scholarly journals Soil respiration depending on different agricultural practices before maize sowing

2017 ◽  
Vol 63 (No. 10) ◽  
pp. 435-441 ◽  
Author(s):  
Bojarszczuk Jolanta ◽  
KSIĘŻAK Jerzy ◽  
GAŁĄZKA Anna
Keyword(s):  
Soil Respiration ◽  
Zea Mays L ◽  
Agricultural Practices ◽  
Reduced Tillage ◽  
Acid And Alkaline Phosphatase ◽  
Maize Cultivation ◽  
Simple Regression Analysis ◽  
Direct Sowing ◽  
Simple Regression ◽  
Soil Dehydrogenase Activity

The aim of the study was to compare soil respiration depending on different agricultural practices before sowing of maize (Zea mays L.). Results of the study were derived from the field experiment that was carried out in 2013–2015; the research indicates that soil respiration depends on cultivation method. The highest soil respiration was recorded in maize cultivation in monoculture using full tillage. The simplifications in maize cultivation caused a decrease of soil respiration, especially in direct sowing. The lowest level of this parameter was recorded in monoculture in direct sowing. Compared with other treatments, such as direct sowing, reduced tillage and crop rotation, soil respiration was higher by 65, 55 and 12%, respectively. The statistically significant differences in soil respiration in the tested agricultural practices were observed in the first date of measurement in all years of the study. The higher soil respiration values were noted in autumn. The yield of maize correlated with soil respiration, but stronger relationship was noted between soil respiration and grain yield of maize than straw yield. The simple regression analysis showed no linear relationship between soil respiration and evaporation, changes in soil moisture and biochemical parameters such as soil dehydrogenase activity, acid and alkaline phosphatase.

scholarly journals Evaluation of Sustainability of Maize Cultivation in Poland. A Prospect Theory—PROMETHEE Approach

2018 ◽  
Vol 10 (11) ◽  
pp. 4263 ◽  
Author(s):  
Aleksandra Król ◽  
Jerzy Księżak ◽  
Elżbieta Kubińska ◽  
Stelios Rozakis
Keyword(s):  
Prospect Theory ◽  
Reduced Tillage ◽  
Small Farm ◽  
Tillage Practices ◽  
Maize Cultivation ◽  
Long Term Experiment ◽  
Promethee Method ◽  
Large Farm ◽  
Alternative Practices ◽  
Direct Sowing

This study aims at exploiting research outcomes concerning tillage practices in order to make solutions available to farmers to mitigate negative environmental impact to soils. Two alternative practices have been analysed against conventional full tillage based on data provided by a long-term experiment conducted at the Institute of Soil Science and Plant Cultivation (IUNG) farm in Grabów, Central Poland. Reduced Tillage and Direct Sowing are evaluated against Full Tillage on the basis of socio-economic and environmental criteria. Multi-criteria decision analysis undertaken using the PROMETHEE method provided evidence that the ‘optimal’ maize cultivation system depends on the decision maker’s viewpoint and preferences. In fact, criteria selected and related weights elicited from representative farmers, as well as from an expert agronomist, reveal different viewpoints. Direct sowing was the most preferable for the large farm and expert perspective, whereas in case of small farm reduced tillage ranked first. Prospect theory developed by behavioural economists was incorporated to take into account decision biases. As a matter of fact, based on Prospect Theory-PROMETHEE from the small farm and the expert perspective, the conventional system was now ranked first, while for the large farm, the most preferable practice was still direct sowing.

The Impact of Business Mentoring on Micro, Small, Medium Enterprises Performance

2017 ◽  
Vol 1 (1) ◽  
pp. 31-37
Author(s):  
Mohammad Adrian ◽  
Hendrati Dwi Mulyaningsih ◽  
Santi Rahmawati
Keyword(s):  
Quantitative Research ◽  
Causal Analysis ◽  
Coefficient Of Determination ◽  
Mentoring Program ◽  
Simple Regression Analysis ◽  
Small Medium Enterprises ◽  
Medium Enterprises ◽  
The Impact ◽  
Necessity Entrepreneur ◽  
Simple Regression

This reasearch is conducted on MMSME (Micro Small Medium Enterprises) that are participated in the MMSME Syari’ah Mentoring Program by Academicians and Practitioners (PUSPA) organized by Bank Indonesia in Bandung. MMSME who participated in PUSPA program 2016 is MMSME that included in necessity entrepreneur where MMSME operated just to fullfil the life necessities. The purpose of this reasearch was to investigate the influence of the business mentoring on the MMSME performance in PUSPA program 2016. Researcher used quantitative research method. Data were analyzed using simple regression analysis and descriptive-causal analysis. The result showed that business mentoring affect the performance of MMSME that participated in PUSPA Program 2016. Based on the calculation, coefficient of determination (R2) can be seen the influence of business mentoring variable (X) on the performance (Y) is 74%. While the remaining 26% is influenced by other factors such as entrepreneurship competence and human resources.

THE IMPACT OF BUSINESS MENTORING ON MICRO, SMALL, MEDIUM ENTERPRISES PERFORMANCE

2018 ◽  
Vol 1 (1) ◽  
pp. 7
Author(s):  
Mohammad Adrian ◽  
Santi Rahmawati
Keyword(s):  
Research Method ◽  
Quantitative Research ◽  
Coefficient Of Determination ◽  
Mentoring Program ◽  
Simple Regression Analysis ◽  
Small Medium Enterprises ◽  
Medium Enterprises ◽  
The Impact ◽  
Necessity Entrepreneur ◽  
Simple Regression

This reasearch is conducted on MSME (Micro Small Medium Enterprises) that are participated in the MSME Syari’ah Mentoring Program by Academition and Practitioners (PUSPA) organized by Bank Indonesia in Bandung. MSME who participated in PUSPA program 2016 is MSME that included in necessity entrepreneur where MSME operated just to fullfil the life necessities.The purpose of this reasearch was to investigate the influence of the business mentoring on the MSME performance in PUSPA program 2016.Researcher used quantitative research method. Data were analyzed using simple regression analysis and descriptive-causal analysis.The result showed that business mentoring affect the performance of MSME that participated in PUSPA Program 2016. Based on the calculation, coefficient of determination (R2) can be seen the influence of business mentoring variable (X) on the performance (Y) is 74%. While the remaining 26% is influenced by other factors such as entrepreneurship competence and human resources.  

scholarly journals Effect of ecological and conventional managements on soil enzymatic activities in coffee agroecosystems

2018 ◽  
Vol 48 (4) ◽  
pp. 420-428
Author(s):  
Johana Juliet Caballero Vanegas ◽  
Karen Bibiana Mejía Zambrano ◽  
Lizeth Manuela Avellaneda-Torres
Keyword(s):  
Sustainable Management ◽  
Climatic Variability ◽  
Agricultural Practices ◽  
Enzymatic Activities ◽  
Acid And Alkaline Phosphatase ◽  
Dry Seasons ◽  
Synthetic Fertilizers ◽  
Coffee Agroecosystems ◽  
Alkaline And Acid Phosphatase

ABSTRACT Understanding the impacts of agricultural practices on soil quality indicators, such as enzymatic activities, is of great importance, in order to advance in their diagnosis and sustainable management. This study aimed to evaluate the effect of ecological and conventional agricultural managements on enzymatic activities of a soil under coffee agroecosystems. The enzymatic activities were associated with the biogeochemical cycles of nitrogen (urease and protease), phosphorus (acid and alkaline phosphatase) and carbon (β-glucosidase), during the rainy and dry seasons. Physical-chemical soil proprieties were also assessed and related to resilience scores linked to the climatic variability reported for the areas under study. The activities of urease, alkaline and acid phosphatase and ß-glucosidase were statistically higher in ecological agroecosystems than in conventional ones. This may be attributed to the greater application of organic waste in the ecological environment, as well as to the absence of pesticides and synthetic fertilizers, which allow better conditions for the microbial activity. The resilience scores to the climate variability that showed the highest correlations with the assessed enzymatic activities were: the farmers' knowledge on soil microorganisms, non-use of pesticides and synthetic fertilizers and non-dependence on external supplies. It was concluded that the enzymatic activities are modified by the management systems, being specifically favored by the ecological management. This agroecosystem, in the long term, ensures an efficient use of the soil resources, with a lower degradation and contamination.

scholarly journals Effects of NP Fertilizer Placement Depth by Year Interaction on the Number of Maize (Zea mays L.) Plants after Emergence Using the Additive Main Effects and Multiplicative Interaction Model

Agronomy ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1543
Author(s):  
Piotr Szulc ◽  
Jan Bocianowski ◽  
Kamila Nowosad ◽  
Henryk Bujak ◽  
Waldemar Zielewicz ◽  
...  
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Interaction Model ◽  
Fertilizer Application ◽  
Fertilizer Placement ◽  
Multiplicative Interaction ◽  
Maize Cultivation ◽  
Main Effects ◽  
Placement Depth ◽  
Np Fertilizer

Field experiments were carried out at the Department of Agronomy of the Poznań University of Life Sciences to determine the effect of the depth of NP fertilization placement in maize cultivation on the number of plants after emergence. The adopted assumptions were verified based on a six-year field experiment involving four depths of NP fertilizer application (A1—0 cm (broadcast), A2—5 cm (in rows), A3—10 cm (in rows), A4—15 cm (in rows)). The objective of this study was to assess NP fertilizer placement depth, in conjunction with the year, on the number of maize (Zea mays L.) plants after emergence using the additive main effects and multiplicative interaction model. The number of plants after emergence decreased with the depth of NP fertilization in the soil profile, confirming the high dependence of maize on phosphorus and nitrogen availability, as well as greater subsoil loosening during placement. The number of plants after emergence for the experimental NP fertilizer placement depths varied from 7.237 to 8.201 plant m−2 during six years, with an average of 7.687 plant m−2. The 61.51% of variation in the total number of plants after emergence was explained by years differences, 23.21% by differences between NP fertilizer placement depths and 4.68% by NP fertilizer placement depths by years interaction. NP fertilizer placement depth 10 cm (A3) was the most stable (ASV = 1.361) in terms of the number of plants after emergence among the studied NP fertilizer placement depths. Assuming that the maize kernels are placed in the soil at a depth of approx. 5 cm, the fertilizer during starter fertilization should be placed 5 cm to the side and below the kernel. Deeper NP fertilizer application in maize cultivation is not recommended. The condition for the use of agriculture progress, represented by localized fertilization, is the simultaneous recognition of the aspects of yielding physiology of new maize varieties and the assessment of their reaction to deeper seed placement during sowing.

PENGARUH PENGETAHUAN PERPAJAKAN TERHADAP KEPATUHAN WAJIB PAJAK KENDARAAN BERMOTOR DI KANTOR SAMSAT KOTA TOMOHON

2021 ◽  
pp. 292-301
Author(s):  
Stevly Tumanduk ◽  
Arie Kawulur ◽  
Aprili Bacilius
Keyword(s):  
Motor Vehicle ◽  
Regression Coefficient ◽  
Primary Data ◽  
Survey Method ◽  
Observation Data ◽  
Simple Regression Analysis ◽  
Variable Influence ◽  
The Impact ◽  
Linearity Test ◽  
Simple Regression

Abstrak Riset ini bermaksud demi mengetahui apakah pengaruh pengetahuan perpajakan terhadap kepatuhan wajib pajak di Kantor SAMSAT Kota Tomohon. Pada riset ini variabel kepatuhan wajib pajak menjadi variabel dependen. Sampel pada pengkajian ini sebanyak 100 wajib pajak serta diambil memakai rumus Slovin.             Metode yang dipergunakan dalam riset ini ialah metode survei dengan pendekatan kuantitatif. Pada riset ini data primer dikumpulkan dengan cara teknik pengumpulan data observasi, dokumentasi serta angket/kuesioner, adapun teknik analisis data yang digunakan pada pengkajian ini ialah analisis regresi sederhana dengan uji normalitas, uji linieritas, dan uji hipotesis.             Hasil pengkajian ini adanya dampak positif dan signifikan mengenai dampak pengetahuan perpajakan terhadap kepatuhan wajib pajak kendaraan bermotor di mana persamaan regresi sederhana dalam riset ini menunjukkan nilai koefisien Regresi X sebesar 0.072 memperlihatkan ternyata setiap penambahan 1% pengaruh pengetahuan perpajakan, maka nilai kepatuhan wajib pajak kendaraan bermotor bertambah sebesar 0.072. Koefisien regresi tersebut bernilai positif, sehingga dapat dikatakan bahwa dampak variabel X terhadap Y ialah positif. Dengan demikian variabel pengaruh pengetahuan perpajakan berdampak signifikan atas kepatuhan wajib pajak kendaraan bermotor di Kantor Samsat Kota Tomohon.   Kata Kunci : Pengetahuan Perpajakan, Kepatuhan Wajib Pajak   Abstract                This research intends to find out whether the influence of tax knowledge on taxpayer compliance at the Tomohon City SAMSAT Office. In this research, the taxpayer compliance variable becomes the dependent variable. The sample in this study was 100 taxpayers and was taken using the Slovin formula. The method used in this research is a survey method with a quantitative approach. In this research, primary data were collected by means of observation data collection techniques, documentation and questionnaires, while the data analysis techniques used in this study were simple regression analysis with normality test, linearity test, and hypothesis testing. The results of the study are that there is a positive and significant impact on the impact of tax knowledge on motor vehicle taxpayer compliance where the simple regression equation in this research shows the X regression coefficient value of 0.072 showing that all 1% additions affect tax knowledge, then the motor vehicle taxpayer compliance value increases by 0.072. The regression coefficient is positive, so it can be said that the impact of variable X on Y is positive. Thus the variable influence of tax knowledge has a significant impact on motor vehicle taxpayer compliance at the Tomohon City Samsat Office.   Keywords: Tax Knowledge, Taxpayer Compliance

GAYA KEPEMIMPINAN DAN TINGKAT STRES KERJA KARYAWAN PERUSAHAAN TELEKOMUNIKASI INDONESIA

2018 ◽  
Vol 12 (2) ◽  
pp. 137
Author(s):  
Elvira Azis ◽  
Arif Partono Prasetio ◽  
Lugina Suciati Putri ◽  
Annisa Yasya Zhafira
Keyword(s):  
Regression Analysis ◽  
Leadership Style ◽  
Work Stress ◽  
Stress Level ◽  
Coefficient Of Determination ◽  
Management Service ◽  
Transportation Management ◽  
Dependent Variables ◽  
Simple Regression Analysis ◽  
Simple Regression

ABSTRACTThe study investigates the effect of leadership style on employee’s work stress in ESS Transportation Management Service Telkom. The data were collected from 92 employees and obtained using a questionnaire consisted of 29 items with 6 point Likert scale. Desciptive analysis used to illustratedthe leadership style and work stress level inside the organization. Simple regression analysis was used to analyze the data and to measure the relation between independent and dependent variables. Employee perceives that the leadership style implemented in the organization was already appropriate and in line with their expectation regarding how their leader should engage the work relation. Meanwihle, the work stress level among employees were low. The regression analysis revealed the negative relation between leadership style and work stress level. When employeesperceived that their leader was act accordance to what their expectaion then the stress level will lessen. The coefficient of determination was 0.321. This mean the leadership style can only explain 32.1% of work stress, then the organization need to identify other factors which also affect the work stress. The comparison with the previous literatures also discussed.ABSTRAKPenelitian ini bertujuan menganalisis pengaruh gaya kepemimpinan terhadap tingkat stres kerja karyawan di Divisi ESS Transportation Management Service Telkom. Data penelitian diperoleh daripenyebaran kuesioner terhadap 92 orang responden. Kuesioner yang digunakan memiliki 29 pertanyaan dengan skala Likert 6 poin. Teknik analisis deskriptif digunakan untuk menjelaskan tingkat gaya kepemimpinan dan tingkat stres yang dipersepsikan oleh karyawan. Sedangkan untuk menganalisis pengaruh antara dua ariabel tersebut digunakan analisis regresi sederhana. Hasil penelitian mengungkapkan bahwa karyawan merasa gaya kepemimpinan yang diterapkan sudahsesuai dengan apa yang mereka harapkan. Mereka menilai bahwa pemimpin sudah menerapkan gaya yang tepat dalam setiap kondisi yang terkait pekerjaan. Tingkat stres karyawan di perusahaan ini relatif rendah. Selanjutnya, analisis regresi memperlihatkan hubungan signifikan negatif antara gaya kepemimpinan dan tingkat stres. Karyawan yang merasa sesuai dengan gaya kepemimpinan atasan akan memiliki tingkat stres yang lebih rendah. Koefisien determinasi dari hasil penelitian ini adalah 0.321. ini berarti bahwa gaya kepemimpinan hanya dapat menjelaskan tingkat stres sebesar 32.1% of work stress. Hasil ini menjadi masukan bagi perusahaan untuk mempelajari faktor-faktor lain penyebab stres. Pembahasan di dalam penelitian ini akan menyajikan pula hasil riset terdahulu dari berbagai latar belakang budaya

Continuous application of direct sowing: Traffic effect on subsoil compaction and maize (Zea mays L.) yields in Argentinean Pampas

2013 ◽  
Vol 134 ◽  
pp. 111-120 ◽  
Author(s):  
G.F. Botta ◽  
A. Tolón-Becerra ◽  
X. Lastra-Bravo ◽  
M. Tourn ◽  
R. Balbuena ◽  
...  
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Continuous Application ◽  
Direct Sowing ◽  
Subsoil Compaction

scholarly journals Longitudinal case study of child-directed speech in Slovak from the perspective of acquisition of personal pronouns

2021 ◽  
Vol 65 (3) ◽  
pp. 255-268
Author(s):  
Milada Walková ◽  
◽  
Alexandra Brestovičová ◽  
Keyword(s):  
Regression Analysis ◽  
Longitudinal Study ◽  
Proper Names ◽  
Longitudinal Case Study ◽  
Personal Pronouns ◽  
Second Person ◽  
Simple Regression Analysis ◽  
Simple Regression ◽  
Over Time

Objectives. Previous research has shown that the acquisition of personal pronouns benefits from input with higher amounts of stable reference. This paper aims to provide more evidence of how input is structured. The language under study is Slovak, a pro-drop language, allowing to extend the study of input to verb marking. Participants and setting. The longitudinal study follows speech directed to three children in two families from the age 1;9 to 3;0. Hypotheses. It was hypothesised that the incidence of the first and second person singular pronouns and verb marking as expressions with shifting reference grows with the child’s age while the incidence of proper names and category names as expressions with stable reference decreases with the child’s age. Statistical analysis. Occurrences of first and second person singular pronouns and verb marking as expressions with shifting reference as well as proper names and category names referring to the speaker and addressee as expressions with stable reference were found and analysed. Simple regression analysis testing was conducted on the data. Results. The results confirm the hypothesis, showing an increase in the first and second person singular pronouns and verb marking over time, at the expense of proper names and category names referring to the speaker and the addressee. Study limitations. The study is limited by the size of the sample.

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