scholarly journals Analysis of variance of primary data on plant growth analysis

2003 ◽  
Vol 38 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Adelson Paulo Araújo
Keyword(s):  
Plant Growth ◽  
Analysis Of Variance ◽  
Growth Rates ◽  
Growth Analysis ◽  
Random Effect ◽  
Growth Conditions ◽  
Primary Data ◽  
F Test ◽  
Homogeneity Of Variances ◽  
Anova Model

Plant growth analysis presents difficulties related to statistical comparison of growth rates, and the analysis of variance of primary data could guide the interpretation of results. The objective of this work was to evaluate the analysis of variance of data from distinct harvests of an experiment, focusing especially on the homogeneity of variances and the choice of an adequate ANOVA model. Data from five experiments covering different crops and growth conditions were used. From the total number of variables, 19% were originally homoscedastic, 60% became homoscedastic after logarithmic transformation, and 21% remained heteroscedastic after transformation. Data transformation did not affect the F test in one experiment, whereas in the other experiments transformation modified the F test usually reducing the number of significant effects. Even when transformation has not altered the F test, mean comparisons led to divergent interpretations. The mixed ANOVA model, considering harvest as a random effect, reduced the number of significant effects of every factor which had the F test modified by this model. Examples illustrated that analysis of variance of primary variables provides a tool for identifying significant differences in growth rates. The analysis of variance imposes restrictions to experimental design thereby eliminating some advantages of the functional growth analysis.

An approach to the growth analysis of perennial plants

1973 ◽  
Vol 184 (1075) ◽  
pp. 217-220
Keyword(s):  
Plant Growth ◽  
Field Experiment ◽  
Growth Rates ◽  
Growth Analysis ◽  
Annual Plants ◽  
Mass Ratio ◽  
Perennial Plant ◽  
Absolute Growth ◽  
Term Field

Classical growth analysis is interpreted in the context of perennial plant growth. The inter­pretation was prompted by a long-term field experiment on apple; infrequent tree samples and the deciduous nature of apple prevented the simple quantification of growth relative to the plant’s biomass. Absolute growth rates are related to the mass of the dormant tree and from this evolves an analogue of the leaf/plant mass ratio as used in the growth analysis of annual plants.

scholarly journals Konfirmasi Dam Effect pada Sifat Berat Lahir Silangan Kambing Boer

2019 ◽  
Vol 2 (2) ◽  
pp. 137
Author(s):  
Tristianto Nugroho
Keyword(s):  
Analysis Of Variance ◽  
Random Effect ◽  
Model Analysis ◽  
Fixed Effect ◽  
Reduced Model ◽  
Data Recording ◽  
Complete Model ◽  
F Test

Dam effect merupakan pengaruh induk yang terkait dengan kemampuan induk untuk mendukung kebuntingan, produksi susu, dan kemampuan merawat anak dari lahir sampai masa sapih. Peranan dam effect adalah mendukung pertumbuhan awal anak. Penelitian ini bertujuan untuk mengkonfirmasi adanya dam effect pada sifat berat lahir (BL) pada silangan kambing Boer. Materi yang digunakan berupa data recording BL dari 1001 ekor anak kambing di CV. Kambing Burja, Batu, Jawa Timur dari tahun 2012-2016. Untuk mengetahui adanya dam effect, analisis data dilakukan dengan membandingkan dua model Analysis of Variance (ANOVA) yang berbeda. Model pertama (Model 1) disebut dengan reduced model karena faktor dam tidak digunakan dalam perhitungan, sementara model kedua (Model 2) disebut complete model karena faktor dam digunakan sebagai random effect. Pejantan, komposisi darah induk, paritas induk, jenis kelamin anak, tipe kelahiran dan tahun pengamatan digunakan sebagai fixed effect untuk kedua model tersebut. Konfirmasi adanya dam effect dilakukan dengan membandingkan kedua model menggunakan F-test for overall significance. Hasil analisis menunjukkan bahwa BL tidak dipengaruhi (p>0,05) oleh faktor komposisi darah induk, akan tetapi secara nyata (p<0,05) dipengaruhi oleh pejantan, paritas induk, jenis kelamin, tipe kelahiran dan tahun pengamatan. Pada perbandingan Model 1 dan Model 2 untuk sifat BL diperoleh perbedaan yang nyata (P<0,05). Selanjutnya dapat disimpulkan dam effect memengaruhi sifat BL, sehingga faktor induk menjadi perlu dipertimbangkan dalam proses seleksi.

scholarly journals Sense of Purpose in Life Is Associated with Lower Risk of Incident Dementia: A Meta-Analysis

2021 ◽  
pp. 1-10
Author(s):  
Angelina R. Sutin ◽  
Damaris Aschwanden ◽  
Martina Luchetti ◽  
Yannick Stephan ◽  
Antonio Terracciano
Keyword(s):  
Lower Risk ◽  
Meta Analysis ◽  
Random Effect ◽  
Purpose In Life ◽  
Population Based ◽  
Primary Data ◽  
Or Education ◽  
Total N ◽  
Sense Of Purpose ◽  
Incident Dementia

Background: A sense of purpose in life has been associated with healthier cognitive outcomes across adulthood, including risk of dementia. The robustness and replicability of this association, however, has yet to be evaluated systematically. Objective: To test whether a greater sense of purpose in life is associated with lower risk of dementia in four population-based cohorts and combined with the published literature. Methods: Random-effect meta-analysis of prospective studies (individual participant data and from the published literature identified through a systematic review) that examined sense of purpose and risk of incident dementia. Results: In six samples followed up to 17 years (four primary data and two published; total N = 53,499; n = 5,862 incident dementia), greater sense of purpose in life was associated with lower dementia risk (HR = 0.77, 95%CI = 0.73–0.81, p <  0.001). The association was generally consistent across cohorts (I2 = 47%), remained significant controlling for clinical (e.g., depression) and behavioral (e.g., physical inactivity) risk factors, and was not moderated by age, gender, or education. Conclusion: Sense of purpose is a replicable and robust predictor of lower risk of incident dementia and is a promising target of intervention for cognitive health outcomes.

scholarly journals Tolerance of Annual Winter Species to Protoporfirinogen Oxidase Inhibiting Herbicides (Protox)

2018 ◽  
Vol 36 (0) ◽  
Author(s):  
C. ALVES ◽  
L. GALON ◽  
R.R. KAIZER ◽  
F.L. WINTER ◽  
C.M. HOLZ ◽  
...  
Keyword(s):  
Leaf Area ◽  
Plant Species ◽  
Analysis Of Variance ◽  
Dry Matter ◽  
Stem Diameter ◽  
F Test ◽  
Tolerant Species ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Linear Regressions

ABSTRACT: The use of plant species for the phytoremediation of soils contaminated with herbicides is an alternative that has been emphasized to minimize the effects of the persistence of agrochemicals in the environment. The objective of this study was to evaluate the tolerance potential of winter species in soils contaminated with sulfentrazone and fomesafen. The experiment was in a completely randomized design with four replications. Doses of fomesafen (0.0, 0.125, 0.250, and 0.5 kg ha-1) and sulfentrazone (0.0, 0.3, 0.6 and 1.2 kg ha-1) were applied during the pre-emergence of phytoremediate species (black oat, vetch, birdsfood trefoil, radish and lupin). Forty five days after the emergence of the species, the phytotoxicity (%), leaf area (cm2), stalk and/or stem diameter (mm), height (cm) and dry matter (g) variables of the plants were evaluated. Data were submitted to analysis of variance by F test; when significant, linear or non linear regressions were applied to evaluate the effect of herbicide doses on the studied species. Birdsfood trefoil was the less tolerant species to fomesafen and sulfentrazone. Black oat was less affected by the application of fomesafen doses, but it was highly susceptible to sulfentrazone. Radish presented tolerance only up to the fomesafen dose of 0.25 kg ha-1; as for sulfentrazone, the species showed tolerance. The most tolerant species to fomesafen and sulfentrazone, regardless of the dose, was the lupine, which is a possible alternative for the phytoremediation of soils contaminated with these herbicides.

scholarly journals The Influence of Plant Growth Conditions on Rangeland Management in Kordofan Region

2014 ◽  
Vol 4 (8) ◽  
pp. 338-345
Author(s):  
Ibrahim Ahmed Ahmed ◽  
◽  
Gaiballa K. Abdelaziz ◽  
Lazim M. Ahmed ◽  
H. Mohammed Khalid ◽  
...  
Keyword(s):  
Plant Growth ◽  
Growth Conditions ◽  
Rangeland Management

scholarly journals Pengaruh Harga, Kualitas Pelayanan, dan Costumer Relationship Management Terhadap Keputusan Pembelian Pada Asuransi Astra (Garda OTO)

2021 ◽  
Vol 4 (2) ◽  
pp. 673-679
Author(s):  
Dhita Adriani Rangkuti ◽  
Mey Monita Lestari Manalu ◽  
Sartika Nanda Lestari ◽  
Brian Robuli ◽  
Irfan Boy Samosir
Keyword(s):  
Service Quality ◽  
Hypothesis Testing ◽  
Customer Relationship Management ◽  
Significant Influence ◽  
Relationship Management ◽  
Customer Relationship ◽  
Primary Data ◽  
Test Results ◽  
Purchasing Decisions ◽  
F Test

The purpose of this study was to determine and analyze the effect oprice, service quality, and customer relationship management on the purchase decision of Asuransi Astra Garda OtoMedan, JL.ImanBonjol. The data used are primary data obtained from the answer of 85 respondents by accidental sampling method. Data collection techniques used in this study used a questionnaire and interview technique. Data analysis techniquesin the study used linear regression, classic assumption  tests, hypothesis testing (t test and f test) and the coefficiecnt of determination. Hypothesis testing results indicate that partially (t) obtained value for t count price of 2,833 > t table 1,658 and sig value obtained 0,005<0,05 which means that price has a positive and significant influence on purchasing decisions in using Astra Insurance services (Garda Oto). Partially obtained value for service quality tcount 5.152 >ttable 1.658 and sig value obtained 0.000 <0.05 which means that service quality has a positive and significant influence on purchasing decisions in using Astra Insurance (Garda Oto) services, partially obtained value for customer relationship management t count 8.878 > 1.658 t table and the sig value obtained is 0.000 <0.05 which means that customer relationship management has a positive and significant influence on purchasing decisions in using Astra Insurance (Garda Oto) services, for the F test results obtained calculated F value = 77.769 > f table (2.69), and a significance probability of 0.000 <0.05, meaning that simultaneously prices, service quality and customer relationship management have a positive and significant effect on purchasing decisions in using Astra Insurance Services (Garda Oto). Keywords: Price, Service Quality, and Customer Relationship Management.

scholarly journals Pengaruh Pemberian Pupuk Organik Cair Nasa Dan Pupuk Kompos Terhadap Pertumbuhan Tanaman Kenaf ( Hibiscus cannabinus L)

2018 ◽  
Vol 7 (1) ◽  
pp. 6
Author(s):  
Hairin Juanda ◽  
Tutik Nugrahini ◽  
Mahdalena Mahdalena
Keyword(s):  
Plant Growth ◽  
Leaf Area ◽  
Plant Height ◽  
Analysis Of Variance ◽  
Organic Fertilizer ◽  
Hibiscus Cannabinus ◽  
Stem Diameter ◽  
Randomized Design ◽  
Number Of Leaves ◽  
Completely Randomized Design

Effect of NASA Liquid Organic Fertilizer and Compost Fertilizer on Kenaf Plant Growth (Hibiscus cannabinus L). This study aims to determine the effect of NASA POC, compost fertilizer and the interaction of NASA POC and compost fertilizer on kenaf plants. This research was carried out at East Borneo Samarinda Indonesia. with a time of ± 4 months, starting from June to September 2016. The design of the study uses factorial completely randomized design (CRD) consisting of 2 treatments and 4 replications. The treatment consists of 2 factors. The first factor is the administration of NASA POC consisting of 4 levels, namely: j0: Control (without treatment), j1: POC with a concentration of 10 ml / liter of water, j2: POC with a concentration of 15 ml / liter of water, j3: POC with a concentration of 20 ml / liter of water. The second factor is Compost fertilizer consisting of 4 levels, namely: k0: Without the provision of Compost Fertilizer, k1: Composting 500 gram / polybag, k2: Composting Fertilizer 700 grams / polybag, k3: Composting 800 grams / polybag. From the analysis of variance showed that the effect of giving NASA POC (J), compost (K) and the interaction of NASA POC and compost (JK) did not affect the parameters of plant height 30 DAP, 60 DAP and 90 DAP, stem diameter 30 DAP, 60 DAP and 90 DAP, number of leaves 30 DAP, 60 DAP and 90 DAP, leaf area 30 DAP, 60 DAP and 90 DAP. 

scholarly journals Effect of Applied Treatments on Growth Performance of three Cultivated Medicinal Plants of Kaski District, Nepal

2014 ◽  
Vol 2 (1) ◽  
pp. 31-40
Author(s):  
YP Timilsina ◽  
YP Tripathee
Keyword(s):  
Medicinal Plants ◽  
Growth Performance ◽  
Analysis Of Variance ◽  
Interdisciplinary Studies ◽  
F Test ◽  
Average Growth ◽  
Growth Performances ◽  
Open Treatment ◽  
Natural Climate

This research explores the growth performance of three potential medicinal plants namely, Bajradanti (Potentilla flugens), Chutro (Breberisaristata), and Timur (Xanthoxylumarmatum) cultivated at nursery of Institute of Forestry with the application of tunnel, shaded and open beds treatment each with 4.0 m x 1.0 m size and constant supportive facilities of manure, irrigation and care. From the measurement of ten months growth performance, B. Aristata and X. armatum showed their better growth in open bed than shed and tunnel beds, unlike P. Flugens showed better performance in shed bed. The average growth performances per month of P. fulgens and X. armatum vary significantly with respect to applied treatments (p<0.05) but converse in the case of B. aristata when using parametric F- test based on one way analysis of variance. Determined contribution of open treatment for growth performance per month in the species indicates that natural climate is tolerable as well as favorable for thorny types of medicinal plants than that of others. DOI: http://dx.doi.org/10.3126/ctbijis.v2i1.10811 Crossing the Border: International Journal of Interdisciplinary Studies Vol.2(1) 2014: 31-40

scholarly journals Abiotic Stresses Shift Belowground Populus-Associated Bacteria Toward a Core Stress Microbiome

mSystems ◽  
2018 ◽  
Vol 3 (1) ◽  
Author(s):  
Collin M. Timm ◽  
Kelsey R. Carter ◽  
Alyssa A. Carrell ◽  
Se-Ran Jun ◽  
Sara S. Jawdy ◽  
...  
Keyword(s):  
Plant Growth ◽  
Environmental Conditions ◽  
Bacterial Communities ◽  
Abiotic Stresses ◽  
Growth Conditions ◽  
Plant Host ◽  
Associated Bacteria ◽  
Poplar Trees

The identification of a common “stress microbiome” indicates tightly controlled relationships between the plant host and bacterial associates and a conserved structure in bacterial communities associated with poplar trees under different growth conditions. The ability of the microbiome to buffer the plant from extreme environmental conditions coupled with the conserved stress microbiome observed in this study suggests an opportunity for future efforts aimed at predictably modulating the microbiome to optimize plant growth.

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