Effect of potassium and potting-bag size on foliar biomass and related attributes and oil composition of rose geranium (Pelargonium graveolens)

Published ArticleThis study was conducted to evaluate the effect of four concentrations of potassium (K; 1.3, 3.3, 5.3 and 7.3 mmol L−1) and two potting-bag sizes (5 and 10 L) on foliar biomass and related attributes and oil composition of rose geranium (Pelargonium graveolens). Plants were grown in a climate-controlled greenhouse at the University of the Free State and treatments were arranged in a split plot design. Potassium concentrations were allocated to the main plots and potting-bag size to the subplots replicated three times. Plant height, K tissue content, linalool, geraniol, geranyl formate and citronellol:geraniol ratio were affected by the K application. Plant height, number of branches, branch:height ratio, foliage fresh mass, K tissue content and oil yield were affected by the potting-bag size. Foliar fresh mass was significantly increased by the interaction between K concentration and potting-bag size. Growers may use a 5.3 mmol L−1 K concentration and a 5 L potting bag for optimum production of rose geranium under soil-less cultivation

South African Mine Effluents: Heavy Metal Pollution and Impact on the Ecosystem

Published ArticleSouth Africa embarks on extensive mining activities, which consequently produce enormous quantities of toxic HMs1 that pollute the surroundings; subjecting the ecosystem to dangers of infections and diseases. Prevalence of HMs in different environmental media and their impact depend on the physical and chemical states of the metal, which tends to persist in their localities because they cannot be biologically or chemically degraded as with organic substances. Mine fugitive dust clouds the environment; in most cases causing irrevocable damage to the biota, with harmful metals usually transferred from water bodies to the food chain via assimilation, bioaccumulation and biomethylation processes

Drug abuse amongst adolescent learners in townships

Abstract: The study explored the experiences of adolescent learners regarding drug abuse in previously disadvantaged townships in South Africa. A phenomenological research paradigm was employed, and an inductive research approach was implemented. The study followed a qualitative research design focusing on interviews and document analysis as data collection methods. Purposive sampling was done and one-on-one interviews with Life Orientation (LO) teachers in two Gauteng secondary schools were conducted as well as three Non-Governmental Organisations (NGO’s) and Non-Profit Organisations (NPO’s) from different organisations. Focus group interviews were conducted with adolescent learners in two Gauteng secondary schools. I further utilised an inductive content analysis using open coding and axial coding to decipher information gathered from interviews conducted with participants.The study leaned on two theoretical frameworks which include Bronfenbrenner’s Nested System and Erikson’s Eight Stages of Psychosocial Development. The findings indicated that adolescent learners get involved in the use of drugs due to their lack of identity formation and the need to belong. It was also discovered that adolescent learners did not master the adolescence stage successfully, hence getting involved in the use of drugs

Soybean Production, Constraints, and Future Prospects in Poorer Countries: A Review

This study was carried out to examine patterns of soybean production, constraints, and possible solutions in poorer countries such as Southern African countries. It was observed that the success of soybean in top-producing countries was characterized by large acreage of land, with a good supply of inputs coupled with intensive management and access to competitive markets. Africa is a minor player in the soybean industry as it supplies less than 1% of the world’s soybeans. Because the crop is not for direct household consumption, it is produced on a small-scale and treated as a zero inputs crop. This has resulted in a persistent yield gap, with levels reaching only a third of those obtained in developed countries. There is under-usage of inputs such as irrigation, fertilizers, and improved seed. There is need for a definite shift from small to large-scale production. Limited access to inputs, poor adoption of technologies and restricted markets usually also compromise production. The global demand for soybean due to a growing feed industry, biodiesel, industrial demand, and bias for plant-based protein, is going upwards. New soybean frontiers will likely be present in future, and countries whose production levels lag could take advantage of this situation

Genetic Diversity Analysis of Soybean (Glycine max (L.) Merr.) Genotypes Making Use of SSR Markers

Published ArticleIn this study, we aimed to investigate the genetic diversity and polymorphism among 30 soybean genotypes maintained by the ARC using simple sequence repeat (SSR) markers. Soybean genotypes were characterized using 20 SSR primers. DNA was extracted using the standard cetyl trimethylammonium bromide method and amplified using PCR. Allele size was determined via comparison with a 100 base pair (bp) DNA ladder. Molecular data were analyzed, and a dendrogram and matrix were generated using GGT 2.0 software. A total of 216 alleles with an average of 10.8 alleles per locus were detected. The allele sizes ranged between 2 and 33 bp with an average of 18.7 bp. The polymorphic information content among genotypes varied from 0.85 (Satt001) to 0.75 (Satt43) with an average of 0.716, and heterozygosity ranged from 0.87 to 0.78 with an average of 0.7485. The most diverse genotypes were B 66 S 31, 69S 7, and R5-4-2 M, which indicated the efficiency of the SSR markers for the detection of genetic diversity. The results of the current study revealed the diversity among the soybean genotypes tested, which might aid breeders in the future in the selection of parents for breeding

Customer experience, satisfaction and brand relevance : a South African grocery retail context perspective

Abstract: Retailers often compete in the market by focusing on achieving customer satisfaction by providing good in-store shopping experiences. South African shoppers are however argued to be very brand conscious, and therefore, the relevance of a retail brand may in addition influence this experience and satisfaction relationship. This study seeks to uncover the relationship between customer experience and customer satisfaction and explores the moderating role of brand relevance on the relationship between customer experience and satisfaction. Using a quantitative approach, a total of 395 responses were collected from South African grocery retail shoppers. An SEM analysis is conducted with the variables “Sense”, “Think” and “Feel” as the predictors of customer experience, and their resulting influence on customer satisfaction tested. The variable “Think” was the only experience variable that had a significant influence on customers’ satisfaction levels, whilst “Brand relevance” demonstrated potential as a predictor of customer satisfaction, rather than a moderator between experience and satisfaction

Financial Crisis and the South African Agricultural Sector: A Computable General Equilibrium (CGE) Analysis

Published ArticleThis study examines the impact of financial crisis as a shock on agricultural sector of the South African economy. Agriculture is regarded as a critical source of foreign exchange, employment and poverty alleviation in South Africa. Using a computable general equilibrium model of the South African economy based on the theory of ORANI-G framework, it was discovered that the impact of the financial crisis on agricultural sector was harmful to the economy. Job losses were recorded in the sector as well as decline in household demand. The financial crisis was also found to be harsh on domestic prices and general household consumption levels. The findings have far-reaching implications for research and practice. The results provide evidence of the vulnerability of the South African agricultural sector to any financial shocks