Developing crop canopy model for irrigation of high-density olive groves by using UAV imagery

2019 ◽  
Author(s):  
E. Zancanaro ◽  
A. Gertsis ◽  
G. Vellidis ◽  
F. Marinello ◽  
F. Morari
Keyword(s):  
High Density ◽  
Crop Canopy ◽  
Olive Groves ◽  
Canopy Model

Environmental challenges of the intensive woody crops: The case of super high-density olive groves

2021 ◽  
pp. 149212
Author(s):  
José Guerrero-Casado ◽  
Antonio J. Carpio ◽  
Francisco S. Tortosa ◽  
Anastasio J. Villanueva
Keyword(s):  
High Density ◽  
Environmental Challenges ◽  
Woody Crops ◽  
Olive Groves

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.

Short-term dynamics of soil chemical parameters after application ofalperujoin high-density drip-irrigated olive groves in Argentina

2012 ◽  
Vol 69 (4) ◽  
pp. 578-588 ◽  
Author(s):  
Pablo Monetta ◽  
Luis Bueno ◽  
Vanina Cornejo ◽  
Fernando González-Aubone ◽  
Germán Babelis
Keyword(s):  
High Density ◽  
Chemical Parameters ◽  
Short Term ◽  
Olive Groves ◽  
Soil Chemical Parameters

Recruitment and attrition of associated plants under a shading crop canopy: Model selection and calibration

2009 ◽  
Vol 220 (8) ◽  
pp. 1113-1125 ◽  
Author(s):  
Eveline S.C. Stilma ◽  
Karel J. Keesman ◽  
Wopke van der Werf
Keyword(s):  
Model Selection ◽  
Crop Canopy ◽  
Canopy Model

New Missionaries

2014 ◽  
Vol 4 (4) ◽  
pp. 54-63
Author(s):  
Marc Flacks
Keyword(s):  
Olive Oil ◽  
Oil Production ◽  
High Density ◽  
Small Scale ◽  
Historical Information ◽  
Scale Family ◽  
State Senator ◽  
Olive Groves ◽  
Olive Industry ◽  
California Olive

Featuring a wide cast of players, from small-scale family-owned operations to large corporate enterprises, Flacks reports on contemporary olive oil production in California, presenting historical information, photos, and legislative testimony. Recent efforts to establish a mature California olive industry and standards, including those of the UC Davis Olive Center, the California Olive Oil Council, and state Senator Lois Wolk are described. The involvement of Spaniards in California olive oil production, from the earliest days of the state’s history, to current efforts to expand super high density olive groves, is highlighted. 

scholarly journals Creating a Field-Wide Forage Canopy Model Using UAVs and Photogrammetry Processing

2021 ◽  
Vol 13 (13) ◽  
pp. 2487
Author(s):  
Cameron Minch ◽  
Joseph Dvorak ◽  
Josh Jackson ◽  
Stuart Tucker Sheffield
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Canopy Structure ◽  
Three Dimensional ◽  
Mean Square ◽  
Crop Canopy ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Forage Crop ◽  
Flight Parameters ◽  
Canopy Model

Alfalfa canopy structure reveals useful information for managing this forage crop, but manual measurements are impractical at field-scale. Photogrammetry processing with images from Unmanned Aerial Vehicles (UAVs) can create a field-wide three-dimensional model of the crop canopy. The goal of this study was to determine the appropriate flight parameters for the UAV that would enable reliable generation of canopy models at all stages of alfalfa growth. Flights were conducted over two separate fields on four different dates using three different flight parameters. This provided a total of 24 flights. The flight parameters considered were the following: 30 m altitude with 90° camera gimbal angle, 50 m altitude with 90° camera gimbal angle, and 50 m altitude with 75° camera gimbal angle. A total of 32 three-dimensional canopy models were created using photogrammetry. Images from each of the 24 flights were used to create 24 separate models and images from multiple flights were combined to create an additional eight models. The models were analyzed based on Model Ground Sampling Distance (GSD), Model Root Mean Square Error (RMSE), and camera calibration difference. Of the 32 attempted models, 30 or 94% were judged acceptable. The models were then used to estimate alfalfa yield and the best yield estimates occurred with flights at a 50 m altitude with a 75° camera gimbal angle; therefore, these flight parameters are suggested for the most consistent results.

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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