Thesis (MScAgric.)--Stellenbosch University, 2001. / ENGLISH ABSTRACT: After sixty years of state control, the agricultural sector in South Africa has been transformed to the so-called free dispensation, with the driving forces being market access and rules of the WTO. On the one hand, this increased the exposure of the sector, particularly at international level where interest for South African produce developed. On the other hand, transformation induced a considerable degree of price squeeze and risk in the production of certain commodities including wheat. Notwithstanding, local wheat producers like any other farmers are generally price takers, and in some cases do not have a comparative advantage in what they produce. This is worsened by policy distortions in product markets, although to a lesser extent than before. These distortions are responsible for farmers to make decisions that are neither economically efficient nor optimal in a social sense. Therefore, the uncertain future of the wheat industry, particularly in the Western Cape, including the changing business environment, urges producers to adapt quickly if they wish to stay in business. Hence, the challenge for a farmer and agricultural support organisations is to find solutions to these problems. One of the factors that can be looked into in finding solutions is to look at the demand side of the equation by taking product differentiation and market identification into account. In other words, products that carries a specific character, and a niche market where these products attain higher prices are the main objectives of this exercise. In looking at these options, it is necessary to first study the end consumer of these products. Looking at the local market first, there is a relatively small but growing market for high priced niche products, but for the most part, local consumers are looking for low cost commoditytype products. In many cases, South Africa is marginally competitive in these products and so must look at alternative markets. On the export market, on the other hand, consumers are generally more sophisticated and specific in the kind of food they demand, where they are looking for quality and tracebility, and are willing to pay a premium which can be exploited. Therefore, the aim of this study is to determine whether wheat would have a comparative advantage if produced under organic management, as a system that have products with these attributes. The study first evaluates the comparative advantage of the existing industry, the so-called conventional wheat, specifically looking at the policy environment around this commodity, as these are likely to affect the potential of organic wheat. The Policy Analysis Matrix technique is used to calculate various indicators of comparative advantage and to identify the effects of policy measures with regard to wheat. The analysis used the available data for ten selected farming areas. On the other hand, organic wheat farming is not practised in the Western Cape at present. As a result, expert assessment was used to provide information based on the reference method. As the study is the comparison of two systems, the results therefore indicates that some areas of the Western Cape do not have a comparative advantage in wheat production under conventional practices, which would not be the case if produced under organic management. The reasoning underlying this is complex, but mainly traced from high levels of input use that carries a distorting effect, partly because of tariffs on imported inputs, unlike organic production which is less subject to this effect. The net effect of the whole policy environment has a negative impact on producers including those of potential organic wheat, as some policies are likely to affect this potential industry. Consequently, it is recommended that farmers must evaluate their options by looking at systems that utilise less distorted inputs, and hence higher profits like organic farming. / AFRIKAANSE OPSOMMING: Na sestig jaar van staats-geheer is die landbsektor van Suid-Afrika omvorm na In sogenaamde vrye bedeling met marktoegang en die reels van die WHO as drywers. Hierdie omvorming het enersyds die blootstelling van die landbou sektor verhoog, veral in die buiteland waar belangstelling in Suid-Afrikaanse produkte toegeneem het. Aan die ander kant het die transformasie die realiteite van die prys-koste knyptang en produksierisiko, ook in die geval van koring, na yore gebring. Plaaslike koringprodusente, soos aIle ander boere, is in die algemeen prysnemers en in sommige gevalle het hulle weinig mededingende voordele in wat hulle produseer. Dit word vererger deur beleidsversteurings in produkmarkte al is die versteurings minder as in die verlede. Die versteurings gee egter steeds daartoe aanleiding dat boere soms besluite neem wat nie ekonomies of sosiaal optimaal is nie. Dit volg dus dat die onsekere toekoms van die koringbedryf, veral in die Wes-Kaap, asook die vinnig veranderende besigheidsomgewing produsente noop om vinnig by die veranderende omstandighede aan te pas indien hulle in besigheid wil bly. Die uitdaging is dus vir boere en hul ondersteuningmeganismes om oplossings vir voorgenoemde probleme te vind. Een moontlike oplossing kan gevind word deur die potensiaal van produkdifferensiasie en mark identifikasie aan die vraagkant van die vergelyking te ondersoek. Met ander woorde, die identifikasie van nis-produkte met In spesifieke karakter wat hoer pryse behaal. Ten einde sodanige produkte te identifiseer is dit nodig om die verbruiker daarvan te analiseer. In die plaaslike mark is daar In relatiewe klein maar vinnig groeiende mark vir hoewaarde nis-produkte. Dit moet egter toegegee word dat die grootste gedeelte van plaaslike verbruikers meer ge'interesseerd is in goedkoop kommoditepe produkte. In die meeste gevalle is Suid-Afrika marginaal kompeterend in hierdie produkte en moet altematiewe markte dus ondersoek word. Hierteenoor is verbruikers in sekere gedeeltes van die uitvoermark meer gesofistikeerd en spesifiek in die aard van die produkte wat verlang word. Die fokus is veral op kwaliteit en naspoorbaarheid en sodanige verbruikers is gewoonlik bereid om In premie te betaal vir produkte wat hierdie behoeftes bevredig. Die doel van hierdie studie is dus om te bepaal of organiesgeproduseerde koring In mededingende voordeel sou he indien dit aan die eienskappe van kwaliteit en naspoorbaarheid sou voldoen. In hierdie studie word die relatiewe mededingendheid van die bestaande stelsel, sogenaamde konvensionele koringproduksie, geevalueer met spesifieke verwysing na die beleidsomgewing waarbinne produksie plaasvind. Hierdie beleidsomgewing sal natuurlik ook In invloed uitoefen op die organiese produksie van koring',f 'n BeleidS}nalise ¥atriks word gebruik om verskillende indikatore van mededingende voordeel te bereken en om sodoende die invloed van die beleidsmaatreels op die koringbedryf te analiseer. Vir konvensionele produksie is bestaande data uit tien verskillende boerderygebiede gebruik. Alhoewel geen voorbeelde gevind kon word van bestaande gesertifiseerde organiese koringproduksie in die Wes-Kaap nie, is die ekspert-groep tegniek met behulp van die verwysingsmetode gebruik om die nodige data te genereer. Aangesien die studie 'n vergelyking tussen twee stelsels is, is gevind dat waar die konvensionele produksie van koring geen mededingende voordele in sekere gebiede van die Wes-Kaap geniet nie, dit weI mededingende voordele tydens organiese verbouing in hierdie gebiede geniet. Alhoewel die onderliggende redes hiervoor kompleks is, kan dit herlei word na die hoe vlakke van beleidslersteurde insette wat tydens die konvensionele produksie van koring gebruik word. Hierteenoor steun organiese produksie meer op plaasgeproduseerde insette wat die distorsies dus verminder. Die netto effek is egter dat die beleidsomgewing 'n " negatiewe impak op produsente, ingeslote potensiele organiese produsente, inhou. Gevolglik word dit aanbeveel dat produsente hul opsies moet oorweeg deur veral te fokus op stelsels, soos organiese verbouing, wat minder beleidversteurde insette gebruik en waar die winsmoontlikhede dus hoer is.

The focus of this study is to explore and expand farmer learning processes in sustainable agriculture workplace contexts. It examines change oriented learning processes in the context of three sustainable agriculture practices. The study begins by discussing the history and emergence of environmental discourses and approaches; sustainable agriculture; and the histories of three kinds of sustainable agriculture practices: Permaculture, Organic Farming and Machobane Farming System. It also traces the evolution of agricultural extension approaches within the wider context of education for sustainable development. The main focus of the study is an exploration of how farmer learning can be mediated through an expansive learning process. The study methodology surfaces some of the contradictions in sustainable agriculture and learning activity systems that farmers encounter in learning and practising sustainable agriculture. It uses these contradictions as sources of expansive learning in and between the respective activity systems of farmers, sustainable agriculture facilitators, agricultural extension workers (conventional) and organic entrepreneurs. As shown in the study, the expansive learning processes result in the modelling, implementation and reviewing of solutions to contradictions being faced in the learning and practice of sustainable agriculture. The study also proposes a number of tools that can be adapted and used by development farmers and agricultural trainers to examine and expand learning as well as build farmer agency. The study was conducted in three case study sites in Lesotho, South Africa and Zimbabwe. In Zimbabwe the study is located in Hwedza district in the St Margaret Primary School and community that learn, practise and facilitate the learning of Permaculture within the Schools and Colleges Permaculture Programme (SCOPE). The second study site is in South Africa: Durban urban and peri-urban areas where a community of organic farmers, facilitators and entrepreneurs coordinate the marketing of their produce through Isidore Farm and Earth Mother Organic and support each other to learn and practise organic farming. The third study site is based in the Mafeteng and Mohale‟s Hoek districts of Lesotho where the focus was on farmers who learn and practise the Machobane Farming System (MFS) and are supported in this by the Rural Self Development Association (RSDA) and the Machobane Agricultural Development Foundation (MADF). Drawing on three sensitising concepts of dialectics, reflexivity and agency, the study worked with Cultural Historical Activity Theory (CHAT) underpinned by critical realism to reveal how farmer learning is mediated and expanded. The theory of practice/habitus also provided a useful theoretical lens with which to examine data generated. Using a two-phased, multiple embedded case study approach, the study worked within the broad framework of social learning. It used semi-structured individual and group interviews, observations and document analysis to explore learning processes and generate „mirror‟ data. This data was then used in Change Laboratory Workshops, within the Developmental Work Research methodology, where double stimulation and focus group discussions contributed to expanding learning processes. Drawing on critical realism the study used inductive, abductive and retroductive modes of inference to analyse data in each case study as well as across case studies. The findings of the study reveal that farmer learning is influenced by both intrinsic motives, such as identity, and extrinsic motives which are primarily associated with economic, ecological and health benefits. Farmers learn through scaffolding and mediating tools that link everyday and scientific knowledge. They also learn from fellow farmers through observation, practising and experimentation. Some of the issues that were raised in connection with farmer learning processes are: language; time to learn, practice and appropriate concepts; time to improve the natural resource base while at the same time improving income generation; and responses to climate change. The study also found that farmer learning and practice of sustainable agriculture in the case studies investigated, is influenced by past and current agricultural and educational policies; societal values and attitudes; social and cultural backgrounds; work affordances and gender relations; quality of training offered; poverty; and, HIV and AIDS. In the second phase of the study, which built on the problematic situations being encountered by research participants (sustainable agriculture farmers, sustainable agriculture facilitators, extension workers, and organic marketers) to surface contradictions, the main finding was that the expansive learning process has potential to enhance farmer learning and practice of sustainable agriculture. It does this by mobilising distributed cognition among participants as well as their preparedness to act. Through the expansive learning processes in each case study, research participants were able to question their practices, surface contradictions, model solutions and implement them, and thus build individual, collective and relational agency reflexively. Observation of this required micro-analysis of agentive talk and reflective talk. The study contributes in-depth insight into participatory research and learning processes, especially within the context of people-centred learning and innovation in the agricultural development arena. It provides empirical and explanatory insight into how change oriented social learning can emerge and be expanded in Education for Sustainable Development, explaining learning and change relationships in three sustainable agricultural practices. It also provides learning and extension tools to work with contradictions that arise from intentionality, experience, context and history in farming and training activity systems. Its key contribution lies in providing in-depth insight into mobilisation of human agency and reflexivity in change oriented sustainable agriculture learning and development, processes that are critical for responding to contemporary socio-ecological issues and risks.

Effective microorganisms (EM), a commercial concoction of microbes that includes yeasts, fungi, bacteria and actinomycetes, have been found to be effective in enhancing crop growth by a number of scholars. It is registered in South Africa, but it had not been thoroughly investigated. The present study investigated the effects of EM on growth, yield and quality of tomato (Lycopersicon esculentum Mill), butternut (Curcurbita moschata) and Swiss chard (Beta vulgaris), along with selected soil properties. In field-grown tomato it was observed that the application of EM caused a significant increase in the number of fruits at seven weeks after transplanting. However, plants treated with EM alone, or EM in combination with other amendments, subsequently produced lower yields owing to an outbreak of early and late blights which affected them the most severely. Combined applications of EM with organic amendments improved plant N content and increased soil N content above initial levels. The application of compost resulted in soil N and P concentrations higher than those of the control presumably due to nutrients being slowly released from the compost material. In a follow up greenhouse trial EM application had a negative effect on tomato leaf dry matter yield, number of leaves, number of trusses, fruit yield and number of fruits. The negative effects of EM were ascribed to N immobilization by the EM that could have resulted in reduced N availability to plants. The lower number of fruits associated with EM application resulted in improved average fruit weight of tomatoes grown in the greenhouse, possibly as a result of more assimilates being partitioned to the few fruits EM application also had a negative effect on field grown butternut as reflected by lower total yield, lower marketable yield and lower first grade yield. The results were attributed to immobilization of N induced by application of EM, and to the inability of EM to control pumpkin fly that attacked very young fruit, resulting in their failure to develop or resulting in the down grading of mature fruits. The application of EM alone had a positive but non significant effect on the yields of both the first and second harvests of Swiss chard. However, when applied with compost or goat manure, a non significant negative effect on yield was observed. When applied with inorganic fertilizer, EM had no effect on yield but tended to increase the uptake of nitrogen by Swiss chard. Though goat manure had a narrower C: N ratio than compost, it did not result in greater EM effectiveness as had been hoped. However, goat manure had a more positive effect on soil properties than compost. It increased the N, P, and K contents of the soil and resulted in a narrower C: N ratio of the soil compared to compost. Generally, the results of the four trials conducted with three different crops indicated that EM had inconsistent effects on crop performance.