scholarly journals Precision Agriculture Applications in a High Density Olive Grove Adapted for Mechanical Harvesting in Greece

2013 ◽  
Vol 8 ◽  
pp. 152-156 ◽  
Author(s):  
Athanasios Gertsis ◽  
Dimitrios Fountas ◽  
Ionel Arpasanu ◽  
Masianos Michaloudis
Keyword(s):  
Precision Agriculture ◽  
High Density ◽  
Olive Grove

Over-the-row harvester damage evaluation in super-high-density olive orchard by on-board sensing techniques

2017 ◽  
Vol 8 (2) ◽  
pp. 487-491 ◽  
Author(s):  
J. Martinez-Guanter ◽  
M. Garrido-Izard ◽  
J. Agüera ◽  
C. Valero ◽  
M. Pérez-Ruiz
Keyword(s):  
Structural Damage ◽  
Image Data ◽  
High Density ◽  
Tree Structure ◽  
Light Detection And Ranging ◽  
Olive Grove ◽  
Damage Evaluation ◽  
Olive Fruit ◽  
Before And After ◽  
Extra Stress

New Super-High-Density (SHD) olive orchards designed for mechanical harvesting are increasing very rapidly in Spain. Most studies have focused in effectively removing the olive fruit, however the machine needs to put significant amount of energy on the canopy that could result in structural damage or extra stress on the trees. During harvest, a series of 3-axis accelerometers were installed on the tree structure in order to register vibration patterns. A LiDAR (Light Detection and Ranging) and a camera sensing device were also mounted on a tractor. Before and after harvest measurements showed significant differences in the LiDAR and image data. A fast estimate of the damage produced by an over-the-row harvester with contactless sensing could be useful information for adjusting the machine parameters in each olive grove automatically in the future.

scholarly journals Landscape Characteristics Affecting Small Mammal Occurrence in Heterogeneous Olive Grove Agro-Ecosystems

Conservation ◽  
2022 ◽  
Vol 2 (1) ◽  
pp. 51-68
Author(s):  
Isabel Barão ◽  
João Queirós ◽  
Hélia Vale-Gonçalves ◽  
Joana Paupério ◽  
Ricardo Pita
Keyword(s):  
Complex Structure ◽  
High Density ◽  
Pest Species ◽  
Olive Grove ◽  
Agricultural Field ◽  
Occupancy Modelling ◽  
Landscape Characteristics ◽  
Species Of Conservation Concern ◽  
Olive Groves ◽  
Potential Pest

Understanding how small mammals (SM) are associated with environmental characteristics in olive groves is important to identify potential threats to agriculture and assess the overall conservation value and functioning of agro-ecosystems. Here, we provide first insights on this topic applied to traditional olive groves in northeast (NE) Portugal by assessing the landscape attributes that determine SM occurrence, focusing on one species of conservation concern (Microtus cabrerae Thomas 1906) and one species often perceived as a potential pest of olives (Microtus lusitanicus Gerbe 1879). Based on SM genetic non-invasive sampling in 51 olive groves and surrounding habitats, we identified seven rodent species and one insectivore. Occupancy modelling indicated that SM were generally less detected within olive groves than in surrounding habitats. The vulnerable M. cabrerae reached a mean occupancy (95% CI) of 0.77 (0.61–0.87), while M. lusitanicus stood at 0.37 (0.24–0.52). M. cabrerae was more likely to occur in land mosaics with high density of agricultural field edges, while M. lusitanicus was more associated with high density of pastureland patches. Overall, our study suggests that the complex structure and spatial heterogeneity of traditionally managed olive grove agro-ecosystems may favor the occurrence of species-rich SM communities, possibly including well-established populations of species of conservation importance, while keeping potential pest species at relatively low occupancy rates.

Assessing the accuracy of NRTK altimetric positioning for precision agriculture: test results in an olive grove environment in Southeast Spain

2018 ◽  
Vol 20 (3) ◽  
pp. 461-476 ◽  
Author(s):  
M. S. Garrido ◽  
M. C. de Lacy ◽  
M. I. Ramos ◽  
M. J. Borque ◽  
M. Susi
Keyword(s):  
Precision Agriculture ◽  
Olive Grove ◽  
Test Results ◽  
Southeast Spain

scholarly journals High-Density Wi-Fi Based Sensor Network for Efficient Irrigation Management in Precision Agriculture

2021 ◽  
Vol 11 (4) ◽  
pp. 1628
Author(s):  
Manuel Jiménez-Buendía ◽  
Fulgencio Soto-Valles ◽  
Pedro José Blaya-Ros ◽  
Ana Toledo-Moreo ◽  
Rafael Domingo-Miguel ◽  
...  
Keyword(s):  
Precision Agriculture ◽  
Deficit Irrigation ◽  
Low Cost ◽  
Irrigation Management ◽  
High Density ◽  
Solar Panels ◽  
Heterogeneous Sensors ◽  
Cloud Server ◽  
Real Time Visualization ◽  
Semi Arid

The application of deficit irrigation techniques is essential in arid or semi-arid areas of the southeast of Spain, where water is a scarce and very costly resource. However, to apply these techniques, it is necessary to carry out preliminary tests on the specific crop in order to develop the models that allow the optimization of water use while achieving acceptable yields. The system proposed in this article demonstrates the feasibility of using wireless technologies available in most facilities (Wireless Fidelity) to deploy a high-density network of nodes with a variety of heterogeneous sensors to collect data from the soil, plant, and atmosphere. The data are sent and stored in a cloud server for real-time visualization from any mobile device and further analysis. The nodes have been developed using low-cost processors and are equipped with batteries and solar panels, allowing their autonomy to be virtually unlimited, as shown by the consumption studies and tests carried out.

scholarly journals Productive and vegetative behavior of olive cultivars in super high-density olive grove

2015 ◽  
Vol 72 (1) ◽  
pp. 20-27 ◽  
Author(s):  
Primo Proietti ◽  
Luigi Nasini ◽  
Lara Reale ◽  
Tiziano Caruso ◽  
Francesco Ferranti
Keyword(s):  
High Density ◽  
Olive Grove ◽  
Olive Cultivars

Planar defects in ordered (Ga,In)P

1988 ◽  
Vol 46 ◽  
pp. 902-903
Author(s):  
S. McKernan ◽  
C. B. Carter ◽  
D. Bour ◽  
J. R. Shealy
Keyword(s):  
Electron Diffraction ◽  
Vapor Phase ◽  
Growth Direction ◽  
High Density ◽  
Ordered Structure ◽  
Planar Defects ◽  
Diffraction Patterns ◽  
Ternary Semiconductors ◽  
Anion Species ◽  
Metallic Vapor

The growth of ternary III-V semiconductors by organo-metallic vapor phase epitaxy (OMVPE) is widely practiced. It has been generally assumed that the resulting structure is the same as that of the corresponding binary semiconductors, but with the two different cation or anion species randomly distributed on their appropriate sublattice sites. Recently several different ternary semiconductors including AlxGa1-xAs, Gaxln-1-xAs and Gaxln1-xP1-6 have been observed in ordered states. A common feature of these ordered compounds is that they contain a relatively high density of defects. This is evident in electron diffraction patterns from these materials where streaks, which are typically parallel to the growth direction, are associated with the extra reflections arising from the ordering. However, where the (Ga,ln)P epilayer is reasonably well ordered the streaking is extremely faint, and the intensity of the ordered spot at 1/2(111) is much greater than that at 1/2(111). In these cases it is possible to image relatively clearly many of the defects found in the ordered structure.

Quantitative defect studies in semiconductor TEM samples prepared by low angle ion milling

1995 ◽  
Vol 53 ◽  
pp. 512-513
Author(s):  
L. Mulestagno ◽  
J.C. Holzer ◽  
P. Fraundorf
Keyword(s):  
Sample Preparation ◽  
Milling Time ◽  
High Density ◽  
Low Density ◽  
Ion Milling ◽  
High Quality ◽  
Variable Angle ◽  
Major Disadvantage ◽  
Induced Defects

Due to the wealth of information, both analytical and structural that can be obtained from it TEM always has been a favorite tool for the analysis of process-induced defects in semiconductor wafers. The only major disadvantage has always been, that the volume under study in the TEM is relatively small, making it difficult to locate low density defects, and sample preparation is a somewhat lengthy procedure. This problem has been somewhat alleviated by the availability of efficient low angle milling.Using a PIPS® variable angle ion -mill, manufactured by Gatan, we have been consistently obtaining planar specimens with a high quality thin area in excess of 5 × 104 μm2 in about half an hour (milling time), which has made it possible to locate defects at lower densities, or, for defects of relatively high density, obtain information which is statistically more significant (table 1).

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