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Precision Agriculture
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#1Saiful Azim (UCPH: University of Copenhagen)
#2Jesper Rasmussen (UCPH: University of Copenhagen)H-Index: 18
Last.S. Christensen (UCPH: University of Copenhagen)H-Index: 18
view all 6 authors...
The global spatial accuracy of ortho-mosaics based on images from consumer-grade unmanned aerial vehicles (UAVs) is relatively low. The use of ground control points (GCPs) improves the accuracy but it requires RTK-GNSS (global navigation satellite system) measurements in the field. The objective of this study was to evaluate manual geo-rectification after ortho-mosaicking as a cost-effective alternative to GCPs or UAVs equipped with RTK-GNSS. Google Earth images and A-B lines used for tractor au...
#1Francisco M. Padilla (UAL: University of Almería)H-Index: 20
#2Romina de Souza (UAL: University of Almería)H-Index: 1
Last.Richard B. Thompson (UAL: University of Almería)H-Index: 25
view all 6 authors...
Optical sensors are a promising approach for assessing nitrogen (N) status of vegetable crops. However, their potential may be undermined if time of day influences measurements. This study evaluated the effects of time of day and N addition on measurements, made with two chlorophyll meters, SPAD-502 and MC-100, and two active canopy reflectance sensors, GreenSeeker handheld and Crop Circle ACS-470. Three treatments (N1, deficient, N2, conventional, and N3, excessive N application) of N concentra...
#1Javier Clavero-Campos (UPC: Polytechnic University of Catalonia)H-Index: 3
#2Jordi Llop (UPC: Polytechnic University of Catalonia)H-Index: 9
Last.E. Gil (UPC: Polytechnic University of Catalonia)H-Index: 14
view all 7 authors...
Site-specific management of crops represents an important improvement in terms of efficiency and efficacy of the different labours, and its implementation has experienced a large development in the last decades, especially for field crops. The particular case of the spray application process for what are called “specialty crops” (vineyard, orchard fruits, citrus, olive trees, etc.) represents one of the most controversial and influential actions directly related with economical, technical, and e...
#1Hari Sharan Pathak (Central Queensland University)
#2Ph Brown (Central Queensland University)H-Index: 11
Last.Talitha Best (Central Queensland University)H-Index: 8
view all 3 authors...
For agricultural industries to capture many environmental and economic benefits that have been demonstrated for precision agriculture (PA) technologies, an understanding of the factors affecting adoption of these technologies is required to adequately inform the development of PA approaches and the programs used to promote their use. A systematic review of the literature was undertaken to explore the processes of adoption of PA technologies, using an innovation diffusion framework to analyse the...
#2Stanislas MayiIII (UEL: Universidade Estadual de Londrina)
Last.Maria de Fátima Guimarães (UEL: Universidade Estadual de Londrina)H-Index: 20
view all 9 authors...
The uniform management of soil, without considering the local soil spatial variability of its properties, may accelerate its degradation process. The objectives of this study were to: (i) delineate homogeneous management zones (HMZs) using the multivariate analysis approach, and (ii) evaluate the effect of uniform soil management on the physical–hydraulic attributes of these HMZ. The study was carried out in two fields: field 1 (F1) of 312 ha and field 2 (F2) of 297 ha. After collection of soil ...
#1Thiago Rodrigo Schossler (UFRPE: Universidade Federal Rural de Pernambuco)H-Index: 1
#2Bruno Campos Mantovanelli (UFRPE: Universidade Federal Rural de Pernambuco)H-Index: 1
Last.Maria Betânia Galvão dos Santos Freire (UFRPE: Universidade Federal Rural de Pernambuco)H-Index: 12
view all 7 authors...
Sugarcane productivity is highly variable across space, and knowledge about the spatial distribution of soil physical attributes is important to guide management practices and evaluate the effects of agricultural operations on productivity. Thus, the objective of this study was to determine the best sampling density to represent the physical attributes of an Ultisol Typic Hapludult, to determine the spatial variability of these physical attributes, and to correlate them with sugarcane productivi...
#1Taifeng Dong (AAFC: Agriculture and Agri-Food Canada)H-Index: 5
#2Jiali Shang (AAFC: Agriculture and Agri-Food Canada)H-Index: 17
Last.Yichao Shi (AAFC: Agriculture and Agri-Food Canada)
view all 16 authors...
Remote sensing has been recognized as a cost-effective way to detect the spatial and temporal variability of crop growth and productivity. In this study, multispectral RapidEye images were used to delineate homogeneous zones of soil and crop development in two fields in Ontario, Canada, one planted with canola (Brassica napus L.) and the other with spring wheat (Triticum aestivum L.). The two fields received different levels of nitrogen (N) treatments during the pre-planting land preparation pha...
#1Matt A. Yost (USU: Utah State University)H-Index: 7
#2Newell R. Kitchen (USDA: United States Department of Agriculture)H-Index: 8
Last.M. R. Volkmann (USDA: United States Department of Agriculture)
view all 7 authors...
After two decades of availability of grain yield-mapping technology, long-term trends in field-scale profitability for precision agriculture (PA) systems and conservation practices can now be assessed. Field-scale profitability of a conventional or ‘business-as-usual’ system with an annual corn (Zea mays L.)-soybean (Glycine max [L.]) rotation and annual tillage was assessed for 11 years on a 36 ha field in central Missouri during 1993 to 2003. Following this, a ‘precision agriculture system’ (P...
#1Corentin Leroux (SupAgro)H-Index: 3
#2Hazaël Jones (SupAgro)H-Index: 6
Last.Bruno Tisseyre (SupAgro)H-Index: 15
view all 5 authors...
The analysis and mapping of agronomic and environmental spatial data require observations to be comparable. Heterogeneous spatial datasets are those for which the observations of different datasets cannot be directly compared because they have not been collected under the same set of acquisition conditions, for instance within the same time period (if the variable of interest varies across time), with consistent sensors or under similar management practices (if the management practices impact th...
#1Wei Feng (Henan Agricultural University)H-Index: 8
#2Yapeng Wu (Henan Agricultural University)H-Index: 2
Last.Tiancai Guo (Henan Agricultural University)H-Index: 16
view all 9 authors...
Using hyperspectral remote sensing technology to monitor leaf area index (LAI) in a timely, fast and non-destructive manner is essential for accurate quantitative crop management. The relationships between existing vegetation indices (VIs) and LAI usually tend to saturate under dense canopies in crop production. The purpose of this study was to propose a new VI in which the estimating saturation is greatly weakened, and prediction accuracy is improved under conditions of high LAI in winter wheat...
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