Physiological potential of soybean seeds and its relationshipto electrical conductivity

Abstract: Electrical conductivity (EC) stands out among vigor tests because of its capability of detecting damage in seeds in the initial stage, since EC is related to disorganization of the cell membrane. The aim of this paper was to study use of the EC test as an alternative for vigor evaluation in soybean seeds, verifying its relationship to different vigor tests and thus suggesting values and the range of values of electrical conductivity that indicate the performance potential of a seed lot in the field. Eleven seed lots from each of four soybean cultivars were used for this study. The moisture level was determined and the following tests were performed: electrical conductivity, germination, tetrazolium, accelerated aging, first germination count, seedling vigor classification and emergence of seedlings in the field and in sand. The EC test had a significant and negative correlation (p < 0.01) with all the tests performed. Linear regression analysis allowed separation of the seed lots into classifications of very high vigor (EC ≤ 70 μS.cm-1.g-1), high vigor (EC from 71 to 90 μS.cm-1.g-1), medium vigor (EC from 91 to 110 μS.cm-1.g-1) and low vigor (EC ≥ 111 μS.cm-1.g-1).

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Accelerated aging test and its relationship to physiological potential of soybean seeds

Journal of Seed Science ◽

10.1590/2317-1545v41n3212746 ◽

2019 ◽

Vol 41 (3) ◽

pp. 301-308 ◽

Cited By ~ 1

Author(s):

Thaisa Cavalieri Matera ◽

Lucas Caiubi Pereira ◽

Alessandro Lucca Braccini ◽

Francisco Carlos Krzyzanowski ◽

Carlos Alberto Scapim ◽

...

Keyword(s):

Electrical Conductivity ◽

Linear Regression Analysis ◽

Accelerated Aging ◽

Soybean Seeds ◽

Seedling Vigor ◽

Accelerated Aging Test ◽

Randomized Experimental Design ◽

Field Emergence ◽

Physiological Tests ◽

Relationship Of

Abstract: Although accelerated aging is one of the tests most used for evaluation of the physiological quality of soybean seeds, there are few studies that relate it to other physiological tests used for the crop. In this context, the objective of this study was to investigate the relationship of accelerated aging to the results of physiological performance obtained in the vigor tests most frequently used in the soybean quality control system (germination, first count, seedling vigor classification, accelerated aging, electrical conductivity, emergence speed index, final emergence in sand substrate, and field emergence). The experiment was conducted with seeds that had different vigor levels, adopting a completely randomized experimental design with four replications. Pearson simple correlation analysis (r) and simple linear regression analysis at both 1% and 5% probability were conducted on the data. The results showed that the seedling vigor classification test (r = 0.9160) and the field emergence test (r = 0.9198) were those that best correlated with accelerated aging, followed by the germination (r = 0.8690), first count of germination (r = 0.8460), and electrical conductivity (r = 0.8912) tests.

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PRODUCTION AND PHYSIOLOGICAL QUALITY OF SOYBEAN SEEDS IN ORTHIC QUARTZARENIC NEOSOIL OF THE CERRADO REGION

Revista Caatinga ◽

10.1590/1983-21252015v28n414rc ◽

2015 ◽

Vol 28 (4) ◽

pp. 127-134

Author(s):

CHARLINE ZARATIN ALVES ◽

GUSTAVO MARTINS ZAQUEU ◽

ERIC FABIANO SERAGUZI ◽

AGUINALDO JOSÉ FREITAS LEAL ◽

JOSUÉ BISPO DA SILVA

Keyword(s):

Electrical Conductivity ◽

Aerial Part ◽

Water Distribution ◽

Accelerated Aging ◽

Dry Mass ◽

Soybean Seeds ◽

Scheme Design ◽

Physiological Quality ◽

Tetrazolium Test

ABSTRACT: The aim of this study was to evaluate the effect of the sowing periods in production, productivity component and physiological quality of seeds of three soybean cultivars (TMG133RR, P98Y70RR and NS7670RR) in Orthic Quartzarenic Neosoil in the cerrado region. The design used was a randomized block a factorial scheme design with four repetitions, and each plot with useful space consisted of three rows of four meters length, spaced at 0.45 meters. Field evaluations were the final stand, the height of the plants, height of the first pod insertion, the mass of 100 seeds and productivity. Already in the lab seeds were evaluated for germination and vigor (first germination count, emergency, emergence speed index, length and dry mass of the aerial part of the plant and roots, electrical conductivity, accelerated aging and tetrazolium test). It concludes that it is possible to use Orthic Quartzarenic Neosoils, located in the Cerrado region at altitudes higher than 600 m, in years and places with good water distribution in the spring-summer seasons, for grain and soybeans production, but as a first goal, the crop should be sown in the first 20 days of November otherwise it should take place in early December.

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Is it possible to estimate longevity through the analyses used to measure the initial physiological potential in soybean seeds?

Journal of Seed Science ◽

10.1590/2317-1545v43249697 ◽

2021 ◽

Vol 43 ◽

Author(s):

Thiago Barbosa Batista ◽

Samara Moreira Perissato ◽

Carlos Henrique Queiroz Rego ◽

Gustavo Roberto Fonseca de Oliveira ◽

Fernando Augusto Henning ◽

...

Keyword(s):

Electrical Conductivity ◽

Linear Regression ◽

Soybean Seed ◽

Accelerated Aging ◽

Storage Period ◽

High Potential ◽

Seed Longevity ◽

Soybean Seeds ◽

Radicle Protrusion ◽

Over Time

Abstract: The analysis of longevity can support decisions about the length of seed lot storage until commercialization, since this characteristic implies the maintenance of viability over time. Seed longevity is analyzed by the p50 test, which expresses the time to lose 50% of the initial viability. Seeds with high vigor and germination have greater physiological potential and, thus, a greater capacity to maintain quality throughout the storage period. However, there has been little research on the correlations between the analysis of p50 (longevity) and the tests used to measure physiological potential (germination and vigor) of lots, which can be used as a tool to make inferences about longevity using the most traditional tests. Thus, the objective of this study was to investigate which tests used to measure the potential of lots can estimate p50. To this end, germination and vigor were evaluated using traditional tests while longevity was assessed in eight soybean seed lots. Correlations and linear regression were tested for the traditional variables versus p50. It was found that the use of accelerated aging, electrical conductivity, and time to 50% radicle protrusion has high potential to estimate longevity as measured by p50.

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Cluster and regression analysis for predicting salinity in groundwater

MATEC Web of Conferences ◽

10.1051/matecconf/201819202007 ◽

2018 ◽

Vol 192 ◽

pp. 02007

Author(s):

Phiraphat Aphiphan ◽

Uma Seeboonruang ◽

Somyot Kaitwanidvilai

Keyword(s):

Electrical Conductivity ◽

Regression Analysis ◽

Linear Regression ◽

Regression Model ◽

Multiple Linear Regression ◽

Linear Regression Analysis ◽

Multiple Linear Regression Analysis ◽

Water Levels ◽

Groundwater Salinity ◽

Groundwater Levels

Groundwater salinity is a major problem particularly in the northeastern region of Thailand. Saline groundwater can cause widespread saline soil problem resulting in reducing agricultural productivity as in the Lower Nam Kam River Basin. In order to better manage the salinity problem, it is important to be able to predict the groundwater salinity. The objective of this research was to create a cluster-regression model for predicting the groundwater salinity. The indicator of groundwater salinity in this study was electrical conductivity because it was simple to measure in field. Ninety-eight parameters were measured including precipitation, surface water levels, groundwater levels and electrical conductivity. In this study, the highest groundwater salinity at 3 wells was predicted using the combined cluster and multiple linear regression analysis. Cross correlation and cluster analysis were applied in order to reduce the number of parameters to effectively predict the quality. After the parameter selection, multiple linear regression was applied and the modeling results obtained were R2 of 0.888, 0.918, and 0.692, respectively. This linear regression model technique can be applied elsewhere in the similar situation.

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Parent support contribution and peer conformity on learning motivation

Jurnal EDUCATIO Jurnal Pendidikan Indonesia ◽

10.29210/120212964 ◽

2021 ◽

Vol 7 (1) ◽

pp. 53

Author(s):

Anggi Fadilah ◽

Marjohan Marjohan

Keyword(s):

Regression Analysis ◽

Linear Regression ◽

Parental Support ◽

Linear Regression Analysis ◽

Educational Process ◽

Learning Motivation ◽

Scale Model ◽

High Category ◽

Peer Conformity ◽

Very High

One that affects the success of student learning is motivation. Less motivation to learn in students will affect the decrease in enthusiasm for learning and learning outcomes. There are several factors that influence the motivation of students in learning, including the support of parents and peers. This research aims to; (1) Describe the contribution of parental support, peer conformity and students' learning motivation, and (2) examine the contribution of parental support and peer conformity together on students' learning motivation. This study uses a quantitative approach with analytical descriptive method. The sample in this study were students of class VII and VIII, a total of 108 students. This research instrument uses a Likert scale model. The data were analyzed by descriptive statistical techniques, then using simple linear regression analysis and multiple linear regression analysis. The research findings show that in general; 1) students' parental support is in the high category, peer conformity of students is in the very high category, students' learning motivation is in the very high category, and 2) there is a strong and positive relationship between parental support and students' learning motivation. . This research has implications for the educational process in schools as a contribution to parental support and positive peer conformity which makes students have high learning motivation and are confident in their own abilities.

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Electrical conductivity test in the evaluation of the physiological potential of treated and stored soybean seeds

Semina Ciências Agrárias ◽

10.5433/1679-0359.2021v42n6p3135 ◽

2021 ◽

Vol 42 (6) ◽

pp. 3135-3148

Author(s):

Ana Paula Silva Couto ◽

◽

Cristian Rafael Brzezinski ◽

Julia Abati ◽

Ronan Carlos Colombo ◽

...

Keyword(s):

Electrical Conductivity ◽

Seed Treatment ◽

Seed Quality ◽

Soybean Seed ◽

Accelerated Aging ◽

Control Treatment ◽

Soybean Seeds ◽

Seed Treatments ◽

Chemical Treatments ◽

Soybean Cultivars

Soybean seed treatment contributes to the maintenance of seed quality, but the effect of commercial formulations and chemical products on the effectiveness of the electrical conductivity test based on electrolyte leaching has been frequently questioned. This study aimed to verify the interference of the chemical seed treatment of two soybean cultivars on the effectiveness of the electrical conductivity test in evaluating the vigor of freshly treated and stored seeds. The experimental design was completely randomized, consisting of seven seed treatments and two evaluation periods (0 and 60 days after storage), with four replications. The used seed treatments consisted of 1) fipronil + pyraclostrobin + thiophanate-methyl, 2) imidacloprid + thiodicarb + carbendazim + thiram, 3) abamectin + thiamethoxan + fludioxonil + mefenoxam + thiabendazole, 4) carbendazim + thiram, 5) fludioxonil + mefenoxam + thiabendazole, 6) carboxin + thiram, and 7) control (no treatment). The cultivars were BRS 360 RR and BRS 284, which were analyzed separately. Germination, accelerated aging, emergence, and electrical conductivity tests were carried out. No differences were detected between the control and chemical treatments performed on seeds of the two freshly treated soybean cultivars regarding germination, accelerated aging, and emergence tests. The germination test stood out after storage with the cultivar BRS 360 RR, showing the maintenance of germination potential for seeds treated with carbendazim + thiram and the control treatment. Therefore, the chemical treatment of soybean seeds interferes with the result of the electrical conductivity test. The electrical conductivity test is effective in segregating seed lots in terms of vigor level. The electrical conductivity test correlates with the other vigor tests used to identify the reduction in the physiological seed quality with storage.

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Hubungan N-Total dan C-Organik Sedimen Dengan Makrozoobentos di Perairan Pulau Payung, Banyuasin, Sumatera Selatan

Jurnal Kelautan Tropis ◽

10.14710/jkt.v22i2.3770 ◽

2019 ◽

Vol 22 (2) ◽

pp. 147

Author(s):

Beta Susanto Barus ◽

Riris Aryawati ◽

Wike Ayu Eka Putri ◽

Ellis Nurjuliasti ◽

Gusti Diansyah ◽

...

Keyword(s):

Regression Analysis ◽

Sampling Method ◽

Positive Relationship ◽

Linear Regression Analysis ◽

Community Analysis ◽

Organic Content ◽

Mineralization Process ◽

Quality Of Water ◽

Very High

The quality of water was seen from the macrozoobenthos community analysis that lives in it. The purpose of this research is to know the relation N-total and C-organic in sediment with macrozoobenthos in Payung Island of Banyuasin Regency. This research uses purposive sampling method. Sampling and macrozoobenthic samples using Ekman grab. The types of macrozoobenthos found to consist of Bivalvia class (Nassarius distortus, Abra Soyae), Gastropoda (Septaria linatea, Epitonium pallasi), Polychaeta (Nereis sp) and Oligochaeta (Lumbriculus sp). The dominant macrozoobenthos composition is Nereis sp. The C-organic content in the waters sediments of Payung Island ranged from 10.52 to 17.92% (moderate to high criteria) and N-total ranged from 0.61 to 1.14% (high and very high criteria), C/N ratio ranged from 10 to 29. This indicates that sediment of Payung Island had undergone balance mineralization process and immobilization. The results of linear regression analysis show that C-organic and N-total have a positive relationship with the abundance of macrozoobenthos Kualitas suatu perairan dapat dilihat dari analisa komunitas makrozoobentos yang hidup di dalamnya. Tujuan penelitian ini adalah mengetahui hubungan antara kandungan N-total dan C-organik sedimen dengan makrozoobentos di Perairan Pulau Payung. Metodologi penelitian meliputi; pengambilan data parameter fisika kimia (suhu, salinitas, pH, dan DO). Pengambilan sampel sedimen dan makrozoobentos menggunakan ekman grab. Hasil dari penelitian ini, Jenis makrozoobentos yang ditemukan terdiri atas kelas Bivalvia (Nassarius distortus, Abra Soyae), Gastropoda (Septaria linatea, Epitonium pallasi), Polychaeta (Nereis sp) dan Oligochaeta (Lumbriculus sp). Komposisi makrozoobentos yang mendominasi yakni Nereis sp. Kandungan C-organik di sedimen perairan Pulau Payung berkisar 10,52-17,92% (kriteria sedang sampai tinggi) untuk N-total berkisar antara 0,61-1,14% (kategori tinggi dan sangat tinggi), sedangkan C/N rasio berkisar antara 10-29. Hal ini menunjukkan sedimen Pulau Payung telah mengalami proses mineralisasi dan imobilisasi seimbang. Hasil analisis regresi linear menunjukkan C-organik dan N-total memiliki hubungan yang positif dengan kelimpahan makrozoobenthos.

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TESTING ALGORITHMS AND PROGRAMS OF MULTIVARIATE STATISTICAL PROCEDURES—NECESSARY ASSUMPTION OF BUILDING EXPERT SYSTEMS

International Journal of Pattern Recognition and Artificial Intelligence ◽

10.1142/s0218001489000115 ◽

1989 ◽

Vol 03 (01) ◽

pp. 121-133 ◽

Cited By ~ 2

Author(s):

ENE-MARGIT TIIT

Keyword(s):

Regression Analysis ◽

Linear Regression ◽

Expert Systems ◽

Linear Regression Analysis ◽

New Method ◽

Simple Linear Regression ◽

Multivariate Statistical ◽

Statistical Procedures ◽

Testing Algorithms ◽

Very High

Sometimes programs, for multivariate statistical procedures are included into expert systems. The requirements of accuracy, exactness and reliability for such programs are very high. In this paper a new method for testing algorithms and programs of multivariate statistical procedures—the so-called “exact samples method” is introduced. The programs of simple linear regression analysis from four most popular standard packages are tested and compared with the help of the new method.

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Pre-packing cooling and types of packages in maintaining physiological quality of soybean seeds during storage

Journal of Seed Science ◽

10.1590/2317-1545v38n2158956 ◽

2016 ◽

Vol 38 (2) ◽

pp. 129-139 ◽

Cited By ~ 4

Author(s):

Everson Reis Carvalho ◽

João Almir Oliveira ◽

Denilson Paulo da Rosa Mavaieie ◽

Hellismar Wakson da Silva ◽

Cassiano Gabriel Moreira Lopes

Keyword(s):

Electrical Conductivity ◽

Experimental Design ◽

Seed Mass ◽

Accelerated Aging ◽

Soybean Seeds ◽

Randomized Experimental Design ◽

Deterioration Process ◽

Physiological Quality ◽

Polyethylene Container

Abstract: Seeds storing under appropriate conditions reduces the speed of the seeds deterioration process. The aim of this study was to evaluate pre-packing cooling and types of packages in the maintenance of the physiological quality of soybean seeds during storage. The completely randomized experimental design was used, with four replications, considering a factorial arrangement involving or not the pre-packing cooling of the seed mass, three types of packages (multi-layer paper bag, big bag, and polyethylene container), and five storing periods (0, 2, 4, 6 and 8 months). The physiological quality was evaluated by the tests of first germination count, germination, accelerated aging, electrical conductivity, emergence speed index and emergence. The use of packages with larger amount of seeds (big bag and polyethylene container) did not favor the maintenance of the pre-packing cooling temperature. The types of packages did not show significant differences in the seeds viability during storage, up to eight months, regardless the pre-packing cooling. The cultivars seeds showed different tolerance to storing, i.e. seeds of the cultivar TMG 1176 had lower storing potential comparing to the seeds from the cultivar SYN 9074.

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PENGARUH KOMPETENSI TERHADAP PRESTASI KERJA KARYAWAN BAGIAN MARKETING PADA KOPERASI SERBA USAHA (KSU) SINAR JAYA MALANG

Manajemen Bisnis ◽

10.22219/jmb.v4i1.5282 ◽

2018 ◽

Vol 4 (1) ◽

Author(s):

Muhammad Budi Arifin

Keyword(s):

Regression Analysis ◽

Job Performance ◽

Employee Performance ◽

Linear Regression Analysis ◽

Multiple Linear Regression Analysis ◽

Self Concept ◽

Average Score ◽

High Category ◽

Scale Range ◽

Very High

The purpose of this study was to determine the effect of competence on the part of employes job performance marketing division. This type of research is a quantitative study conducted on 32 employees of the marketing Koperasi Serba Usaha (KSU) Sinar Jaya Malang. Analysis tools used were a range of scales and multiple linear regression analysis. The results of research competence influence on employee performance, including the ability to know that the competence evidenced in the high category with an average score scale range is 100.67, competence knowledge in very high category with a score of 105, and competence in the category of self-concept is also very high with the average score scale range is 109.67. Employee performance in the high category, indicated by an average score of 93.33 scale range.Keywords: The Characteristics of Individuals, Competence and employee performance, Marketing.

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