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https://www.readbyqxmd.com/read/29883420/design-and-test-of-a-soil-profile-moisture-sensor-based-on-sensitive-soil-layers
#1
Zhenran Gao, Yan Zhu, Cheng Liu, Hongzhou Qian, Weixing Cao, Jun Ni
To meet the demand of intelligent irrigation for accurate moisture sensing in the soil vertical profile, a soil profile moisture sensor was designed based on the principle of high-frequency capacitance. The sensor consists of five groups of sensing probes, a data processor, and some accessory components. Low-resistivity copper rings were used as components of the sensing probes. Composable simulation of the sensor’s sensing probes was carried out using a high-frequency structure simulator. According to the effective radiation range of electric field intensity, width and spacing of copper ring were set to 30 mm and 40 mm, respectively...
May 21, 2018: Sensors
https://www.readbyqxmd.com/read/29843386/precision-agriculture-design-method-using-a-distributed-computing-architecture-on-internet-of-things-context
#2
Francisco Javier Ferrández-Pastor, Juan Manuel García-Chamizo, Mario Nieto-Hidalgo, José Mora-Martínez
The Internet of Things (IoT) has opened productive ways to cultivate soil with the use of low-cost hardware (sensors/actuators) and communication (Internet) technologies. Remote equipment and crop monitoring, predictive analytic, weather forecasting for crops or smart logistics and warehousing are some examples of these new opportunities. Nevertheless, farmers are agriculture experts but, usually, do not have experience in IoT applications. Users who use IoT applications must participate in its design, improving the integration and use...
May 28, 2018: Sensors
https://www.readbyqxmd.com/read/29774211/3d-printed-e-tongue
#3
Gabriel Gaál, Tatiana A da Silva, Vladimir Gaál, Rafael C Hensel, Lucas R Amaral, Varlei Rodrigues, Antonio Riul
Nowadays, one of the biggest issues addressed to electronic sensor fabrication is the build-up of efficient electrodes as an alternative way to the expensive, complex and multistage processes required by traditional techniques. Printed electronics arises as an interesting alternative to fulfill this task due to the simplicity and speed to stamp electrodes on various surfaces. Within this context, the Fused Deposition Modeling 3D printing is an emerging, cost-effective and alternative technology to fabricate complex structures that potentiates several fields with more creative ideas and new materials for a rapid prototyping of devices...
2018: Frontiers in Chemistry
https://www.readbyqxmd.com/read/29692033/-spatial-interpolation-model-of-soil-organic-carbon-density-considering-land-use-and-spatial-heterogeneity
#4
Zi Hao Wu, Yan Fang Liu, Yi Yun Chen, Long Guo, Qing Hu Jiang, Shao Chen Wang
Soil organic carbon pool is an important component of terrestrial carbon pool. Soil organic carbon pool and its dynamic change have important influence on carbon cycle in terrestrial ecosystem. Soil organic carbon density (SOCD) is an important parameter of soil carbon storage, and it is also an important index to evaluate farmland soil quality. Accurate prediction of regional organic carbon density spatial distribution is of great significance to the development of precision agriculture. A total of 242 farmland soil samples collected from the Jianghan Plain were used to explore the effects of land use types on the spatial distribution of SOCD in plain areas...
January 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29674259/spatial-variability-in-orchards-after-land-transformation-consequences-for-precision-agriculture-practices
#5
Asier Uribeetxebarria, Elisa Daniele, Alexandre Escolà, Jaume Arnó, José A Martínez-Casasnovas
The change from traditional to a more mechanized and technical agriculture has involved, in many cases, land transformations. This has supposed alteration of landforms and soils, with significant consequences. The effects of induced soil variability and the subsequent implications in site-specific crop management have not been sufficiently studied. The present work investigated the application of a resistivity soil sensor (Veris 3100), to map the apparent electrical conductivity (ECa), and detailed multispectral airborne images to analyse soil and crop spatial variability to assist in site-specific orchard management...
September 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29670055/a-new-vegetation-segmentation-approach-for-cropped-fields-based-on-threshold-detection-from-hue-histograms
#6
Mohamed Hassanein, Zahra Lari, Naser El-Sheimy
Over the last decade, the use of unmanned aerial vehicle (UAV) technology has evolved significantly in different applications as it provides a special platform capable of combining the benefits of terrestrial and aerial remote sensing. Therefore, such technology has been established as an important source of data collection for different precision agriculture (PA) applications such as crop health monitoring and weed management. Generally, these PA applications depend on performing a vegetation segmentation process as an initial step, which aims to detect the vegetation objects in collected agriculture fields’ images...
April 18, 2018: Sensors
https://www.readbyqxmd.com/read/29669025/spatiotemporal-dynamics-of-whitefly-bemisia-tabaci-hemiptera-aleyrodidae-in-commercial-watermelon-crops
#7
Carlos H O Lima, Renato A Sarmento, Tarcísio V S Galdino, Poliana S Pereira, Joedna Silva, Danival J Souza, Gil R Dos Santos, Thiago L Costa, Marcelo C Picanço
Spatiotemporal dynamics studies of crop pests enable the determination of the colonization pattern and dispersion of these insects in the landscape. Geostatistics is an efficient tool for these studies: to determine the spatial distribution pattern of the pest in the crops and to make maps that represent this situation. Analysis of these maps across the development of plants can be used as a tool in precision agriculture programs. Watermelon, Citrullus lanatus (Thunb.) Matsum. and Nakai (Cucurbitales: Cucurbitaceae), is the second most consumed fruit in the world, and the whitefly Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) is one of the most important pests of this crop...
April 16, 2018: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29584703/abs-smartcomagri-an-agent-based-simulator-of-smart-communication-protocols-in-wireless-sensor-networks-for-debugging-in-precision-agriculture
#8
Iván García-Magariño, Raquel Lacuesta, Jaime Lloret
Smart communication protocols are becoming a key mechanism for improving communication performance in networks such as wireless sensor networks. However, the literature lacks mechanisms for simulating smart communication protocols in precision agriculture for decreasing production costs. In this context, the current work presents an agent-based simulator of smart communication protocols for efficiently managing pesticides. The simulator considers the needs of electric power, crop health, percentage of alive bugs and pesticide consumption...
March 27, 2018: Sensors
https://www.readbyqxmd.com/read/29563961/estimation-of-vegetation-indices-for-high-throughput-phenotyping-of-wheat-using-aerial-imaging
#9
Zohaib Khan, Vahid Rahimi-Eichi, Stephan Haefele, Trevor Garnett, Stanley J Miklavcic
Background: Unmanned aerial vehicles offer the opportunity for precision agriculture to efficiently monitor agricultural land. A vegetation index (VI) derived from an aerially observed multispectral image (MSI) can quantify crop health, moisture and nutrient content. However, due to the high cost of multispectral sensors, alternate, low-cost solutions have lately received great interest. We present a novel method for model-based estimation of a VI using RGB color images. The non-linear spatio-spectral relationship between the RGB image of vegetation and the index computed by its corresponding MSI is learned through deep neural networks...
2018: Plant Methods
https://www.readbyqxmd.com/read/29491881/detection-of-bacterial-infection-in-melon-plants-by-classification-methods-based-on-imaging-data
#10
Mónica Pineda, María L Pérez-Bueno, Matilde Barón
The bacterium Dickeya dadantii is responsible of important economic losses in crop yield worldwide. In melon leaves, D. dadantii produced multiple necrotic spots surrounded by a chlorotic halo, followed by necrosis of the whole infiltrated area and chlorosis in the surrounding tissues. The extent of these symptoms, as well as the day of appearance, was dose-dependent. Several imaging techniques (variable chlorophyll fluorescence, multicolor fluorescence, and thermography) provided spatial and temporal information about alterations in the primary and secondary metabolism, as well as the stomatal activity in the infected leaves...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29481952/engineered-chitosan-based-nanomaterials-bioactivities-mechanisms-and-perspectives-in-plant-protection-and-growth
#11
REVIEW
R V Kumaraswamy, Sarita Kumari, Ram Chandra Choudhary, Ajay Pal, Ramesh Raliya, Pratim Biswas, Vinod Saharan
Excessive use of agrochemicals for enhancing crop production and its protection posed environmental and health concern. Integration of advanced technology is required to realize the concept of precision agriculture by minimizing the input of pesticides and fertilizers per unit while improving the crop productivity. Notably, chitosan based biodegradable nanomaterials (NMs) including nanoparticles, nanogels and nanocomposites have eventually proceeded as a key choice in agriculture due to their inimitable properties like antimicrobial and plant growth promoting activities...
July 1, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29393921/specim-iq-evaluation-of-a-new-miniaturized-handheld-hyperspectral-camera-and-its-application-for-plant-phenotyping-and-disease-detection
#12
Jan Behmann, Kelvin Acebron, Dzhaner Emin, Simon Bennertz, Shizue Matsubara, Stefan Thomas, David Bohnenkamp, Matheus T Kuska, Jouni Jussila, Harri Salo, Anne-Katrin Mahlein, Uwe Rascher
Hyperspectral imaging sensors are promising tools for monitoring crop plants or vegetation in different environments. Information on physiology, architecture or biochemistry of plants can be assessed non-invasively and on different scales. For instance, hyperspectral sensors are implemented for stress detection in plant phenotyping processes or in precision agriculture. Up to date, a variety of non-imaging and imaging hyperspectral sensors is available. The measuring process and the handling of most of these sensors is rather complex...
February 2, 2018: Sensors
https://www.readbyqxmd.com/read/29382177/research-on-the-effects-of-drying-temperature-on-nitrogen-detection-of-different-soil-types-by-near-infrared-sensors
#13
Pengcheng Nie, Tao Dong, Yong He, Shupei Xiao
Soil is a complicated system whose components and mechanisms are complex and difficult to be fully excavated and comprehended. Nitrogen is the key parameter supporting plant growth and development, and is the material basis of plant growth as well. An accurate grasp of soil nitrogen information is the premise of scientific fertilization in precision agriculture, where near infrared sensors are widely used for rapid detection of nutrients in soil. However, soil texture, soil moisture content and drying temperature all affect soil nitrogen detection using near infrared sensors...
January 29, 2018: Sensors
https://www.readbyqxmd.com/read/29295536/a-low-cost-approach-to-automatically-obtain-accurate-3d-models-of-woody-crops
#14
José M Bengochea-Guevara, Dionisio Andújar, Francisco L Sanchez-Sardana, Karla Cantuña, Angela Ribeiro
Crop monitoring is an essential practice within the field of precision agriculture since it is based on observing, measuring and properly responding to inter- and intra-field variability. In particular, "on ground crop inspection" potentially allows early detection of certain crop problems or precision treatment to be carried out simultaneously with pest detection. "On ground monitoring" is also of great interest for woody crops. This paper explores the development of a low-cost crop monitoring system that can automatically create accurate 3D models (clouds of coloured points) of woody crop rows...
December 24, 2017: Sensors
https://www.readbyqxmd.com/read/29207510/a-combined-approach-of-sensor-data-fusion-and-multivariate-geostatistics-for-delineation-of-homogeneous-zones-in-an-agricultural-field
#15
Annamaria Castrignanò, Gabriele Buttafuoco, Ruggiero Quarto, Carolina Vitti, Giuliano Langella, Fabio Terribile, Accursio Venezia
To assess spatial variability at the very fine scale required by Precision Agriculture, different proximal and remote sensors have been used. They provide large amounts and different types of data which need to be combined. An integrated approach, using multivariate geostatistical data-fusion techniques and multi-source geophysical sensor data to determine simple summary scale-dependent indices, is described here. These indices can be used to delineate management zones to be submitted to differential management...
December 3, 2017: Sensors
https://www.readbyqxmd.com/read/29186057/development-of-spectral-disease-indices-for-flavescence-dor%C3%A3-e-grapevine-disease-identification
#16
Hania Al-Saddik, Jean-Claude Simon, Frederic Cointault
Spectral measurements are employed in many precision agriculture applications, due to their ability to monitor the vegetation's health state. Spectral vegetation indices are one of the main techniques currently used in remote sensing activities, since they are related to biophysical and biochemical crop variables. Moreover, they have been evaluated in some studies as potentially beneficial for detecting or differentiating crop diseases. Flavescence Dorée (FD) is an infectious, incurable disease of the grapevine that can produce severe yield losses and, hence, compromise the stability of the vineyards...
November 29, 2017: Sensors
https://www.readbyqxmd.com/read/29080499/visible-and-near-infrared-spectroscopy-coupled-to-random-forest-to-quantify-some-soil-quality-parameters
#17
Felipe Bachion de Santana, André Marcelo de Souza, Ronei Jesus Poppi
This study evaluates the use of visible and near infrared spectroscopy (Vis-NIRS) combined with multivariate regression based on random forest to quantify some quality soil parameters. The parameters analyzed were soil cation exchange capacity (CEC), sum of exchange bases (SB), organic matter (OM), clay and sand present in the soils of several regions of Brazil. Current methods for evaluating these parameters are laborious, timely and require various wet analytical methods that are not adequate for use in precision agriculture, where faster and automatic responses are required...
February 15, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29053591/real-time-monitoring-of-water-content-in-sandy-soil-using-shear-mode-piezoceramic-transducers-and-active-sensing-a-feasibility-study
#18
Qingzhao Kong, Hongli Chen, Yi-Lung Mo, Gangbing Song
A quantitative understanding of soil water content or soil water status is of great importance to many applications, such as landslide monitoring, rockfill dam health monitoring, precision agriculture, etc. In this paper, a feasibility study was conducted to monitor the soil water content in real time using permanent embedded piezoceramic-based transducers called smart aggregates (SAs). An active sensing approach using a customized swept acoustic wave with a frequency range between 100 Hz and 300 kHz was used to study the wave attenuation in the soil in correlation to soil moisture levels...
October 20, 2017: Sensors
https://www.readbyqxmd.com/read/29048392/terahertz-spectroscopy-for-proximal-soil-sensing-an-approach-to-particle-size-analysis
#19
Volker Dworak, Benjamin Mahns, Jörn Selbeck, Robin Gebbers, Cornelia Weltzien
Spatially resolved soil parameters are some of the most important pieces of information for precision agriculture. These parameters, especially the particle size distribution (texture), are costly to measure by conventional laboratory methods, and thus, in situ assessment has become the focus of a new discipline called proximal soil sensing. Terahertz (THz) radiation is a promising method for nondestructive in situ measurements. The THz frequency range from 258 gigahertz (GHz) to 350 GHz provides a good compromise between soil penetration and the interaction of the electromagnetic waves with soil compounds...
October 19, 2017: Sensors
https://www.readbyqxmd.com/read/28985063/personalized-medicine-for-crops-opportunities-for-the-application-of-molecular-recognition-in-agriculture
#20
Emily Mastronardi, Carlos Monreal, Maria C DeRosa
This perspective examines the detection of rhizosphere biomarkers, namely root exudates and microbial metabolites, using molecular recognition elements such as molecularly imprinted polymers, antibodies, and aptamers. Tracking these compounds in the rhizosphere could provide valuable insight into the status of the crop and soil in a highly localized way. The outlook and potential impact of the combination of molecular recognition and other innovations such as nanotechnology and precision agriculture and the comparison to advances in personalized medicine are considered...
October 6, 2017: Journal of Agricultural and Food Chemistry
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