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Managing Lolium perenne L. (perennial ryegrass) in a sub-tropical environment in KwaZulu-Natal, South Africa.Mckenzie, Frank Ralph. January 1994 (has links)
Lolium perenne L. (perennial ryegrass) generally fails to persist
under the sub-tropical cpnditions of South Africa. Furthermore,
little research data are available on how to manage this species
locally. This study was designed to identify the management
options, particularly with r espect to grazing defoliation, which
would help enhance the longevity of perennial ryegrass pastures.
This was addressed by:
1) reviewing on-farm management practices of perennial
ryegrass in KwaZulu-Natal;
2) conducting a detailed two-year field study of the effects
of grazing frequency (HF, MF and LF = high, medium and low
frequency, respectively) and intensity (HI, MI and LI =
high, medium and low intensity, respectively), rotationally
applied with the addition of a continuous grazing treatment
(CG), on parameters linked to persistency.
tiller population dynamics, dry matter
These included:
(DM) yield and
quality, perennial ryegrass vigour, weed invasion and root
development; and
3) examining effects of different levels of applied nitrogen
(N) during the establishment year on various parameters
linked to persistency. These included: tiller population
densities, DM yield and quality, perennial ryegrass vigour,
weed invasion and root development.
The review of on-farm management practices of perennial ryegrass
growers in KwaZulu-Natal revealed that reasonably high rates of
N application (e.g. 350 and 250 kg N ha¯¹ a¯¹ to perennial ryegrass
as pure and clover-based stands, respectively) are important for
pasture survival. However, a consistent distribution of the
applied N is even more important (i. e. at least seven split
applications of N onto pure stands of perennial ryegrass and five
onto perennial ryegrass-clover). In terms of grazing management,
the period of absence of animals from the pasture during summer
was identified as the most important grazing variable affecting
pasture survival (i.e. ≥ 21 days). Also, the length of the
period of occupation by animals should be as short as possible,
particularly during summer (i. e. ≤ 3 days). Paying careful attention to summer irrigation is also an important variable
contributing to pasture survival. Grazing intensity was not
highlighted as an important contributor to pasture survival.
In terms of tillering potential, DM yield and quality (cellulose
dry matter disappearance and herbage N) and perennial ryegrass
vigour, perennial ryegrass followed definite seasonal trends.
These were highest during autumn and spring and were lowest
during the mid to late summer period. Perennial ryegrass was
most susceptible to general sward degradation through poor
management during the mid to late summer period when the danger
from weed invasion is greatest and its growth potential, vigour
and tillering abilities are lowest within these seasonal
periods, grazing defoliation produced marked effects. In terms
of tiller survival, DM yield, plant vigour, reduced weed invasion
and root production, treatments incorporating low frequency
grazing (e.g. LFLI and LFHI) generally out-performed (P≤0.05)
those incorporating high frequency grazing, irrespective of the
intensity (e.g. HFHI, HFLI, and continuous grazing (CG)). The
defoliation treatment incorporating medium frequency and
intensity (MFMI) (currently the recommended defoliation strategy
for perennial ryegrass) was also out-performed in many instances
(P~0.05) by the low frequency treatments (e.g. LFHI and LFLI) .
During the establishment year, increasing levels of applied N
increased (P≤O. 05) perennial ryegrass DM yields and herbage
quality. Models predicting the response of DM yield and quality
to applied N suggest linear responses up to 720 kg N ha¯¹ a¯¹.
Further refinement of such models and the inclusion of animal
production parameters is recommended. Maximum (P≤0.05) tiller
population densities occurred at applied N levels of 480 kg ha¯¹
a¯¹. Perennial ryegrass vigour increased (P≤O. 05) with increasing
levels of applied N up to 480 kg h¯¹ a¯¹, but individual tiller
vigour decreased. Increasing levels of applied N up to 360 kg
ha¯¹ a¯¹ suppressed (P≤O. 05) weed tiller densities. Increasing
levels of applied N (up to 600 kg h¯¹) increased (P≤O. 05) the
root organic matter (OM) per unit volume of soil in the top 5 cm
of the soil and decreased root OM per unit volume in the 10 - 20
cm soil depth category. / Thesis (Ph.D.)-University of Natal, Pietermaritzburg, 1994.
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The provision of services in rural areas with special reference to health and education : a case study of Okhombe village in the North-West Drakensberg, KwaZulu-Natal.Sookraj, Anand. January 2002 (has links)
This study is an examination of services in previously disadvantaged rural areas of South
Africa with special reference to health and education. The case study approach was used
in this study and Okhombe Ward of the Amazizi area in Northern Kwazulu-Natal was
selected for this research project.
The purpose of the study was firstly to determine the socio-economic profile of the
people in Okhombe. Secondly, the study intended to identify whether services that
enhance well-being are available in the Okhombe. Thirdly, the study aimed at assessing
the quality and adequacy of the services that are available. Fourthly, the study aimed at
ascertaining the concerns, problems and needs of people. Fifthly, the study intended to
establish whether power dynamics compete with each other in the acquisition and
accessibility of services and; lastly to forward recommendations based on findings from
this research.
The research found that the people were happy with the manner in which decisions were
taken regarding the village. Meetings are called up at the community hall and every
household is invited. There is consultation and negotiation with the people.
This study found that, the health needs of the people are being catered for by the many
traditional healers in the area and a mobile clinic that visits the Okhombe Ward on two
Wednesdays a month. The main clinic that services the Okhombe Ward and entire
Amazizi area is located some ten kilometers from Okhombe. There are no emergency and
hospital services available in the area. While the people are happy with services of the
many traditional healers in the area, they are not satisfied with the present health
provisions by the Department of Health. It is recommended that a full tinle clinic be
established in Okhombe to replace the mobile clinic and that provisions be made for
hospital and emergency services in the Amazizi area.
There is a primary and a high school that caters for the educational needs of the children.
The high school lacks electricity, water supply and an administration building. The
Principal and the heads of departments at the high school make use of space in the
adjacent community hall. Both schools did not have their full complement of educators in
January 2001. The primary school has electricity and a standpipe for water. Further, the
schools did not have resources such as properly maintained sports fields, laboratories,
libraries and good toilet and sanitation facilities. There also was a shortage of desks and
chairs at both schools.
The Okhombe community places great stress on education and this is borne by the fact
that they would like both boys and girls to be educated. They would like a skills training
centre for school leaving children to be established in the area. The people believe that
education and skills training would enable the youth to secure employment in the
competitive labour market. The community also wants Adult Basic Education to be reintroduced
in the area.
The Department of Education must provide the necessary infrastructure in terms of
furniture, administration buildings, ablution facilities, libraries and equipped specialist
rooms. It must also provide a full complement of educators for the schools at the
beginning of each year in order that the schools function at an optimal level. Schools
must offer subjects like woodwork, agricultural science, metalwork, computer studies,
etc. that will help prepare youth for later employment. To this end schools must be
equipped with the necessary workshops, specialist rooms and qualified educators.
A traditional hierarchical system exists in Okhombe. At the local level, the Induna is in
charge. Above the Induna is the Chief. The chief is the most powerful person in the area
under his control and all disputes are taken to the Chief's court. / Thesis (M.A.)-University of Durban-Westville, 2002.
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Dynamics affecting subsistence agricultural production : an exploration of a case study of subsistence crop production within a rural community in the Ingwe Municipality of southern KwaZulu-Natal.Smith, Murray Kay. 28 November 2013 (has links)
Agriculture forms the livelihood basis of several billion people around the world. Despite the increasing trend for rural to urban migration the problems associated with poverty are expected to remain predominantly rural for some time into the future. The challenges associated with rural poverty are particularly important in South Africa where the remaining effects of the oppressive apartheid regime are still vividly evident. The rural population are often stranded in areas of stagnant economic growth and minimal employment opportunities further compounded by low levels of education. The livelihoods of these rural communities, in the former homelands, are often confined to a heavy reliance on remittance incomes and agriculture. However, in the recent past the level of agricultural activity in these rural homelands appears to be declining. This has direct implications for the development agenda in these rural areas. This study is an examination of the various dynamics which have affected the subsistence agriculture sector within a specific community in the former homeland of KwaZulu in Southern KwaZulu-Natal. The responses of 12 respondents, representing independent households, were recorded along with four purpositive interviews with relevant role players in the agricultural sector and in the rural community. The responses shed some light on the multifaceted dynamics which have played an important role in how individual households and the community at large make livelihood choices and how subsistence agriculture fits into these decisions. An increasing reliance on money as the basis of livelihood decisions is resulting in the reliance on agriculture shifting away from a central foundation of household livelihood towards a more supplementary form of food source and risk diversion. Shifting cultural norms have resulted in women and the youth becoming less involved in farming practices in general, which may have been influenced by the expansion of social grants into the rural communities. The changes in dynamics which influence local community and household livelihood decisions are important to consider when determining a possible development initiative in these rural areas. / Thesis (M.Dev.Studies)-University of KwaZulu-Natal, Durban, 2012.
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Investigation of selected hygiene parameters of uMbumbulu small-scale farmers' organic produce (leafy salad vegetables) and subsequent identification of factors affecting farmer practices and food security.Mdluli, Fezile. January 2013 (has links)
The study aimed to investigate the hygiene quality of fresh agricultural produce, irrigation
water and compost from four cooperatives (Jabulani, Nungwane, Senzakahle and
Siyazenzela) supplying the uMbumbulu Agri-Hub Non-Governmental Organisation. In
addition, the influence that socio-economic characteristics such as age, gender, level of
education and training had on the uMbumbulu farmers’ hygienic practices was investigated.
Questionnaires, key informant interviews and laboratory analysis were used to collect data.
The most probable number (MPN) method, a microbiological technique, was used to
quantify selected hygiene indicators (i.e. total and faecal coliforms including Escherichia
coli) from compost, irrigation water and leafy vegetables (spinach and lettuce) during the
months of October, November and December 2011. Microbiological analysis on lettuce and
spinach produced by the four Agri-Hub cooperatives confirmed that these vegetables were
safe to eat and unlikely to cause sickness. The irrigation water sources, vegetables and
compost faecal coliform levels met national standards with faecal coliforms of <1 000
MPN/100ml for irrigation and<200 MPN/g for the leafy salad vegetables. Compost faecal
coliform levels were <1000/g and E. coli levels of <30 MPN/g, these levels decreased over
the 3 months. Descriptive statistics such as the Chi-Square test using IBM SPSS and a
logistic regression was performed using the STATA 11 software. The sample consisted of
60% female and 40% males, most of which (73%) were above the age of 40. A total of 60%
of respondents received income from farming activities, receiving revenues of between
R150- R250 a week. The logistic regression indicated that farmers already receiving some
income from farming activities and those that had received training on hygienic farming
practices were likely to wash hands and equipment prior to entering the field compared to
those who had not. These variables influenced the hygienic practices with a probability of
26% and 32% respectively at 5% significance level. The logistic regression also showed that
respondents with primary or no formal education were less likely to wash hands and
equipment prior to entering the field compared to those who had a secondary level
education. This unlikelihood had a probability of 35% for primary education and 43% for
farmers with no formal education at significance levels of 5% and 10% respectively. This
study indicates how training, education and farming experience are important and effective
tools in implementing good hygienic practices in small-scale farming. The study’s main recommendations are that policies encourage farmer awareness on their responsibility of
producing vegetables that are of good hygienic quality, especially if such produce is to reach
the market. Furthermore policies should advocate for small-scale farmer training. This
training should not be limited to subsistence farming but should also aim at preparing
farmers towards accessing produce markets. Farmer training in hygienic practices should aid
farmers to meet the stringent market standards allowing for better access, the regular income
from such activities support farming as a livelihood and bearer of food security. It must also
be noted that farmers require support in attaining the various resources needed in order to
successfully and continually supply markets. / Thesis (M.Sc.Agric.)-University of KwaZulu-Natal, Pietermaritzburg, 2013.
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School governing bodies in addressing issues of democracy and social justice : a case study of two rural primary schools in KwaZulu-Natal.Zulu, Sindisiwe O. January 2013 (has links)
This study investigated the role played by School Governing Bodies (SGBs) in addressing issues of democracy and social justice in schools. A case study was conducted in two rural primary schools from Ugu district in KwaZulu-Natal. The intention of this study was to highlight the factors that hinder full participation of all SGB members in public state schools, including rural primary schools. It was also to gauge the policies and strategies employed by SGBs when addressing issues of democracy and social justice in their schools. My study is a qualitative research which has utilized a case study approach. I have opted for a qualitative methodology because I intended to explore phenomena, (SGBs), in their natural settings and I was be able to use multi- data collecting methods, i.e. interviews, observations and document reviews, which enabled me to interpret, understand, explain and bring meaning to them (Anderson, 1998). I have opted for a case study approach because I was studying the particularity and complexity of two SGBs, coming to understand their activities within important circumstances, in this case, the SGB roles in addressing issues of democracy and social justice (Stake, 1995). The theories that underpin this study are democratic schooling and social justice. I have reviewed local and internal literature on parental involvement and social justice in this study. This project has afforded me with the opportunity to engage with SGBs through interviews and I have been able to gauge amongst other things, their understandings of the role that SGBs must play in addressing issues of democracy and social justice. I was also able to learn the frustrations experienced by SGBs when implementing the policies in schools. Some of these frustrations were due to the challenges that some educators and some parents pose for the SGBs in the day-to-day running of the SGBs.
Based on the findings I have made some recommendations such as that schools must introduce class or grade representatives which could serve in some committees. Female learners could also be involved in activities such as debates in order to enhance their self-confidence. Policies that the SGBs use when addressing democracy and social justice in the schools could be translated into isiZulu to make sure that all stakeholders understand these policies. The Department of Education could also assist the schools in ensuring that parents in rural areas have access to ABET classes, where they can learn to read and write as well as acquire relevant skills. / Thesis (M.Ed.)-University of KwaZulu-Natal, Durban, 2013.
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Assessment of information literacy skills of first-year students at Mangosuthu Technikon at a pre-library orientation and instruction phase.Zimu, Acquinatta Nomusa. January 2005 (has links)
This study assessed the information literacy (IL) skills of first-year students at Mangosuthu Technikon (MANTEC) at a pre-library orientation and instruction phase. What is evident is that students do, to a greater or lesser degree, display inadequate levels of IL skills. What is not so evident is the extent and nature of these inadequacies. The purpose of the study was to establish the
level of these inadequacies. Background information concerning the MANTEC library orientation and instruction programme and the Eastern Seaboard Association of Libraries (esAL) User Education Pilot Project study was provided and an overview of MANTEC and its library was given. The assessment of IL skills in higher education libraries, with reference to the MANTEC library was discussed. The MANTEC students' IL skills were assessed using Bloom's Taxonomy of Educational Objectives, which are
evident throughout the objectives of the study. The research method used for this study was the descriptive survey method. The sample consisted of 170 first-year students. A purposive sampling procedure was used. The questionnaire consisted of two main sections, one which elicited demographic data of students and the other extracted data that addressed the objectives of the study. Results were coded and analyzed using the SPSS program. The findings of the survey indicated that there is a dearth of IL skills among the majority of MANTEC first-year students. Like many other studies it revealed that many first-year students, especially from the historically disadvantaged institutions (HDI) are under-prepared for tertiary education generally and for IL demands made on them at the tertiary level. Even those who have had previous library exposure appear to bring with them little or no IL competencies to tertiary institutions. Based on the findings for this study, recommendations were made with the aim of improving MANTEC students' IL skills. / Thesis (M.I.S.)-University of KwaZulu-Natal, Pietermaritzburg, 2005.
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Staff attitudes to access and outreach in KwaZulu-Natal Archives.Koopman, Jewel Margaret. January 2002 (has links)
The purpose of this study was to investigate staff attitudes to access and outreach in the three provincial and two of the university-based private archives of KwaZulu-Natal (KZN), South Africa. The position with regard to physical, legal and bibliographic access, including reference services and user education, was explored through visiting the five archives and discussing the situation with archives staff, using the "Checklist for a visit to an archives repository" as the first survey instrument. A survey was then conducted among the 45 staff members, using the second survey instrument: "Survey of archives in KwaZulu-Natal: staff questionnaire", in order to find out if archives inKZN hold outreach activities to publicise themselves and promote their use, and if so, which activities are held, and what attitudes staff hold with regard to these activities. To provide the necessary background information, a literature review was done. The archival situation was looked at from all aspects, starting with a brief overview ofthe history, development and usage ofarchives in the Western World, Africa and South Africa and focussing on the current policy and situation in KZN. Background information was also given on the issues of reference services, public programming and outreach in archives generally and in South Africa in particular. The results of the checklist and questionnaire were then analysed, and revealed difficulties with
physical and bibliographic or intellectual access, a lack of user education, and deficiencies in staff qualifications and training. It was found that four out of five archives had held outreach activities, and that there was a growing awareness ofthe need to publicise archives. Activities preferred by
staff and user differed from archive to archive. Staff needed to be aware ofwhich type of activity would appeal to each different sector ofthe public. Staff attitudes varied on such topics as best ways ofencouraging users into the archives, factors causing archives not to encourage new users,
and factors causing lack of interest of potential users. It was found that there was a dearth of public relations training both in degrees and diplomas, and of in-service training. Recommendations were then made for, among others, improvements to premises, reading room service and user education; upgrading of archives qualifications; provision of in-service training and outreach workshops, based on the findings of the study. / Thesis (M.I.S.)-University of Natal, Pietermaritzburg, 2002.
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Reporting violent conflict in Kwazulu-Natal : an assessment of selected sources for conflict research.Louw, Antoinette. January 1995 (has links)
The main aim of this study was to investigate which factors are likely to affect the
probability that events of violent collective action are reported by the press in
KwaZulu-Natal. The study hypothesised that the likelihood of violent conflict events
being reported by the press is affected by certain characteristics of the events
themselves, such as their intensity and size, and by the environment in which
events occur, such as their physicai location and the prevailing political context.
The study was limited to the KwaZulu-Natal province where levels of violent
collective action have been the highest in the country over the past decade. This
province is also home to many violence monitoring agencies, which constituted an
important alternative source of information against which the reporting trends of the
newspapers in the province could be compared.
The main source of information used in this study was the Conflict Trends in
KwaZulu-Natal project's database of collective action events, which comprises
events reported by both the press and the monitoring agencies. Data on a total of
3990 violent conflict events was analysed during 1987, 1990 and 1994, in the form
of comparisons between the reporting tendencies of the press and the monitors.
Interviews were also conducted with reporters and editors of the daily newspapers
in KwaZulu-Natal, as well as with selected monitoring agency staff members.
These interviews provided valuable information about how these media operate,
and the factors which constrain their violence reporting activities. The most support was found for the argument that the political context influences
violence reporting by the press. Analyses suggested that in all three years studied,
the press contribution to the database decreased as monthly levels of violent
conflict increased. This was explained in relation to the prevailing political context.
The results also showed that reporting trends changed over time. In the earlier
years, the press did not appear to be more inclined to report events of larger size
and intensity, or events which were close to the newspapers' base. In 1994,
however, this trend was reversed.
There also was no clear evidence that the States of Emergency impacted
negatively on press reporting of violence in terms of the variables studied. In
addition, the study concluded that both the press and the monitOring agencies had
made important separate contributions to the database on violent collective action.
It is, therefore, vital that systematic studies of violent conflict in KwaZulu-Natal
make use of multiple sources of data. / Thesis (M.A.)-University of Natal, Durban, 1995.
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A pilot investigation into the phenomenon of murder-suicide in Durban, KwaZulu-Natal.Townsend, Kerry Lynne. January 2003 (has links)
Research on murder-suicide within the South African context has been limited with the last published study in 1992 (Roos, Beyers, & Visser, 1992). This particular study investigated the phenomenon of murder-suicide in the city of Durban using techniques previously applied in a broad range of international studies (Berman, 1979; Cooper & Eaves, 1996; Rosenbaum,
1990). The study served as a pilot for a broader national study. The aim of this pilot study was to investigate the incidence of murder-suicide in the sample and to generate demographic profiles of perpetrators and victims. It was hoped that the results from this study would pioneer the development of accurate base rates of murder-suicide in South Africa as there are
currently no statistics of South African murder-suicide rates or characteristics. The sample consisted of 21 murder-suicide cases with 43 individuals in total having died from the murder-suicide events. The sample covered all murder-suicides in the Durban Metro area over the years 2000 and 2001. A Durban Metro Murder-Suicide Incidence Form was used to collect the data from post mortem examination reports at Gale Street Mortuary. Corresponding police reports where available substantiated this data. The incident rate of murder-suicide in Durban over the two-year period was found to be higher than the international average. This may be attributed to the violent social context in which the study took place. The reliability of this finding would be influenced by the small sample size. Typical profiles of perpetrators and victims were generated. The typical profile of a perpetrator was found to be a Black male aged 32 years with a secondary school education and currently unemployed or working in the police or security sector. He was typically be the boyfriend or spouse of the victim and committed the homicide and suicide using a firearm. The typical profile of a victim was a Black female aged 26 years with at least a secondary school education and currently unemployed. She was typically the spouse or girlfriend of the perpetrator. Her death would usually be attributed to multiple gunshot wounds to the head or chest. The findings suggest that Durban's murder-suicides profiles follow similar patterns to those observed internationally. / Thesis (M.A.)-University of Natal, Pietermaritzburg, 2003.
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Short-term effects of mixed grazing by cattle and sheep in highland sourveld.Hardy, Mark Benedict. January 1994 (has links)
Data derived from a long-term grazing trial were used to
determine short-term effects of mixed grazing by cattle and sheep
in Highland Sourveld.
Five cattle to sheep ratio treatments (viz. 1 :0, 3:1, 1 :1, 1 :3,
0:1) were applied, each at three stocking rates (viz. 0.5 (low),
0.71 (medium) and 1.0 (high) animal unit equivalents (AUE) ha¯¹).
Ratios were expressed in terms of AUE cattle: AUE sheep. Stocking
rate and ratio treatments were balanced at the start of each
grazing season. Fourteen-month old Hereford steers and 'two-tooth'
Merino wethers were used as experimental animals.
The trial comprised two components, viz. an animal production
component and a simulated component. The animal production
component was conducted only in the medium stocking rate
treatment where the effect cattle to sheep ratio on the
performance of cattle and sheep was determined for each of four
grazing seasons (viz. 1989/90,
four-paddock rotational grazing
The low and high stocking rate
1990/91, 1991/92, 1992/93). A
management system was applied.
treatments were implemented by
simulating a four-paddock rotational grazing system and using a
single paddock for each stocking rate/ratio combination. Grazing
of the simulated treatments coincided with the grazing of a
specific 'test' paddock in each ratio of the medium stocking rate
treatment. These 'test' paddocks and the simulated treatment
paddocks were monitored to determine the impact of mixed grazing
by cattle and sheep on individual grass plants and the sward.
The whole of the experimental area was rested during the growing
season prior to the start of the trial and all paddocks were
burnt in the dormant season just before the start of the first
grazing season. The trial therefore commenced with a with a
uniform sward of immature herbage in all paddocks allocated to
each group of animals. ln the second and subsequent growing
seasons only those paddocks which had been rested in the previous season were burned prior to the onset of growth in early spring.
Rainfall for the first three grazing seasons was similar to the
long-term mean of 790mm whilst the last season was considered
'dry' with 554mm recorded during 1992/93.
In all grazing seasons, as the proportion of cattle in the
species mix increased, sheep performance increased. A decline in
sheep performance was recorded in each ratio treatment from the
first to the third season. This decline was attributed to the
increased maturity and thus lower quality of herbage on offer to
the sheep, and the fact that only one paddock available to the
animals in the second and third grazing seasons had been burned
prior to the start of the season. Sheep performed best during
the 'dry' season where herbage quality was maintained for longer
into the grazing season than in previous seasons. In contrast,
cattle performance was affected by the stocking rate (animals
ha¯¹) of cattle rather than the presence of sheep. As the
quantity of herbage on offer per steer declined steer performance
declined.
Animal performance data were also used to predict the effects of
adding cattle to a sheep production enterprise and vice versa.
The general trends were that the introduction of cattle into a
low stocking rate, sheep-only production enterprise would allow
for an increase in the stocking rate of sheep while maintaining
the performance of the sheep. In this way the carrying capacity
of a farm may be improved.
Stocki ng rate and ratio treatments varied from those established
at the start of each grazing season due to the differential
performance of the cattle and sheep in each treatment. As the
proportion of cattle in the species mix increased, stocking rate
increased and the ratio widened in favour of cattle. Stocking
rate (AUE ha¯¹), calculated a posteriori for each season, was the
major influence on the severity of grazing on individual plants
and within patches. As stocking rate of cattle and sheep at the
various ratios increased, the extent and severity of grazing increased. At stocking rates in excess of O.8AUE ha¯¹ however,
sheep-only grazing resulted in a greater proportion of plants,
per species and per area, being grazed more severely than was the
case for an equivalent stocking rate (AUE ha¯¹
) of cattle.
Furthermore, cattle and sheep had similar effects on patch size
distribution when stocked at the same number of AUE ha¯¹.
There were no measurable effects of stocking rate and ratio on
proportional species composition and basal cover over a two year
monitoring period. A technique for estimating basal cover in
tufted grasslands was developed and is presented as an appendix
to the thesis.
Data were also used to evaluate the use of AUE as an integral
part of the grazing capaci ty concept. Results indicated that
cattle and sheep cannot be equated in terms of AUE when referring
to the grazing impact. It is suggested that the definition of
grazing capacity should include the species of livestock and
assume a grazing management system appropriate to the grazing
habit of the animals concerned.
Resul ts of the trial provide strong indications that, in the
long-term, the current recommendations of grazing cattle together
with sheep in order to prevent the degradation or loss of veld
condition which occurs in sheep-only grazing systems, will not
succeed. A four-paddock rotation grazing system does not appear
to be an appropriate veld management system for sustainable sheep
production in sour grassveld. An alternative approach to veld
management is suggested in which the sheep are confined to only
those areas of the farm which were burnt at the start of the
grazing season. Ideally, sheep should not allocated to the same
paddock for two consecutive grazing seasons. / Thesis (Ph.D.)-University of Natal, Pietermaritzburg, 1994.
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