Arthropods on Abandoned Apple Trees: Comparison of Orchard Versus Alley

Occurrence of arthropods on abandoned apple trees was studied in 2010 and 2011. The research was carried out in South Moravia (Czech Republic). Two sites were selected within this area – apple trees (Malus domestica) in an alley along a road and an abandoned apple orchard. At each location, arthropods were collected from 5 separate trees. Deltamethrin was applied into the treetops using a fogger. The killed arthropods were collected 15 minutes after the application. From among the collected data, 48 families were determined in accordance with a generalized linear model with a logarithmic-link function and Poisson distribution. As a result it was found that 33 families have significantly higher abundance in the abandoned orchard and 9 families in the alley. According to the Shannon-Wiener index, diversity of families was higher in the alley in both years (2010: H’ = 3.016, 2011: H’ = 3.177) compared to the abandoned orchard (2010: H’ = 2.413, 2011: H’ = 3.007).

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Actuarial Evaluation of Late Losses: A Chain Ladder Model or a Generalized Linear Model of Rated Loss Increaments with a Poisson Distribution?

Interactive science ◽

10.21661/r-552020 ◽

2020 ◽

pp. 87-91

Author(s):

Aleksey Vladimirovich Tanyukhin

Keyword(s):

Linear Model ◽

Poisson Distribution ◽

Generalized Linear Model ◽

Incremental Development ◽

Ladder Model ◽

Poisson Distributions ◽

Chain Ladder ◽

A Chain ◽

Development Triangle

This article focuses on the equality of the estimated late losses resulting from the application of the chain ladder model to the estimates obtained on the basis of the incremental development triangle by cross-parameterizing the rated increments of losses with Poisson distributions using the generalized linear model. In this article, the formulas of the chain ladder model are derived by solving the problem of cross parameterization of rated increments of losses. Smaller accounting groups than the risk, along which the development triangle is formed, make conclusions about the possible bases for the sharing of reserves. This issue may be relevant for the further calculation of actuarial premiums.

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Asymptotics for a censored generalized linear model with unknown link function

Probability Theory and Related Fields ◽

10.1007/s00440-006-0022-5 ◽

2006 ◽

Vol 138 (1-2) ◽

pp. 235-267 ◽

Cited By ~ 8

Author(s):

Yanhua Wang ◽

Shuyuan He ◽

Lixing Zhu ◽

Kam C. Yuen

Keyword(s):

Linear Model ◽

Generalized Linear Model ◽

Link Function ◽

Unknown Link

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Modelling world energy security data from multinomial distribution by generalized linear model under different cumulative link functions

Open Chemistry ◽

10.1515/chem-2018-0053 ◽

2018 ◽

Vol 16 (1) ◽

pp. 377-385

Author(s):

Neslihan Iyit

Keyword(s):

Linear Model ◽

Energy Security ◽

Generalized Linear Model ◽

Multinomial Distribution ◽

Energy Performance ◽

Link Function ◽

Response Variable ◽

Ordinal Response ◽

Link Functions ◽

Cumulative Logit

AbstractEnergy securityis one of the major components of energy sustainability in the world’s energy performance. In this study,energy securityis taken as an ordinal response variable coming from the multinomial distribution with the energy grade levelsA,B,C, andD. Thereafter, the worldenergy securitydata is tried to be statistically modelled by usinggeneralized linear model (GLM)approach for the ordinal response variable under different cumulative link functions. The cumulative link functions comparatively used in this study are cumulative logit, cumulative probit, cumulative complementary log-log, cumulative Cauchit, and cumulative negative log-log. In order to avoid a multicollinearity problem in the data structure, principal component analysis (PCA) technique is integrated with theGLMapproach for the ordinal response variable. In this study, statistically, the importance of determining the best cumulative link function on the accuracy of parameter estimates, confidence intervals, and hypothesis tests in theGLMfor the multinomially distributed response variable is highlighted. In terms of energy evaluation, by usingcumulative logitas the best cumulative link function,energy sources consumptions,electricity productions from nuclear energy,natural gas,oil,coal,and hydroelectric,energy use per capita and energy importsare found to have statistically significant effects onenergy securityin the world’s energy performance.

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Nitrogen availability in an apple orchard with weed management

Ciência Rural ◽

10.1590/0103-8478cr20160895 ◽

2018 ◽

Vol 48 (5) ◽

Cited By ~ 1

Author(s):

Gustavo Brunetto ◽

Bruno Salvador Oliveira ◽

Vítor Gabriel Ambrosini ◽

Rafael da Rosa Couto ◽

Paula Beatriz Sete ◽

...

Keyword(s):

Soil Solution ◽

Malus Domestica ◽

Weed Management ◽

Nitrogen Availability ◽

Apple Orchard ◽

Apple Orchards ◽

Apple Trees ◽

Mineral N ◽

Potential Losses ◽

Herbicide Use

ABSTRACT: Weed management in apple orchards (Malus domestica) can affect the leaching of nitrogen (N) in soil. The study aimed to evaluate the potential leaching of N forms in soil of an apple orchard with different weed management treatments. The experiment was conducted in an apple orchard implanted in 2008. In October 2011, 80 plants were selected and the following treatments were implemented: no weed management (NM), desiccation of weeds on the tree row with herbicide use (DR) and mechanical mowing of weeds on the tree row (MR). Yield was evaluated in the 2011/2012, 2012/2013 and 2013/2014 crop seasons. In May 2012 porous cup lysimeters were installed in the NM, DR and MR treatments. In the solution collected at 0.20m, NH4 +-N and NO3 --N were analyzed sixteen times and mineral N concentration was calculated. The highest concentrations of NO3 --N and mineral N occurred in soil solution with DR, which increases availability of the nutrient to apple trees, but also enhances the potential losses. Weed management and N flow in the solution did not affect apple yield.

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