHAS DE PLANTAS EM POMAR DE LARANJEIRASRESUMO -A atual competitividade existente no setor citrícola demanda dos produtores novas estratégias de manejo para aumento de eficiência e sustentabilidade. Nesse sentido, a agricultura de precisão (AP) tem desenvolvido técnicas baseadas no mapeamento de produtividade e sistemas de manejos que reconheçam a variabilidade espacial existente no campo, o que contribui para aumentar a lucratividade de pomares comerciais. Como a variabilidade espacial normalmente não é visualizada, os pomares ainda são manejados como uniformes, e a adoção das tecnologias de AP nas fazendas citrícolas é baixa. Dessa forma, o objetivo do trabalho foi carcaterizar a variabilidade espacial de três fatores: produtividade de frutos, fertilidade do solo e ocorrência de falhas de plantas causadas pelo declínio dos citros e pelo (HLB), em um talhão comercial de citros em Brotas-SP. Dados de volume, coordenadas geográficas e área de representação dos sacolões utilizados na colheita fora...

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Section: Yield Mapping Soil Fertility and Tree Introductionmentioning

confidence: 99%

Yield mapping, soil fertility and tree gaps in an orange orchard

Molin

Colaço²,

Carlos³

et al. 2012

Rev. Bras. Frutic.

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“…There are also some studies on implementing precision agriculture in perennial crops. Some theoretical work on the potential advantages of its use (Emmott et al, 1997) has been applied , specifically to citrus in Florida (Whitney et al, 1998;Schueller et al, 1999), in a banana plantation in Costa Rica (Stoorvogel & Orlich, 2000), and in vineyards in Australia (Bramley et al, 2005;Cook et al, 2006), in France (Tisseyre et al, 2005;Goutouly et al, 2006), in Chile (Ortega et al, 2003) and in Spain (Arnó et al, 2005).…”

Section: Resumen Técnicas De Precisión Para Mejorar El Manejo De Los mentioning

confidence: 99%

“…In this way a yield map of accumulated olive weight was produced in each cropping area. This method is similar to that used for citrus (Whitney et al, 1998;Schueller et al, 1999). Thus, considering that the daily harvest data were more easily managed than the data for individual points, the farm was divided into polygons.…”

Section: Isometric Curves Grid Precise Techniques For Olive Groves Ofmentioning

confidence: 99%

Precision techniques for improving the management of the olive groves of southern Spain

Alamo

Ramos

Feito

et al. 2012

Span. j. agric. res.

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Precision agriculture has progressed in integrating different techniques, but nowadays the environmental and economic benefits of implementing the concept remain unproven. This is the first study that analyzes the agronomic and economic impact of the application of precision agriculture to a specific crop. This paper presents a study applied to olive orchards at a high level of detail. The research is conducted in order to establish a methodology for integrating Geographic Information Systems (GIS) and Global Positioning System (GPS) to implement precision agriculture in a specific olive grove in southern Spain. In this study the variability of five consecutive harvests, the homogeneous areas within the farm and the composition of the crop nutrients are all analysed. Different georeferenced management areas, analysis of cost of tillage, fertilization, herbicide treatments, pruning and harvesting are integrated into a GIS. In this study it has been possible to select a zone in the exploitation knowing immediately, for example, if the leaf N content was less than 1.5% in any campaign. The results show that detailed analyses in collecting the harvest and in the use of agrochemicals help to produce reductions in their use, with the consequent savings to olive growers and, in general, environmental benefits for the whole of society.Additional key words: GIS; GPS; olive farming; precision agriculture. ResumenTécnicas de precisión para mejorar el manejo de los olivares en el sur de España La agricultura de precisión ha avanzado en la integración de diferentes técnicas, pero en la actualidad los beneficios ambientales y económicos de aplicación no se han probado. Este es el primer trabajo que analiza el impacto agronó-mico y económico de la aplicación de la agricultura de precisión a un cultivo específico. Este trabajo presenta un estudio aplicado a un olivar con un alto nivel de detalle. La investigación se lleva a cabo con el fin de establecer una metodología para la integración de Sistemas de Información Geográfica (SIG) y Sistema de Posicionamiento Global (GPS) para implementar la agricultura de precisión en un sitio específico del olivar en el sur de España. En este trabajo se han analizado la variabilidad de las cinco cosechas consecutivas, las áreas homogéneas dentro de la finca y la composición de los nutrientes de los cultivos, y se han integrado en un SIG las áreas georreferenciadas de manejo diferencial y el análisis de costo de la labranza, fertilización, tratamientos herbicidas, la poda y cosecha. Como resultado ha sido posible seleccionar una zona en la explotación y conocer inmediatamente, por ejemplo, si el contenido de N de la hoja era inferior a 1,5% en cualquier campaña. Los análisis de detalle en la recolección y en el uso de agroquí-micos ayudan a producir reducciones en el uso de los mismos, con el consiguiente ahorro a los productores aceite de oliva y, en general, los beneficios ambientales para el conjunto de la sociedad.Palabras clave adicionales: agricultura del olivar; agricultura de ...

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“…The crew leader then records the fi eld position of the tub by actuating a switch that records the GPS position of the tub. Whitney et al ( 1998 ) developed a citrus yield mapping system using a modi fi ed Crop Harvesting Tracking System (GeoFocus Inc., Gainesville, FL) ( Schueller et al 1999 ).…”

Section: Application Mapmentioning

confidence: 99%

Variable Rate Application of Fertilizer in Citrus

Chan

2012

Advances in Citrus Nutrition

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Spatially variable application of fertilizer to citrus fi elds is dependent upon accuracy of the input variables. The accuracy in determining a variable rate application map and the application accuracy are important. An accuracy model is described using a 3.6-ha Florida citrus block. The effects of boundary determination, interpolation method, and global positioning system (GPS) location errors were studied for determining a variable rate nitrogen application map based upon citrus yield maps. Accuracy models can be developed considering interaction among GPS horizontal accuracy, differential GPS (DGPS) sampling frequencies, and machine delay times of a hypothetical variable rate applicator for nitrogen (N) fertilizer application based on an application map. Parameters studied included fi ve GPS horizontal accuracy levels, two levels of DGPS horizontal accuracy, two DGPS sampling frequencies, and two machine delay times. Two integrated models were developed which documented the effects of the parameters. Machine delay time was the most important factor, and GPS horizontal accuracy was the second most important.

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Precision Farming Applications in Florida Citrus

Cited by 40 publications

References 0 publications

Yield mapping, soil fertility and tree gaps in an orange orchard

Yield mapping, soil fertility and tree gaps in an orange orchard

Precision techniques for improving the management of the olive groves of southern Spain

Variable Rate Application of Fertilizer in Citrus

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