scholarly journals Foliar fertilization in shaping the potato yield in the conditions of south-eastern Poland

2019 ◽  
Vol 74 (3) ◽  
pp. 133-152
Author(s):  
BARBARA HELENA SAWICKA ◽  
ALI HULAIL NOAEMA
Keyword(s):  
Field Experiment ◽  
Potato Yield ◽  
Mineral Fertilizers ◽  
Economic Traits ◽  
Foliar Fertilization ◽  
First Order ◽  
South Eastern ◽  
Standard Object ◽  
Order Factor ◽  
Commercial Yield

The study aimed at determining the effect of macro- and microelements contained in foliar fertilizers on potato productivity of tubers. The field experiment was conducted in 2015–2017 in Uhnin using the random blocks method. The first order factor were 2 cultivars of potatoes, the second order factor were 3 foliar fertilization technologies and standard object − without foliar spraying. Mineral fertilizers were constant. Foliar fertilizers were used in accordance with the recommendation of the producers. Foliar fertilizing has contributed to a significant increase in total and commercial yield. The cultivars determined the majority of potato's economic traits.

scholarly journals Effect of foliar fertilization using micronutrient fertilizers on the content of nitrates(V), nitrites(III) in potato tubers

2021 ◽  
Vol 76 (3) ◽  
pp. 33-47
Author(s):  
Bernadetta Bienia ◽  
Barbara Helena Sawicka ◽  
Barbara Krochmal-Marczak
Keyword(s):  
Field Experiment ◽  
Foliar Application ◽  
Growing Season ◽  
Potato Cultivars ◽  
Potato Tubers ◽  
Foliar Fertilization ◽  
First Order ◽  
South Eastern ◽  
Standard Object ◽  
Significant Shortage

The research was based on a 3-year field experiment carried out in south-eastern Poland, in 2013‒2015, on brown, slightly acidic soil. The experiment was established by the randomized subblock method, where the first-order factors were foliar fertilization: (A) Fortis Duotop Zn Mn + Fortis Aminotop, (B) Fortis B Mo + Ferti Agro, (C) Fortis Zn Mn + Fortis B Mo and (0) standard object, without foliar fertilization. The factors of the second order were 4 edible potato cultivars (‘Viviana’, ‘Vineta’, ‘Jelly’ and ‘Agnes’). Foliar application of all fertilizer combinations contributed to the reduction of the content of nitrates and nitrites in potato tubers. However, the response of cultivars to foliar fertilization was varied. The medium late cultivar ‘Jelly’ was characterized by the lowest tendency to accumulate nitrates, while the early cultivar ‘Vineta’ was the highest. The highest content of both nitrates and nitrites in tubers was recorded in the dry year, with a significant shortage of rainfall during the potato growing season, and the lowest in the year, about wet June, and September.

scholarly journals The effect of foliar fertilization on darkening of tuber flesh of selected potato cultivars

2020 ◽  
Vol 74 (4) ◽  
pp. 61-71
Author(s):  
BERNADETTA BIENIA ◽  
BARBARA SAWICKA ◽  
BARBARA KROCHMAL-MARCZAK
Keyword(s):  
Genetic Factor ◽  
Foliar Application ◽  
Apical Part ◽  
Potato Cultivars ◽  
Foliar Fertilization ◽  
First Order ◽  
Tuber Flesh ◽  
Standard Object ◽  
Varied Response ◽  
Order Factor

The aim of the study was to determine the effect of foliar fertilizers with the content of macro- and microelements used in the form of chelates on darkening of the tuber flesh of selected potato cultivars. The research was based on a 3-year (2013‒2015) field experiment carried out in Haczów (49°40'N, 21°54'E) on brown, slightly acidic soil. The experiment was based on the method of randomized sub-blocks, where the first order factor was foliar fertilization: Fortis Zn Mn + Fortis Aminotop (A), Fortis B Mo + Ferti Agro (B), Fortis Zn Mn + Fortis B Mo (C) and a standard object without foliar fertilization (0). Second-order factor included four edible potato cultivars of all earliness classes (‘Viviana’, ‘Vineta’, ‘Agnes’, ‘Jelly’). Significant differences in tuber darkening due to foliar application were observed only for tubers 24 h after cooking. The application of Fortis B Mo + Ferti Agro and Fortis Duotop Zn Mn + Fortis Aminotop fertilizers reduced the darkening of the apical part tuber to the greatest extent. Genetic factor differentiated the most the value of all examined traits. The cultivars tested showed varied response to foliar fertilizers.

scholarly journals Effect of fertilization on the growth rate of aboveground part of Jerusalem artichoke

2019 ◽  
Vol 74 (3) ◽  
pp. 67-79
Author(s):  
DOMINIKA SKIBA
Keyword(s):  
Podzolic Soil ◽  
Jerusalem Artichoke ◽  
Mineral Fertilization ◽  
Maximum Increase ◽  
First Order ◽  
Aboveground Part ◽  
Experimental Station ◽  
Standard Object ◽  
Order Factor ◽  
The University

The research was based on the field experiment conducted in 2013–2015 at the Experimental Station of the University of Life Sciences, in Parczew (51°38'24"N, 22°54'02"E), on podzolic soil. The experiment was established using the split-split-plot method in three replications. The factors of the first order were three cultivars: ‘Albik’, ‘Rubik’ and ‘Violet de Rennes’. The second order factor was mineral fertilization (N0P0K0 – as standard object and P43, K124, N100, P43K124, N50P43K124, N100P43K124, N150P43K124), calculated as the elemental form of fertilizers. As the basic fertilization, bovine manure was used in the amount of 30 t·ha–1. The aim of the research was to develop the basis for managing the fertilization of Jerusalem artichoke, which will allow to obtain the maximum increase of aboveground part of this species. It was found that for the rate of plant growth, the most optimal fertilization was manure and mineral fertilization in the amount of 100 kg of N·ha–1 in the nitrate-ammonium form. The phosphorus-potassium fertilization, despite the use of manure, significantly reduced the growth of plants in comparison with the standard object.

Challenging the Multidimensional Conception of Perceived Person-Environment Fit

2020 ◽  
pp. 1-9
Author(s):  
Julian M. Etzel ◽  
Gabriel Nagy
Keyword(s):  
Higher Education ◽  
University Students ◽  
Educational Outcomes ◽  
Factor Model ◽  
Higher Order ◽  
Substantial Proportion ◽  
Unique Variance ◽  
First Order ◽  
Person Environment Fit ◽  
Order Factor

Abstract. In the current study, we examined the viability of a multidimensional conception of perceived person-environment (P-E) fit in higher education. We introduce an optimized 12-item measure that distinguishes between four content dimensions of perceived P-E fit: interest-contents (I-C) fit, needs-supplies (N-S) fit, demands-abilities (D-A) fit, and values-culture (V-C) fit. The central aim of our study was to examine whether the relationships between different P-E fit dimensions and educational outcomes can be accounted for by a higher-order factor that captures the shared features of the four fit dimensions. Relying on a large sample of university students in Germany, we found that students distinguish between the proposed fit dimensions. The respective first-order factors shared a substantial proportion of variance and conformed to a higher-order factor model. Using a newly developed factor extension procedure, we found that the relationships between the first-order factors and most outcomes were not fully accounted for by the higher-order factor. Rather, with the exception of V-C fit, all specific P-E fit factors that represent the first-order factors’ unique variance showed reliable and theoretically plausible relationships with different outcomes. These findings support the viability of a multidimensional conceptualization of P-E fit and the validity of our adapted instrument.

scholarly journals Mathematical Creativity in Adults: Its Measurement and Its Relation to Intelligence, Mathematical Competence and General Creativity

2021 ◽  
Vol 9 (1) ◽  
pp. 10
Author(s):  
Michaela A. Meier ◽  
Julia A. Burgstaller ◽  
Mathias Benedek ◽  
Stephan E. Vogel ◽  
Roland H. Grabner
Keyword(s):  
Exploratory Study ◽  
Mathematical Creativity ◽  
Good Reliability ◽  
Mathematical Competence ◽  
First Order ◽  
The Past ◽  
Confirmatory Factor ◽  
Order Factor ◽  
General Creativity ◽  
Creativity Measure

Mathematical creativity is perceived as an increasingly important aspect of everyday life and, consequently, research has increased over the past decade. However, mathematical creativity has mainly been investigated in children and adolescents so far. Therefore, the first goal of the current study was to develop a mathematical creativity measure for adults (MathCrea) and to evaluate its reliability and construct validity in a sample of 100 adults. The second goal was to investigate how mathematical creativity is related to intelligence, mathematical competence, and general creativity. The MathCrea showed good reliability, and confirmatory factor analysis confirmed that the data fitted the assumed theoretical model, in which fluency, flexibility, and originality constitute first order factors and mathematical creativity a second order factor. Even though intelligence, mathematical competence, and general creativity were positively related to mathematical creativity, only numerical intelligence and general creativity predicted unique variance of mathematical creativity. Additional analyses separating quantitative and qualitative aspects of mathematical creativity revealed differential relationships to intelligence components and general creativity. This exploratory study provides first evidence that intelligence and general creativity are important predictors for mathematical creativity in adults, whereas mathematical competence seems to be not as important for mathematical creativity in adults as in children.

Underlying Common Factors of Adolescent Problem Behaviors

2002 ◽  
Vol 29 (2) ◽  
pp. 161-182 ◽  
Author(s):  
Lening Zhang ◽  
John W. Welte ◽  
William F. Wieczorek
Keyword(s):  
Problem Behaviors ◽  
Latent Variable ◽  
Factor Model ◽  
Common Factor ◽  
Measurement Model ◽  
First Order ◽  
Adolescent Problem Behaviors ◽  
The Common ◽  
Order Factor ◽  
Second Order Factor Analysis

The Buffalo Longitudinal Study of Young Men was used to address the possibility of a common factor underlying adolescent problem behaviors. First, a measurement model with a single first-order factor was compared to a model with three separate correlated first-order factors. The three-factor model was better supported, making it logical to conduct a second-order factor analysis, which confirmed the logic. Second, a substantive model was estimated in each of two waves with psychopathic state as the common factor predicting drinking, drug use, and delinquency. Psychopathic state was stable across waves. The theory that a single latent variable accounts for large covariance among adolescent problem behaviors was supported.

scholarly journals Effect of Lupine Straw on Potato Yield and Biological State of Soddy-Podzolic Soil

2020 ◽  
Vol 6 (9) ◽  
pp. 103-113
Author(s):  
I. Rusakova
Keyword(s):  
Podzolic Soil ◽  
Soddy Podzolic Soil ◽  
Crop Productivity ◽  
Potato Yield ◽  
General Level ◽  
Mineral Fertilizers ◽  
Plant Residues ◽  
Post Harvest ◽  
Leguminous Crops

Post-harvest plant residues, mainly straw of cereals and legumes, are the most important readily available biological resource for the reproduction of soil fertility. However, the data on their effectiveness and influence on the biological properties of the soil in the scientific literature are not unambiguous and contradictory. The results of long-term experiments on the study of the effectiveness of post-harvest residues of various crops are very few. The role of lupine as a green manure for increasing the productivity of potatoes is well studied, however, there are practically no data on the effect of lupine straw grown for grain on potato productivity. Studies in a long-term field experiment have established that the incorporation of lupine straw into the soil (against the background of the previous long-term introduction of straw of grain and leguminous crops of grain-tilled crop rotation), both in combination with mineral fertilizers and in pure form, contributed to an increase in the number of ecological-trophic groups of microorganisms, microbial biomass, nitrification activity of soddy-podzolic soil. The activation of microbial activity, increasing the supply of plants with available nutrients, promoted an increase in potato productivity, as well as an increase in the content of vitamin C and starchiness of tubers. A close correlation was noted between potato yield and determined microbiological parameters (r = 0.62–0.87), which indicates that the general level of biogenicity of soddy-podzolic soil, regulated by the introduction of straw of grain and leguminous crops, largely determines the level of its effective fertility and crop productivity.

scholarly journals Can We Compare Solidarity Across Europe? What, Why, When, and How to Assess Exact and Approximate Equivalence of First- and Second-Order Factor Models

2021 ◽  
Vol 3 ◽  
Author(s):  
Vera Lomazzi
Keyword(s):  
Factor Model ◽  
Second Order ◽  
Three Dimensions ◽  
Alignment Method ◽  
Cross Sectional ◽  
Political Values ◽  
First Order ◽  
Measurement Models ◽  
European Values ◽  
Order Factor

Although measurement invariance is widely considered a precondition for meaningful cross-sectional comparisons, substantive studies have often neglected evaluating this assumption, thereby risking drawing conclusions and making theoretical generalizations based on misleading results. This study offers a theoretical overview of the key issues concerning the measurement and the comparison of socio-political values and aims to answer the questions of what must be evaluated, why, when, and how to assess measurement equivalence. This paper discusses the implications of formative and reflective approaches to the measurement of socio-political values and introduces challenges in their comparison across different countries. From this perspective, exact and approximate approaches to equivalence are described as well as their empirical translation in statistical techniques, such as the multigroup confirmatory factor analysis (MGCFA) and the frequentist alignment method. To illustrate the application of these methods, the study investigates the construct of solidarity as measured by European Values Study (EVS) and using data collected in 34 countries in the last wave of the EVS (2017–2020). The concept is captured through a battery of nine items reflecting three dimensions of solidarity: social, local, and global. Two measurement models are hypothesized: a first-order factor model, in which the three independent dimensions of solidarity are correlated, and a second-order factor model, in which solidarity is conceived according to a hierarchical principle, and the construct of solidarity is reflected in the three sub-factors. In testing the equivalence of the first-order factor model, the results of the MGCFA indicated that metric invariance was achieved. The alignment method supported approximate equivalence only when the model was reduced to two factors, excluding global solidarity. The second-order factor model fit the data of only seven countries, in which this model could be used to study solidarity as a second-order concept. However, the comparison across countries resulted not appropriate at any level of invariance. Finally, the implications of these results for further substantive research are discussed.

scholarly journals Examining the Impostor-Profile—Is There a General Impostor Characteristic?

2021 ◽  
Vol 12 ◽  
Author(s):  
Fabio Ibrahim ◽  
Johann-Christoph Münscher ◽  
Philipp Yorck Herzberg
Keyword(s):  
Convergent Validity ◽  
Factor Model ◽  
Second Order ◽  
Model Fit ◽  
Impostor Phenomenon ◽  
General Factor ◽  
Order Model ◽  
First Order ◽  
Order Factor ◽  
Best Fit

The Impostor-Profile (IPP) is a six-dimensional questionnaire measuring the Impostor Phenomenon facets. This study aims to test (a) the appropriateness of a total score, (b) measurement invariance (MI) between gender, (c) the reliability of the IPP, and (d) the convergent validity of the IPP subscales. The sample consisted of N = 482 individuals (64% female). To identify whether the scales of the IPP form a total score, we compared four models: (1) six correlating subscales, (2) a general factor model, (3) a second-order model with one second-order factor and six first-order factors, and (4) a bifactorial model with six group factors. The bifactorial model obtained the best fit. This supports the assumption of a total impostor score. The inspection of structural validity between gender subgroups showed configural, metric, and partial scalar MI. Factor mean comparisons supported the assumption that females and males differ in latent means of the Impostor Phenomenon expressions. The omega coefficients showed sufficient reliability (≥0.71), except for the subscale Need for Sympathy. Overall, the findings of the bifactor model fit and construct validity support the assumption that the measurement through total expression is meaningful in addition to the theoretically formulated multidimensionality of the Impostor Phenomenon.

scholarly journals Time of introducing component crop influences productivity of intercropping system

2020 ◽  
Vol 55 (2) ◽  
pp. 10-25
Author(s):  
M. O. Iwuagwu ◽  
D. A. Okpara ◽  
C. O. Muoneke
Keyword(s):  
Experimental Design ◽  
Field Experiment ◽  
The Other ◽  
Growth And Yield ◽  
Pod Yield ◽  
South Eastern ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Cropping Seasons ◽  
Horticultural Research

Field experiment was conducted at National Horticultural Research Institute (NIHORT), Mbato Sub-station, Okigwe, Imo State, South-eastern Nigeria in the 2012 and 2013 cropping seasons to establish the most appropriate time to introduce component crops in cocoyam/cowpea mixture. Five different planting schemes (two and four weeks before, two and four weeks after and same day) and two cowpea genotypes (climbing Akidienu and erect IT97K-499-35) were used. The component crops were grown in monocultures to assess the productivity of the systems. The experimental design used was a completely randomized design with three replicates. Growth and yield of cocoyam and the cowpea genotypes increased significantly (P<0.05) when either of the component crops was planted earlier than the other. Intercropping reduced significantly (P<0.05) cocoyam yield by 0.7 − 74% in IT97K-499-35 and 22 − 80% in Akidienu. Sowing the cowpea genotypes the same day or before cocoyam resulted in over-yielding of cowpea, whereas sowing Akidienu and IT97K-499-35 after cocoyam caused pod yield reductions of 64% − 73% and 32% − 59% on average, respectively. Cocoyam planted two weeks before IT97K-499-35 produced more satisfactory yields of the intercrops than the other planting schedules with LER, LEC and ATER of 2.15, 1.03 and 1.57, respectively.

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