Advances in the South African Soil Classification System

2002 ◽  
pp. 201-220
Author(s):  
Michiel C. Laker
2020 ◽  
Author(s):  
CW van Huyssteen

The South African Taxonomic soil classification system (SAT) is well established and utilised in South Africa. However, it is not internationally well known and therefore the need arose to provide a tool by which South African soil taxonomists can convert South African soil classifications and profile descriptions to the international classifications of the World Reference Base (WRB) for soil resources. The diagnostics and tacit knowledge presented in this publication are therefore based on the SAT and the WRB. When necessary, further substantiation was derived from the Land Type Survey of South Africa. The adopted procedure is effective in providing a reasonable classification based on the South African soil forms and families, while excluding certain WRB soil groups and qualifiers, because these are irrelevant to South African taxonomy. Lastly, this publication also highlights some peculiarities, omissions and inconsistencies observed between the SAT and WRB.


Soil Science ◽  
1956 ◽  
Vol 81 (5) ◽  
pp. 399-414 ◽  
Author(s):  
C. R. VAN DER MERWE ◽  
H. HEYSTEK

First Monday ◽  
2006 ◽  
Author(s):  
Bob Jolliffe

When Amartya Sen visited South Africa in 2004 he made the observation that Nelson Mandela’s long walk to freedom began on African soil. He implicitly recognised that we have in South Africa a long tradition of interpreting, articulating and striving for an ideal of freedom, which reflects the aspiration of the broad masses of our people. The clearest articulation of this struggle was the Freedom Charter, adopted by the congress of the people in Kliptown in 1955. The free software movement (and related efforts in the fields of science and culture) draws upon a tradition of freedom rooted in an American libertarian tradition. In this short paper, I underline the importance of aligning efforts to promote free software and free culture with the rich existing tradition embodied in the South African Freedom Charter. Doing so may require a reinterpretation, re–imagining and even perhaps a re–vocabularising of the digital commons if it is to succeed as as a social, technical and political project in South Africa.


Soil Science ◽  
1955 ◽  
Vol 79 (2) ◽  
pp. 147-158 ◽  
Author(s):  
C. R. VAN DER MERWE ◽  
H. HEYSTEK

1970 ◽  
Vol 45 (3) ◽  
pp. 339-354
Author(s):  
H Vermeulen ◽  
HC Schonfeldt ◽  
B Pretorius

The South African consumer market is characterised by socio-economic and cultural diversity. Food expenditure patterns, behaviour and preferences differ significantly between the various socio-economic sub-groups. Packaging information, including red meat classification information, could be an important tangible resource used by consumers to gauge product quality. The first objective of the research reported in this paper is to investigate the red meat knowledge, usage and perceptions regarding beef and sheep meat classification and related quality parameters among South African consumers. Consumer perceptions of red meat classification were extracted from a comprehensive consumer survey among stratified representative samples of South African low-, middle- and high-income consumers (n = 165, n = 171 and n = 249). The paper also briefly reports on an in-store ‘observational’ research project that was conducted to develop an understanding of the communication of carcass classification to consumers through fresh red meat product labels at independent butchers and large retailers across South Africa (n = 60). Low-income consumers had very limited understanding and gave little attention to red meat classification. Even though middle-class and wealthy consumers also have a limited understanding of red meat classification, about half of these consumers check for a classification mark. Red meat classification was not mentioned by consumers as a major concern regarding red meat, but related aspects were important such as quality, fattiness, tenderness, juiciness, taste, freshness, smell and appearance. Purchase considerations for beef and mutton/lamb focussed largely on safety, appearance, price and eating quality. Labelling information observed at retail outlets gave very little attention to classification. There is a definite need for consumer education relating to the red meat classification system and for the development of an appropriate front-of-pack labelling system to communicate red meat classification.Keywords: Beef, high-income, knowledge, labelling information, lamb, low-income, middle-income, mutton, perceptions


PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0240955
Author(s):  
Letodi L. Mathulwe ◽  
Karin Jacobs ◽  
Antoinette P. Malan ◽  
Klaus Birkhofer ◽  
Matthew F. Addison ◽  
...  

Entomopathogenic fungi (EPF) are important soil-dwelling entomopathogens, which can be used as biological control agents against pest insects. EPF are capable of causing lethal epizootics in pest insect populations in agroecosystems. During a survey of the orchard soil at an organic farm, different EPF species were collected and identified to species level, using both morphological and molecular techniques. The EPF were trapped from soil samples taken from an apricot orchard. The traps, which were baited in the laboratory, used susceptible host insects, including the last-instar larvae of Galleria mellonella (wax moth larvae) and Tenebrio molitor (mealworm larvae). The potential pathogenicity of the local Metarhizium majus isolate was tested and verified using susceptible laboratory-reared last-instar T. molitor larvae. The identification of the M. majus isolated from South African soil was verified using both morphological and molecular techniques. The occurrence of M. majus in the South African soil environment had not previously been reported.


2020 ◽  
Author(s):  
Letodi L. Mathulwe ◽  
Karin Jacobs ◽  
Antoinette P. Malan ◽  
Klaus Birkhofer ◽  
Matthew F. Addison ◽  
...  

AbstractEntomopathogenic fungi (EPF) are important soil-dwelling entomopathogens, which can be used as biocontrol agents against pest insects. During a survey of the orchard soil at an organic farm, the EPF were identified to species level, using both morphological and molecular techniques. The EPF were trapped from soil samples, taken from an apricot orchard, which were baited in the laboratory, using susceptible host insects. The identification of Metarhizium majus from South African soil, using both morphological and molecular techniques, is verified. The occurrence of M. majus in the South African soil environment had not previously been reported.


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