AEJSA Volume 15, Number 1: January-April, 2021


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Assessment of Salt Affected Soil and Irrigation Water Quality in Amibara and Dubti irrigated
Areas, Afar Regional states of Ethiopia

Ashenafi Worku Daba, Bethel Nekir Nisaren, Asad Sarwar Qureshi, Lamme Mamo Haile 1 and Teshome Bekele Banje

ABSTRACT: In irrigated arid and semi-arid areas of Ethiopia, particularly in the Afar region, salinity is a serious problem, but clear information about its status and distribution is lacking. The study aimed to investigate salt-affected soils and irrigation water quality at Amibara and Dubti irrigated areas. About 890 soil samples were collected at a depth of 0-30 and 30-60 cm using systematic sampling technique, and water samples were collected from surface and sub-surface for irrigated areas. Standard methods were followed to measure soil and water properties. Arc GIS 9.3 was used to map the overall salinity and sodicity problem for both regions. Results showed that around 62.31 % of the Amibara irrigated area and 18.26 % Dubti irrigated area had been mapped as saline soil (EC > 4 dS/m and SAR < 13). On the other hand, only 10.23 % at Amibara irrigated area and 4.15 % Dubti irrigated area were classed as saline-sodic (ECe > 4 dS/m, and SAR >13). Furthermore, the irrigation water quality of different water sources indicated groundwater and field drain water has poor irrigation water qualities compared to diversion from the river, central canal, and field canal water sources. It is possible to infer that if the present irrigation practice, including irrigation water quality, is continuing, it is expected that most of the cultivated lands will become sterile within a short period. The water table control by rehabilitating the subsurface drainage system seems to be the only feasible way to improve the sustainability of both irrigated areas. Thus, it needs to be monitored regularly to secure up-to-date knowledge of its extent to improve management practices and take appropriate actions

[ FULL TEXT PDF 1-14 ] DOI: 10.22587/aejsa.2021.15.1.1

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Genetic Parameter and Analysis of Traits Interrelationship in F2 Rice Generation of Inpago Unsoed 1 X Basmati Delta 9

Agus Riyanto, Totok Agung Dwi Haryanto, Ponendi Hidayat, Suprayogi

ABSTRACT: The rice improvement program in Indonesia is addressed to develop high-yielding varieties with long slender rice grain. The purpose of this study, therefore, was to estimate the genetic parameters, i.e., gene action, number of genes control, the magnitude of genetic variability, heritability, genetic advance and interrelationship of traits of yield components and yield were studied in the F2 generation of Inpago Unsoed 1 x Basmati Delta 9. The experiment was carried out at the experimental farm of Agriculture Faculty, Jenderal Soedirman University, Purwokerto, Central Java, Indonesia, from October 2018 - February 2019. The genetic material used was seeds of F2 populations derived from the crossing between Inpago Unsoed 1 and Basmati Delta 9, and the two parental genotypes. The estimates of Skewness, Kurtosis, genetic variability, heritability, genetic advance, and interrelationship were computed for yield and yield component traits. Broad genetic variability, high/medium heritability, and high genetic advance were found in the number of productive tillers, grains per, and grain yield per plant. The number of productive tillers and grains per panicle had a high correlation coefficient and positively direct effects on the grain yield per plant. It could be concluded that the number of productive tillers and the number of grains per panicle might be considered as criteria of selection for the development of high yield and long slender rice grain through pure line selection.

[ FULL TEXT PDF 15-28 ] DOI: 10.22587/aejsa.2021.15.1.2

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The Competitive Impact of CSR on SMEs: An Empirical Research in Vietnam

Phan Van-Thanh, Podruzsik Szilárd

ABSTRACT: RESEARCH OBJECTIVES: This study's primary goal is to investigate how the competitiveness impact of corporate social responsibility (CSR) on small and medium-sized enterprises (SMEs) in Vietnam is based on a new theoretical model developed by the authors. THEORETICAL FRAMEWORK: This study contributes to the literature by providing a new theoretical model to investigate the impact of CSR on SMEs' competitiveness based on the various theoretical CSR and competitiveness factors. This research also the first empirical study focusing on this relationship in Vietnamese SMEs. METHODOLOGICAL DESIGN/APPROACH: The data was collected by an online and offline questionnaire survey of 216 managers and non-manager working in the Vietnamese SMEs. Structural equation modeling (SEM) was applied to examine and test the hypothesis of the proposed research model. MAIN FINDINGS: The study's outcomes confirmed the significant positive relationship between CSR and competitiveness levels of SMEs. We also found that the highest correlation was the employee factor, for which the interaction with the competitiveness variables was significant than the other CSR factors. On the contrary, the environment factor has the lowest correlation between the interaction with the competitiveness variables. RESEARCH LIMITATIONS: The findings of this study were limited to the interviewed Vietnamese SMEs context so that we couldn't generalize our results to other countries and other businesses framework; as a consequence, more research will be needed in this area. PRACTICAL IMPLICATIONS: This research provides Vietnamese managers an alternative tool for learning how to embrace and evaluate the CSR: a CSR and competitiveness scale and helps them understand how CSR contributes to the creation or enhancement of Vietnamese SMEs' competitiveness levels of Vietnamese SMEs.

[ FULL TEXT PDF 29-44 ] DOI: 10.22587/aejsa.2021.15.1.3

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